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[[Category:Pioneers of the British Geological Survey]]
[[Category:Pioneers of the British Geological Survey]]
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'''Chapter 6 Petrographical descriptions of Scottish limestones'''
== Lewisian ==
=== Argyll ===
GS1 (p. 17) Coccolite marble. Quarry 92 yd E. 31° S. of Balephetrish, Tiree. 1" sheet 42; 6" Argyll. 64 N.E. (Anal. C.O. Harvey).
An elongated mass of marble, 200 ft by 50 ft, enclosed on three sides by black hornblende-augite-gneiss; fourth side passes under drift.
(S31697). Pink marble speckled with green clots. The section shows an aggregation of very fine-grained calcite in which numerous lens-shaped relics of larger grains are arranged parallel in shear-schistosity. Rounded crystals of pale green pyroxene, micacized scapolite, a negative alkali-feldspar and large grains of calcite form xenolith-like aggregates. Sphene, apatite and limonitic aggregate are accessory constituents which occur both as isolated grains in the calcite matrix and in associ­ation with the pyroxene clusters.
''Limestone with calcsilicates, micrograined, pseudoporphyroblastic, grano-schistose, sheared.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=374442 S31697]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120600 P552546] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120602 P552547] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120605 P552548] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120608 P552549] Mag: 40 Light: XPL
=== Inverness ===
SL 106 (p. 17) Marble. Old Quarry 250 yd S.W. of W. end of Loch an Sgor Ghaothair'','' Glen Urquhart. 1" sheet 73; 6" Inverness. 29 N.W. (''Lst. Scotland,'' 1949, p. 116.)
(S34585). Coarse crystalline marble with numerous phlogopite, calc-silicate and ore grains. Composed of interlocking large grains of calcite within and between which are scattered grains of quartz, prisms of tremolite and flakes of phlogopite. Quartz is more abundant in some bands and is then accompanied by large grains of zoisite, containing vermicular inclusions of quartz, and by muscovite. Sphene, oligoclase, apatite, rutile and pyrite are accessory. Sphene grains in phlogopite have pleochroic haloes.
''Limestone with phlogopite and calcsilicates, coarse-grained, granoblastic, foliated.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=260058 S34585]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121223 P552763] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121220 P552762] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102802 P527968] Thin section
=== Ross and Cromarty ===
SL 258 (p. 17) Limestone. Old Quarry, E. bank of Allt Folais, 620 yd N. of Letterewe House. 1" sheet 92; 6" Ross. 58 N.W. (''Lst. Scot,'' 1949, p. 166).
(S35262). Massive, white, fine-grained limestone. The slide shows a limestone which has been sheared so that eye-shaped fragments about 0.3 mm in size and irregularly lenticular areas of medium-grained car­bonate are set in a parallel arrangement in a finely granular matrix of about 0.02 mm grain. Colourless phlogopite is accessory and lies in the direction of lenticularity of the calcite. The carbonate is partly calcite and partly aragonite, the admixture being patchy and without regular pattern, but the eye-shaped fragments are all of calcite.
''Limestone with aragonite, varigrained, sheared.''
(S35263). A pale cream-coloured limestone containing numerous small cavities; effervesces freely with cold dilute HCl. Composed of mixed finely and coarsely granular carbonate which, on test by refractive index methods, is essentially calcite; no aragonite but some dolomite is present.
The finer grained material is turbid and of grain-size about 0.02 mm. Phlogopite occurs as irregular flakes in the turbid carbonate and a small amount of quartz is present.
''Dolomitic limestone, fine-grained, mesh-recrystallized, holey.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=271185 S35262]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102998 P528024] Thin section
SL 259 (p. 17) Limestone and dolomite. Old quarry, W. bank of Allt Folais, 690 yd N. of Letterewe House. 1" Sheet 92; 6" Ross. 58 N.W. (''Lst.Scot.,'' 1949, p. 166).
(S35264). Thinly and irregularly flaggy limestone with a reticulation of thin veins of calcite. The slide shows a rock in which angular grains of calcite about 0.05 to 0.3 mm across are scattered like grains of grit in a very fine matrix of carbonate of grain-size 0.01 mm. This is cut by thin veins containing calcite, quartz and barytes. The latter two minerals occur also in small aggregates throughout the rock. Phlogopite is present in flakes up to 0.5 mm long. The residue from solution in 1:3 HCl, cold, shows barytes, quartz, phlogopite and dolomite in that order of abundance. A sericitic clay aggregate is also present. Some curious small spheroidal growths of calcite in the rock seem to be of the same age as the formation of phlogopite.
''Limestone with quartz, barytes, phlogopite and dolomite, fine-grained, pseudo gritty mortar-structure, sheared.''
(S35265). Whitish micro-nodular dolomite, with phlogopite coating divisional planes; effervesces slightly in cold dilute HCl. The rock is a crushed dolomite with a gritty appearance in thin section owing to the distribution of larger irregular grains of carbonate (up to 1.0 mm across) in a matrix which is of variable but very fine grain. Phlogopite, musco­vite and tremolite are abundantly present and the latter occurs as in­complete prisms or relict shreds in fibrous carbonate. Tourmaline (elbaite) is an abundant accessory, forming stout, fractured prisms up to 0.2 mm long. Colourless in thin sections, it shows: O, faint green, E faint pink in separated grains; ɷ =1.639. Tests in crush show dolomite as the main constituent, but calcite is abundant.
''Calcareous dolomite with micas and tremolite; fine-grained, pseudo-gritty mortar-structure, crushed.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=271187 S35264]
Limestone-and dolomite. Old quarry, west bank of Allt Folais, 690 yards north of Letterewe House. Ross & Cromarty. Thinly and irregularly flaggy limestone with a reticulation of thin veins of calcite. The slide shows a rock in which angular grains of calcite about 0.05 to 0.3 mm across are scattered like grains of grit in a very fine matrix of carbonate of grain size 0.01 mm. This is cut by thin veins containing calcite, quartz and barytes. The latter two minerals occur also in small aggregates throughout the rock. Phlogopite is present in flakes up to 0.5 mm long. The residue from solution in 1 : 3 HCl, cold, shows barytes, quartz, phlogopite and dolomite in that order of abundance. A sericitic clay aggregate is also present, Some curious small spheroidal growths of calcite in the rock seem to be of the same age as the formation of phlogopite. Limestone with quartz, barytes, phlogopite and dolomite, fine-grained, pseudo-gritty mortar-structure, sheared. S 35265, Whitish micro-nodular dolomite, with phlogopite coating divisional planes; effervesces slightly in cold dilute HCl. The rock is a crushed dolomite with a gritty appearance in thin section owing to the distribution of larger irregular grains of carbonate (up to 1.0 mm across) in a matrix which is of variable but very fine grain. Phlogopite, muscovite and tremolite are abundantly present and the latter occurs as incomplete prisms or relict shreds in fibrous carbonate. Tourmaline (elbaite) is an abundant accessory, forming stout, fractured prisms up to 0.2 mm long. Colourless in thin sections, it shows: O, faint green, E faint pink in separated grains; omega = 1.639. Tests in crush show dolomite as the main constituent, but calcite is abundant. Calcareous dolomite with micas and tremolite; fine-grained, pseudo-gritty mortar-structure, crushed. SL0259. Britrocks S35265.
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=271188 S35265]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121929 P552998] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121932 P552999] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121935 P553000] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121938 P553001] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=103001 P528025] Thin section
SL 260 (p. 17) Limestone and dolomite. Old quarry, N. bank of Allt Coire nan Dearcaig, 50 yd upstream from junction with Allt Airidh a' Char. 1" Sheet 91; 6" Ross. 45 S.E.
(S35266). A pale violet limestone with films of yellow-green phlogopite. Composed of irregular fragments of calcite in a matrix of turbid, very finely granular calcite. Contorted phlogopite, chlorite and spongy tremolite, partly replaced by the carbonate matrix, are abundant. The matrix invades the fragmental calcite along 'corrosion' embayments and cracks. The rock has clearly been crushed and there are some short lengths of shear lines. After shearing there seems to have been brecciation and more uniform pressure under which the fine matrix formed a plastic medium which showed no shear effects. The mean refractive index of the tremolite is β =1.620. Apatite and limonite are accessory.
''Limestone with mica, chlorite and tremolite, medium-grained, pseudo-gritty mortar-structure, crushed.''
(S35267). White dolomite with greenish-yellow films. The rock scarcely effervesces with cold dilute HCl. In thin section it is seen to be composed of fractured carbonate fragments with close and often bent twinning, up to 1 mm across, in a matrix of granular clear carbonate of grain-size 0.02 to 0.1 mm. Plates of phlogopite, usually about 0.4 mm long, are numerous and are often concentrated along undulating laminae. The larger carbonate fragments are sometimes replaced spongily by granular carbonate, the detached pieces remaining in optical continuity. Colourless tourmaline is an accessory and is sometimes enclosed in phlogopite. Quartz and small aggregates of kaolin are accessory. No refractive index of carbonate other than that of dolomite was noted in the powdered rock.
''Dolomite with phlogopite, fine-grained, pseudo gritty mortar-structure, foliated.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=278188 S35266]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121939 P553002] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121944 P553003] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=103005 P528026] Thin section
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=278189 S35267]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121946 P553004] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121949 P553005] Mag: 40 Light: PPL
SL 261 (p. 17) Dolomite. Old quarry 430 yd E. 14° S. of Sheildaig Lodge, Gairloch. 1" Sheet 91; 6" Ross. 56 N.W.
(S35268). A white coarsely crystalline dolomite containing scales of pale brown mica. Composed of interlocking grains of carbonate up to 1.5 mm long and usually slightly elongated in the direction of foliation as shown by the mica flakes. These are abundant, colourless, almost uniaxial highly birefringent phlogopite. Quartz is an abundant accessory or subordinate constituent and is arranged in lenticular groups of elon­gated twinned grains in which all the directions of elongation are parallel to the foliation. Colourless tourmaline is an abundant accessory, in stout prisms with rounded terminations, up to 0.5 mm long. The carbonate is locally slightly granulitized. In powder the refractive index of dolomite only was observed.
''Dolomite with phlogopite and quartz, medium-grained, foliated.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=278190 S35268]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121953 P553006] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121955 P553007] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=103010 P528027] Thin section
SL 262 (p. 18) Dolomite. Old quarry 260 yd N.W. of outflow from Am Feur Loch. 1" Sheet 91; 6" Ross. 57 N.W.
(S35269). A pinkish massive dolomite. Composed of equidimensional but irregular fragments of carbonate, greatly cleaved and twinned and irregularly invaded by the matrix, which is of granular carbonate of average 0.05 mm grain diameter. The only other constituents are scarce flakes of phlogopite and streaks of oxidized iron ore with which small scarce aggregates of chlorite are associated. Only dolomite was noted by refractive index tests on the powdered rock.
''Dolomite, fine-grained, pseudo gritty mortar structure.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=278191 S35269]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121957 P553008] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121960 P553009] Mag: 40 Light: XPL
SL 263 (p. 18) Limestone. 650 yd N. 18° E. of outflow of Lochan Druim na Fearna. 1" Sheet 91; 6" Ross. 57 S.W.
(S35270). A crystalline calcareous dolomite, foliated and with greenish laminae; traversed by pinkish ferruginous streaks and cracks. Composed of interlocking grains of twinned and cleaved dolomite slightly elongated in the direction of foliation, with finely granular calcite on the periphery, in irregular spaces within the dolomite grains and in irregular laminae through the rock. Phlogopite, partly chloritized, tremolite and quartz are subordinate minerals and are elongated in the direction of foliation. Colourless tourmaline and apatite are accessory, and a little rutile is present in small aggregates of irregular deep brown grains. Limonitized iron ore is intergrown locally with mica. The refractive index of dolomite only was seen in the crush and all the fragments tested were uniaxial.
''Calcareous dolomite with phlogopite, quartz and tremolite, medium-grained, foliated and strained.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=278192 S35270(a)]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121965 P553010] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121966 P553011] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121971 P553012] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121972 P553013] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=103014 P528028] Thin section
== Moine ==
=== Inverness ===
SL 107 (p. 18). Limestone. Rebeg Quarry. 1" Sheet 83; 6" Inverness. 11 S.W.
(S34586). Coarse, flaggy banded white and grey crystalline limestone. Large grains of twinned calcite are closely interlocked and tend to be elongated parallel to the foliation. Small quartz grains and muscovite flakes are scattered sparsely through the calcite. In bands there is a considerable concentration of tremolite, patched by crocidolite, and phlogopite which are orientated with their long axes parallel to the plane of foliation. Grains of oxidized iron ore and trains of limonitic material occur; there are many small grains of yellow pyrite, and acute lozenges of sphene are accessory.
''Limestone with phlogopite and tremolite, coarse-grained, foliated, grano-schistose.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=268737 S34586]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121224 P552764] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121227 P552765] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102805 P527969] Thin section
=== Sutherland ===
SL 169 (p 18). Limestone. Shinness Quarry, the Airde, near Lairg. 1" Sheet 102; 6" Sutherland 85 S.E. (''Lst. Scot.,'' 1949, p. 192).
(S34852). A coarse, grey-white crystalline limestone mottled with greenish calcsilicates. In thin section anhedral grains of calcite up to 5.0 mm in width are seen to interlock with one another and with diopside which forms thick prisms imperfectly developea and up to 6 mm in length. Tremolite is often present as small blades in the diopside and locally forms large prisms with replacing relations to the associated diopside.
''Limestone with diopside and tremolite, coarse-grained, porphyroblastic.''
(S34853). White crystalline limestone. Composed of a mosaic of inter­locking grains of calcite up to 6.0 mm across. Tremolite and phlogopite are present in only accessory proportions and rarely reach more than 1.0 mm in length. They lie along the interfaces of calcite grains and are only rarely enclosed in calcite. Apatite and sphene are accessory. ''Limestone with phlogopite, coarse-grained, foliated.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=265555 S34852]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121501 P552856] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121505 P552857] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102864 P527992] Thin section
== Shetland metamorphic ==
=== Shetland ===
SL 184 (p. 18). Limestone. S. side of Bay of Fladdabister. 1" Sheet 126; 6" Shetland 59 N.E. (''Lst. Scot.,'' 1949, p. 173).
(S34947). A grey crystalline limestone with thin dark seams. Composed essentially of anhedral grains of calcite showing close glide twinning. The grains, which are about 1.0 mm long, interlock, or are cemented by finely granular calcite which is due to trituration by shearing; similar fine calcite cuts through the larger calcite grains and also forms thin parallel seams. Quartz in grains 04–0.2 mm across, and small flakes of muscovite are abundant accessories. A little finely divided opaque mineral is present, the larger grains being recognizable as oxidized iron-ore, probably pyrite. Apatite and tourmaline are accessory.
''Limestone with some quartz and muscovite, medium-grained, sheared, granoschistose.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=320842 S34947]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121631 P552899] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121628 P552898] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102904 P528002] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102387 P527848] Hand specimen
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102382 P527846] Hand specimen
SL 185 Tingwall Limestone. mile N. of Scalloway. 1" Sheet 126; 6" Shetland (p. 18) 56 N.W. (''Lst. Scot.,'' 1949, p. 173).
(S34948). A grey crystalline limestone with occasional micaceous films. Consists essentially of intricately sutured grains of calcite, about 0.5 mm across, together with about 25 per cent of quartz in grains which are usually distributed singly among the calcite but also form small aggregates with or without associated muscovite. Muscovite occurs also in irregular or streaky aggregates, with some, of which red biotite and alkali-feldspar are associated. A little dolomite is present in rhombs about 2 mm across. Pyrite, rutile and opaque mineral dust are common accessories; tourma­line is scarce.
''Limestone, dolomitic, with quartz, muscovite, biotite and pyrite, medium-grained, foliated, heteroblastic.''
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121633 P552900] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121638 P552901] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102908 P528003] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102375 P527843] Hand specimen
SL 186 (p. 19) Tingwall Limestone. Quarry, E. side of road 1 mile N.N.E. of Scalloway. 1" Sheet 126; 6" Shetland 52 S.E. (''Lst. Scot.,'' 1949, p. 173).
(S34949)–(S34950). A grey crystalline limestone: (S34949) shows a lamination in shades of grey and (S34950) is thinly flaggy. The rock is composed of anhedral interlocking grains of twinned calcite, with thin laminae of muscovite, or muscovite-graphite-schist. These laminae have been cut into schlieren by the flowage of calcite and show internal schistosity differing in direction from the parallel arrangement of the schlieren. Quartz is sparsely distributed among the calcite and graphite is dis­seminated on the grain surfaces in the calcite bands. Pyrite is accessory; apatite scarce.
(S34949) ''Limestone with quartz and graphite-schist, medium-grained, foliated, heteroblastic.''
(S34950) ''Limestone with graphite, quartz and pyrite, fine-grained, sheared.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=320844 S34949]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121643 P552903] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121641 P552902] Mag: 40 Light: PPL
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=320845 S34950]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121650 P552905] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121645 P552904] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102912 P528004] Thin section
SL 187 (p. 19) Tingwall Limestone. Girlsta Quarry, near shore of Wadbister Voe. 1" Sheet 128; 6" Shetland 48 N.E. (''Lst. Scot.,'' 1949, pp. 173–4).
(S34951). A pale grey, fine-grained crystalline limestone. The rock is composed of interlocking grains of calcite 0.5 mm across, which show glide twinning and a little peripheral granulation. Quartz is abundant, about 5–10 per cent by volume, in small grains, and occurs also as larger grains in quartz-clinochlore aggregates. Muscovite is in places a sub­ordinate mineral and elsewhere is only accessory. Pyrite is accessory.
''Limestone with quartz, chlorite and muscovite, medium-grained, grano-blastic, foliated.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=323838 S34951]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121656 P552907] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121651 P552906] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102916 P528005] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102380 P527845] Hand specimen
SL 188 Whiteness Limestone. W. of Whiteness Quarry, W. side of Loch of Strom. (p. 19) 1" Sheet 128; 6" Shetland 48 S.W. (''Lst. Scot.,'' 1949, p. 173).
(S34952). Coarse crystalline limestone. Composed of interlocking grains of calcite, 0.2 to fully 1 mm across, with subordinate quartz which tends to occur in more or less parallel, widely spaced streaks and clots of grains individually 0.2–0.5 mm across. A little pyrite, rutile and opaque mineral dust are present and muscovite is in places an abundant accessory.
''Limestone with quartz, medium-grained, granoblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=323839 S34952]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121662 P552909] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121658 P552908] Mag: 40 Light: PPL
SL 189 (p. 19) Weisdale Limestone. Quarry on W. side of road half a mile S. of Flemington. 1" Sheet 128; 6" Shetland 43 S.W. (''Lst. Scot.,'' 1949, p. 174).
(S34953). A massive, pale grey, siliceous fine-grained, crystalline lime­stone. Composed of equidimensional grains of calcite, 0.5 mm across, with quartz occurring in interstitial aggregates of small grains, 0–1-0.2 mm across, and forming about 30 per cent by volume of the rock. Pyrite and muscovite are abundant. Zircon, rutile, tourmaline and apatite are accessory.
''Limestone with quartz, muscovite and pyrite, medium-grained, hetero-blastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=323840 S34953]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121664 P552910] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121668 P552911] Mag: 40 Light: XPL
SL 190 (p. 19) Weisdale Limestone. Sursetter, 1 ½ miles N. of Voe. 1" Sheet 128; 6" Shetland 37 N.E. (''Lst. Scot.,'' 1949, p. 174).
(S34954). A moderately coarse-grained, white, crystalline limestone. It is composed of coarsely sutured grains of calcite, about 1 mm long, which tend to be elongated in a direction of rather poor schistosity defined by a general parallel orientation of muscovite. The latter is a subordinate essential constituent forming flakes approaching, and rarely exceeding, 1 mm in length. A minor quantity of oligoclase and quartz is present, generally in association with muscovite. Prismatic zoisite, tremolite and a fibrous aggregate which develops into micaceous flakes, are minor essential constituents. Zoisite and muscovite form symplectitic intergrowths with quartz. Colourless tourmaline in small hexagonal prisms, leucoxene, pyrite and pyrrhotite are abundant; apatite, sphene and zircon are scarce accessories.
''Limestone with zoisite and muscovite, medium-grained, granoschistose, porphyroblastic, foliated.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=323841 S34954(e)]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121670 P552912] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121674 P552913] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121676 P552914] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121678 P552915] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121682 P552916] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121685 P552917] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121688 P552918] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121692 P552919] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102920 P528006] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102372 P527842] Hand specimen
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102377 P527844] Hand specimen
SL 191 (p. 19) Limestone. 300 yd S. of Loch of Burraland, Sullom, 4 miles N. of Brae, North Maven. 1" Sheet 130; 6" Shetland 24 S.E. (''Lst. Scot.,'' 1949, p. 175).
(S34955). A grey, fractured, crystalline limestone. Composed of strained calcite in grains 0.5–1.5 mm across, traversed by narrow shear zones in which calcite is triturated, and along which muscovite and chlorite are abundant. Yellow tourmaline occurs along thin shear-zones in good prisms, which have been fractured by later movement. Oxidized pyrite occurs mainly in or near shear-lines.
''Limestone with muscovite-chlorite-schist folia, coarse to medium-grained, granoblastic, foliated.''
== Dalradian ==
=== Ballachulish Limestone ===
==== Inverness ====
SL 85 (p. 20) Ballachulish Limestone. Old Quarry, Creag Aoil, Torlundy. 1" Sheet 62; 6" Inverness. 140 S.W. (''Lst. Scot.,'' 1949, p. 113).
(S34480). Recrystallized limestone composed of interlocking grains (0.4 — 3mm) of closely twinned calcite, abundant accessory quartz forming small (0.1mm) grains enclosed in calcite, and accessory biotite and muscovite.
''Limestone with some quartz, coarse-grained, granoblastic, slightly sheared.''
SL 229 (p. 20) Ballachulish Limestone. Quarry, 300 yd N.N.W. of Tom an Aoil, Spean Bridge. 1" Sheet 62; 6" Inverness. 141 N.W. (''Lst. Scot.,'' 1949, p. 113).
(S35178). A grey, crystalline limestone. Composed of a mosaic of equidimensional grains of closely twinned calcite, 0.4–1.0 mm across, between which small idioblastic quartz grains, about 0.1 mm across, are scattered. The quartz grains occasionally appear within the calcite grains. Mineral dust and granules of pyrite, rutile and possibly graphite granules are peppered sparsely and uniformly through the rock.
''Limestone with some quartz, medium-grained, granoblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=326919 S34955]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121695 P552920] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121696 P552921] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102924 P528007] Thin section
SL 230 (p. 20) Ballachulish Limestone. S. bank of R. Spean, 350 yd above railway bridge, Spean Bridge. 1" Sheet 62; 6" Inverness. 141 N.W. (''Lst. Scot.,'' 1949, p. 113).
(S35179). Grey crystalline limestone. Composed of granular calcite of average grain 0.7 mm, which is greatly twinned. Small quartz and feld­spar grains, up to 0.1 mm across and of irregular but occasionally idio-blastic form, are scattered in small quantity between and within the calcite grains. Tiny opaque granules including pyrite are dusted irregularly through the calcite mosaic.
''Limestone with some quartz, medium-grained, granoblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=355073 S35179]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121857 P552974] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121860 P552975] Mag: 40 Light: XPL
=== Appin Limestone ===
==== Argyll ====
SL 86 (p. 20) Appin Limestone. Marble quarry, Gleann an Fhiodh, Ballachulish. 1" Sheet 53; 6" Argyll. 30 S.E.
(S34481). Fine-grained quartz-albite-granulite, with abundant calcite, accessory dolomite, rutile, apatite and muscovite. The portion from which the rock section has been made is much poorer in lime than is shown by chemical analysis from the bulk of the rock.
''Calcareous quartz-albite-granulite.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=366773 S34481]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120617 P552552] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120620 P552553] Mag: 40 Light: XPL
SL 87 (p. 20) Appin Limestone. Crag S. of road bend, E. of Duror station. 1" Sheet 53; 6" Argyll. 43 S.E. (''Lst. Scot.,'' 1941, p. 56).
(S34482). Granular dolomite of fine grain, 0.05 to 0.1 mm, containing subordinate quartz and albite-oligoclase, which are abundant in streaks, and accessory muscovite and pyrite.
''Dolomite with quartz, feldspar and muscovite, varigrained, foliated and grain-foliated.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=366774 S34482]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120623 P552554] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120627 P552555] Mag: 40 Light: XPL
==== Inverness ====
SL 35 (p. 20) Appin Limestone. Onich Limestone Quarry, North Ballachulish. 1" Sheet 53; 6" Inverness. 166 N.W.
Sample of crushed lime.
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102248 P527808] Hand specimen
=== Lismore Limestone ===
==== Argyll ====
SL 88 (p. 21) Lismore Limestone. Quarry just N. of Port Ramsay. 1" Sheet 45; 6" Argyll. 56 S.E. (''Lst. Scot.,'' 1949, p. 56).
(S34483). A dark grey, rudely flaggy limestone with a set of rectangular narrow calcite veins normal to the flag. Composed essentially of elong­ated grains of calcite darkened with dust, possibly graphitic, and con­taining subordinate alkali-feldspar and quartz. The calcite is of varying grain-size reaching 0.5 mm in length and is elongated parallel to the flagginess. A subordinate proportion of the calcite shows biaxiality. Apatite and tourmaline are accessory. Pyrite is common in euhedral crystals reaching 2 mm across.
''Limestone, fine-grained, granoschistose.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=370320 S34483]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120631 P552556] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120633 P552557] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120635 P552558] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120638 P552559] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120641 P552560] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120645 P552561] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102736 P527937] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102311 P527824] Hand specimen
=== Islay Limestone ===
==== Argyll ====
SL 129 (p. 21) Islay Limestone. Leorin Quarry, 2⅛ miles N. by W. of Port Ellen, Islay. 1" Sheet 19; 6" Argyll. 231 N.E. (''Lst. Scot.,'' 1949, p. 57).
(S34577). Grey fine-grained limestone, laminated and cut by lines of calcite. Composed of schistose granular calcite, 0.05 mm grain, the schistosity being marked by elongation of the calcite grains, by trains of opaque dark mineral matter and by occasional elongated grains of quartz. Laminae of coarser granular calcite, 0.3 mm grain, appear parallel to the schistosity and show ellipsoidal swellings which occasionally contain large turbid grains of calcite with undulose extinction. These coarser laminae pass without change of the type of calcite into cross-cutting veins. Granular quartz occurs in the coarser laminae and idiomorplaic quartz in the veins. It seems likely that the coarse laminae were recrystallized at the time of the cross-cutting veins by permeation of the solutions along lines of weakness, perhaps produced by the presence of relict augen of coarser calcite.
''Limestone, fine-grained, granoschistose, grain-foliated.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=374889 S34577]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121177 P552748] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121178 P552749] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102788 P527963] Thin section
SL 130 (p. 21) Islay Limestone. Lower Cragabus Quarry, 2¼ miles W. of Port Ellen, Islay. 1" Sheet 19; 6" Argyll. 231 S.E. (''Lst Scot.,'' 1949, p. 57; where the reference number is misprinted as SL 100).
(S34578). Fine-grained, grey crystalline limestone. Composed of granular calcite of irregular shape and size ranging from 0.01 to 0.4 mm and often with diffuse boundaries between neighbouring grains. Bedding is roughly marked by slightly greater and less concentration of opaque, black finely divided material which is mainly soluble in strong HCl and therefore must be largely iron oxides or sulphides. The insoluble residue consists mainly of quartz with an impregnation of black dust.
''Limestone, fine-grained, grain-foliated.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=374902 S34578]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121183 P552750] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121186 P552751] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102790 P527964] Thin section
SL 131 (p. 21) Islay Limestone. Islay Estates Quarry, Bridgend, Islay. 1" Sheet 27; 6" Argyll. 208 N.E. (''Lst. Scot.,'' 1949, p. 57).
(S34579). Pale grey, compact crystalline limestone, cut by thin calcite veins. Composed of elongated grains of calcite 0.2 to 0.6 mm, with marked parallel orientation. Thin veins of coarser calcite cut across the schistosity. The vein calcite is intercrystallized with the rock calcite. A little opaque material, mainly pyrite, and some quartz are dusted through the rock.
''Limestone, fine-grained, granoschistose.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=377579 S34579]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121189 P552752] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121190 P552753] Mag: 40 Light: XPL
SL 132 (p. 21) Islay Limestone. In angle of main road and Persabus road, ¾ mile W.S.W. of Port Askaig. 1" Sheet 27; 6" Argyll. 198 N.E. (''Lst. Scot.,'' 1949, p. 57).
(S34580). Grey compact and crystalline banded limestone which seems to have a poor cleavage at a low angle to the banding. Numerous patches and wisps, often contorted but with a general parallel orientation, of dark, very fine-grained limestone in a recrystallized granular base of calcite, illustrate palimpsest structure. The grain of the base is about 0.03–04 mm and small crystals of albite, about 0.1 mm across, are scattered through it. Small crystals and grains of pyrite appear in both the dark patches and the base.
''Limestone, fine-grained foliated, palimpsest.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=377892 S34580]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121197 P552755] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121195 P552754] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102793 P527965] Thin section
=== Tayvallich Limestones ===
==== Argyll ====
SL 123 (p. 21) Tayvallich Limestone. Roadside quarry, 1 mile N. of Kilchrenan. 1" Sheet 45; 6" Argyll. 112 N.E. (''Lst. Scot.,'' 1949, p. 55).
(S34571). Grey limestone, laminated lighter and darker grey. Composed of calcite, subordinate quartz and micaceous carbonaceous films. The quartz is mostly in large composite grains, or aggregates of smaller grains, associated with granular calcite of about 1.0 mm grain-size. The quartz and this type of calcite, which is brownish and highly cleaved, form ellipsoidal nodules, or less regular lenticular aggregates round which sweep laminae composed of more fine-grained calcite, about 0.1 mm grain size, and streaked with carbonaceous matter. Small grains of quartz occur also in this matrix.
''Limestone with quartz, coarse to fine-grained, granoschistose and grain-foliated.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=370321 S34571]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121140 P552736] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121142 P552737] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102772 P527955] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102260 P527811] Hand specimen
SL 125 (p. 22) Tayvallich Limestone. Quarry 270 yd S.E. of Baluachraig, 1¼ miles S. by W. of Kilmartin. 1" Sheet 36; 6" Argyll. 149 S.E. (''Lst. Scot.,'' 1949, p. 55).
(S34573). Dark grey, moderately crystalline limestone, containing numerous pebbles of vitreous quartz, pink feldspar and dark red material. In section, irregular areas of brownish oolite are seen to pass into a mosaic of clearer recrystallized calcite. Grains and aggregates of quartz and rounded crystals of microcline reaching 3.0 mm in length are numerous. The dark red pebbles appear to be microcline with much haematitic impregnation. The quartz probably originated as pebble grains, but shows considerable recrystallization. This can be observed as rims of regrowth, the old outline being marked by a zone of fine mineral matter, by intercrystallization of the grains among the new calcite and by partial inclusion of broken ooliths in quartz. The feldspars appear to have been pebbles in the oolitic limestone but are now bordered by a thin zone of recrystallized calcite where contact with oolitic rock would be expected. It may be invaded by calcite tongues and permeation aggre­gates of limonite and calcite. A little muscovite and albite, probably detrital, are present. Carbonaceous granules are disseminated in parts of the oolitic rock, trains of them being cut off against recrystallized calcite. Carbonaceous matter also occurs in streaks along small and irregular slip traces.
''Limestone with pebbly quartz and microcline, blastopsephitic, blasto-oolitic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=379156 S34573]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121153 P552740] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121155 P552741] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102774 P527956] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102782 P527960] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102252 P527809] Hand specimen
SL 126 (p. 22) Tayvallich Limestone. Fincharn Quarry, at S. end of Loch Awe. 1" Sheet 37; 6" Argyll. 139 N.W. (''Lst. Scot.,'' 1949, p. 55).
(S34574). Dark grey sparkling limestone, of medium grain, containing small aggregates of white calcite. Composed of granular dusty calcite, 0.4 mm grain, partially recrystallized to clear calcite, forming lenticular aggregates in a finer-grained rock, of mixed dusty and clear calcite grains 0.1 mm, showing foliation which curves round the lenticles. The foli­ation is shown by elongation of grains and by alternation of coarser and finer laminae with streaks of carbonaceous matter. Quartz occurs as an essential but subordinate constituent, as large grains partly recrystallized along with calcite, sometimes showing regrowth rims, partly as lenticular aggregates of smaller grains, and to a subordinate extent interstitial in the coarser dusty limestone.
''Limestone with some quartz, grain foliated and granoschistose.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=379450 S34574]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121157 P552742] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121161 P552743] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102780 P527959] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102776 P527957] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102778 P527958] Thin section
SL 127 (p. 22) Tayvallich Limestone. Quarry E. of Eurach, near Ford. 1" Sheet 37; 6" Argyll. 138 S.E.
(S34575). Dark grey, fine-grained crystalline limestone. The section shows irregular, diffuse relics of very fine-grained black-powdered limestone, in a recrystallized base of granular brownish calcite, among which small grains and aggregates of quartz are scattered. The form of the quartz indicates recrystallization. Black dust, graphitic or carbon­aceous, and granules are distributed through the recrystallized calcite. One recrystallized oolith was observed and in one place the rock is oophasmic.
''Limestone with some quartz, varigrained, partly granoblastic, oophasmic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=379451 S34575]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121165 P552744] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121166 P552745] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102784 P527961] Thin section
SL 133 (p. 22) Tayvallich Limestone. Cairnban Locks, Crinan Canal. 1" Sheet 36;6" Argyll. 160 N.E.
(S34581). Moderately coarse, pale grey, crystalline, gritty limestone, abundantly speckled with dark vitreous quartz grains. Composed of granular calcite forming a schistose matrix to numerous quartz and feldspar pebbles. Schistosity is marked by elongation of many calcite grains (up to 0.5 mm in length) and by streaks of dark matter, possibly carbonaceous. The pebbles include quartz, strained quartzite or com­posite quartz-blebs from granite, microcline, albite, perthite, and micro-pegmatite from granophyre. The quartz shows marginal granulitization and the margins, where not granulitized, are intercrystallized with the calcite. Much granulitic quartz among the calcite is evidently a crystal­lization of the same period as the latter. An albite pebble shows mar­ginal regrowth. A little white mica is associated with feldspar.
''Limestone with quartz and feldspar, blastopsephitic, granoblastic to granoschistose.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=379157 S34581]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121204 P552757] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121200 P552756] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102795 P527966] Thin section
=== Shira Limestone ===
==== Argyll ====
SL 124 (p. 22) Shira Limestone. Turnalt Quarry. 1" Sheet 36; 6" Argyll. 130 S.E. (''Lst. Scot.,'' 1949, p. 55).
(S34572). Dull grey, compact, but irregularly jointed limestone. Composed of granular calcite (0.05–0.14mm grain-size) and subordinate quartz and water-clear alkali-feldspar (0.1 mm grain). The grains have a tendency to be elongated parallel to a plane not recognizable in hand specimen. All minerals are recrystallized, but not to a high degree. Calcite-filled cracks cut steeply across the direction of elongation. Some thin streaks of turbid amorphous materials are present.
''Limestone with quartz and feldspar, fine-grained, granoschistose.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=379155 S34572]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121147 P552738] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121150 P552739] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102303 P527822] Hand specimen
=== Loch Tay Limestone ===
==== Argyll ====
SL 128 (p. 22) Loch Tay Limestone. Askomill Quarry, ½ mile E.N.E. of Campbeltown. 1" Sheet 12; 6" Argyll. 258 N.W. (''Lst. Scot.,'' 1949, p. 54).
(S34576). Banded coarse- and fine-grained limestone. The coarse bands which show curved cleavage surfaces of blackish clacite are in thin section composed of large irregular grains of calcite with patchy and undulose extinction. The finer-grained bands are composed of grains of calcite of irregular size and shape, very numerous clear and dust-impregnated grains of albite, 0.1 mm, and abundant opaque granular material sometimes recognizable as pyrite. Quartz and potash-feldspar are also present. Scattered grains of feldspar and opaque granules occur also in the coarse-grained bands. The black residue from digestion in concentrated HCl is mainly dust-impregnated albite and shapeless black grains, many of which are pyrite. On prolonged roasting in a crucible the residue becomes pale grey and the discharge of colour indicates that much carbon is present.
''Limestone with albite, foliated and grain-foliated, heteroblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=346309 S34576]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121173 P552747] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121170 P552746] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102786 P527962] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102256 P527810] Hand specimen
SL 134 (p. 23) Loch Tay Limestone. 400 yd S.W. of Glensluan Cottage, 1 mile S. of Strachur. 1" Sheet 37; 6" Argyll. 141 S.W. (''Lst. Scot.,'' 1949, p. 54).
(S34582). Grey crystalline sparkling limestone. Composed of elongated twinned and cleaved grains of calcite 1.0 mm and over in length, of lens shape and arranged with the long axes in one plane. Small grains and aggregates of quartz, 0.5 mm across, and flakes of muscovite, sometimes with bent detrital appearance, are numerous and plagioclase feldspar grains are scarce. Opaque grains and granules of pyrite and probably carbon are numerous.
''Limestone with quartz and muscovite, medium-grained, granoschistose.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=379452 S34582]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121209 P552759] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121206 P552758] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102799 P527967] Thin section
SL 147 (p. 23) Loch Tay Limestone. Quarry 1300 yd E. by S. of Ronachan House, West Loch Tarbert. 1" Sheet 20; 6" Argyll. 224 N.W. (''Lst. Scot.,'' 1949, p. 54).
(S34649). Sparkling grey medium-grained limestone. Composed of granular calcite of varying grain up to 2 mm, with scattered small quartz and albite grains and muscovite flakes. Some less limy bands are corn-posed of granulitic quartz and albite and irregularly prismatic crystals of clinozoisite cemented by granular calcite. The clinozoisite is charged with black powder (possibly carbon) and encloses also grains of pyrite. Pyrite occurs in large irregular grains, particularly in the quartz-feldspar bands of the rock, but is also present in small grains in the pure car­bonate.
''Limestone with quartz, albite, muscovite and clinozoisite, heteroblastic, foliated.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=403820 S34649]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121362 P552810] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121365 P552811] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102825 P527978] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102343 P527832] Hand specimen
GS2 (p. 23) Loch Tay Limestone. 750 yd N. of Glendaruel House. 1" Sheet 29; 6" Argyll. 162 S.W. (''Lst. Scot.,'' 1949, p. 54). (Anal. G. A. Sergeant).
(S35996). Marmorized limestone with white mica, quartz and albite. Composed of elongated crystals of calcite, granulitized and arranged with their long axes parallel, and showing composite lamellar twinning; grain-size varying from 0.5–1.0 mm. The white mica occurs in"flakes up to 0.4 mm long, either distributed among the calcite or concentrated into streaks and bands. Quartz and albite reaching 0.5 mm in size but generally about 0.2 mm across, are abundant. Graphite is associated with muscovite and albite. Iron ore occurs fairly plentifully in aggregates or fine disseminations as pyrite, or oxidized to limonite or leucoxene.
''Limestone with quartz, albite and muscovite, granoschistose, foliated.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=378538 S35996]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122282 P553123] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122278 P553122] Mag: 40 Light: PPL
==== Perth ====
SL 1 (p. 23) Loch Tay Limestone. Old quarry 550 yd W. of Dalveich Farm, Loch Earn. 1" Sheet 46; 6" Perth. 92 N.W. ''(Lst. Scot.,''1949, pp. 155–6).
(S34426). Dark grey, saccharoidal, crystalne limestone with broadly spaced micaceous laminae. Composed of twinned calcite grains up to 1.5 mm long, subordinate quartz, accessory graphite, iron ore (probably pyrite), colourless and pale brown micas and occasional large plates and small particle-filled grains of albite-oligoclase. Trains of graphite and elongation of calcite grains show some degree of schistosity.
''Limestone with quartz, albite and micas, heteroblastic, granoschistose.''
(S34427). Dark grey and white mottled schistose limestone with mica­ceous partings producing a thinly flaggy fracture. Composed of elon­gated grains of calcite, up to 3 mm long, sieved with quartz, albite and opaque granules, foliated with granoblastic, clean calcite of about 0.5 mm grain. Quartz and albite are abundant along laminae of white mica. Some pyrite is present, and possibly graphite also.
''Limestone with quartz, albite and muscovite, granoschistose, heteroblastic, grain-foliated.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=269173 S34426]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120206 P552415] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120207 P552416] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102687 P527924] Thin section
SL 2 (p. 23) Loch Tay Limestone. Old quarry above Craignavie, ¾ mile W.S.W. of Bridge of Dochart, Killin. 1" Sheet 46; 6" Perth. 80 N.W. (''Lst. Scot.,'' 1949, p. 155).
(S34428). Pale grey, saccharoidal limestones composed of moderately coarsely granular twinned calcite, 0.5–1.0 mm grain, abundant quartz, albite, white and brown mica, graphite and iron ore (pyrite).
''Limestone with quartz, albite and muscovite, medium-grained, grano-blastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=269175 S34428]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120213 P552418] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120212 P552417] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102279 P527816] Hand specimen
SL 3 (p. 23) Loch Tay Limestone. East face, Dunbeag, Killin. 1" Sheet 46; 6" Perth. 80 N.W. (''Lst. Scot.,'' 1949, p. 155).
(S34429). Grey crystalline limestone composed of grains of closely twinned calcite, 2 to 0.5 mm grain, subordinate quartz and alkali-feldspars in nests with which graphite is associated. Zoisite is present locally, yellowish mica and a serpentinous mineral are accessory. One large grain, 1 mm across, of alkali-feldspar occurs in the slice and there is some pyrite and a little limonite.
''Limestone with quartz, albite, muscovite and zoisite, medium-grained, heteroblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=269176 S34429]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120220 P552420] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102690 P527925] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120217 P552419] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102287 P527818] Hand specimen
SL 5 (p. 24) Loch Tay Limestone. Quarry at back of Clunie Cottage, 1 mile W. of Pitlochry. 1" Sheet 55; 6" Perth. 40 N.W. (''Lst. Scot.,'' 1949, p. 155)
(S34431). Grey crystalline limestone with micaceous partings; com­posed of equigranular calcite, 1 mm grain, and subordinate quartz, oligoclase and white mica. Accessory pyrite, a prismatic mineral which is probably zoisite, sphene and possibly some graphite are present. ''Limestone with quartz, oligoclase and muscovite, medium-grained, heteroblastic.''
SL 137 (p. 24) Loch Tay Limestone. Quarry, West Craig of Soilzarie, 3 miles E. of Kirkmichael. 1" Sheet 56; 6" Perth. 33 S.W. (''Lst. Scot.,'' 1949, p. 154).
(S34623). Pale bluish-grey, crystalline limestone. Composed of inter­locking grains of twinned calcite (0.5–2.0 mm) with a small quantity of iron-stained chloritic material, and grains of quartz and albite scattered sparsely through the rock. Black granules, possibly of iron ore, are disseminated uniformly, but in small quantity.
''Limestone, medium to coarse-grained, granoblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=283022 S34623]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121301 P552789] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121298 P552788] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102816 P527974] Thin section
SL 138 (p. 24) Loch Tay Limestone. 1250 yd E. by S. of Dunie, 1 mile S.E. of Kirkmichael. 1" Sheet 56; 6" Perth. 32 S.E. (''Lst. Scot.,'' 1949, p. 154)
(S34624). Pale bluish-grey medium-grained limestone, discoloured along some bands by yellowish oxidized iron ore. Composed of interlocking grains of calcite (0.3–1.0 mm) among which a few quartz and albite grains (probably recrystallized) are distributed. Specks of black material are abundantly disseminated and are aggregated in scattered clots along with limonite and yellowish isotropic chloritic material. Flakes of muscovite and grains and prisms of apatite are accessory.
''Limestone, medium-grained, granoblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=283023 S34624]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121304 P552790] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121306 P552791] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102818 P527975] Thin section
=== Blair Atholl Limestone ===
==== Perth ====
SL 4 (p. 24) Blair Atholl Limestone. Quarry north of White Bridge, 3 ½ miles S. by E. of Tummel Bridge. 1" Sheet 55; 6" Perth. 38 S.E. (''Lst. Scot.,'' 1949, p. 158).
(S34430). Bluish-grey schistose limestone of fine grain with abundant quartz and mica. Schistosity is marked by the elongation of closely twinned calcite and the attitude of mica flakes, and quartz, alkali-feldspar and white mica are concentrated in lenticles parallel to this direction. The calcite grains reach 3 mm in length by 0.8 mm width. The feldspar is turbid and is probably albite. Some pyrite, a little sphene and apatite and possibly graphite are also present.
''Limestone with quartz, alkali feldspar and muscovite, coarse-grained, granoschistose, foliated.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=261994 S34430(a)]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120223 P552421] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120225 P552422] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120230 P552423] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120233 P552424] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120235 P552425] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120237 P552426] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102692 P527926] Thin section
SL 11 (p. 24) Blair Atholl Limestone. Upper Strathgroy Quarry, 11 miles E. of Blair Atholl. 1" Sheet 55; 6" Perth. 21 S.E. (''Lst. Scot.,'' 1949, p. 158).
(S34497). A dove-grey, medium-grained limestone composed of inter­locking grains of closely twinned calcite, about 1 mm grain-size, contain­ing numerous small grains of quartz, 0.1 mm across, at the junctions of the calcite grains. Phlogopite, zoisite and sphene are accessory.
''Limestone with quartz and cak-silicates, medium-grained, granoblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=262000 S34497]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=208456 P552592] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120711 P552593] Mag: 40 Light: XPL
SL 12 (p. 24) Blair Atholl Limestone. 480 yd S.S.W. of Shierglass, 1 mile S.E. of Blair Atholl. 1" Sheet 55; 6" Perth. 30 N.E. (''Lst. Scot.,'' 1949, p. 157)
(S34498). A dove-grey, medium-grained limestone composed of inter­locking grains of closely-twinned calcite of varying size (about 0.25­–1.0 mm) with a little colourless mica, quartz and scarce turbid alkali-feldspar; accessory pyrite, graphite, limonite, and sphene.
''Limestone with quartz and muscovite, medium-grained, granoblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=262001 S34498]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120717 P552595] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120714 P552594] Mag: 40 Light: PPL
SL 139 (p. 25) Blair Atholl Limestone. Gleann Beag ⅔ mile S.S.W. of Devil's Elbow.1" Sheet 65; 6" Perth. 15 N.W. (''Lst. Scot.,'' 1949, p. 157).
(S34625). Dove-grey limestone of medium grain. Composed of inter­locking grains of twinned calcite (0.5–1.5 mm) arranged with slight elongation parallel to a single plane. Grains of quartz, often containing many black granules, and flakes of muscovite are uniformly but not very abundantly scattered through the rock. A few grains and many small granules of ore are disseminated throughout.
''Limestone with some quartz and muscovite, medium-grained, granoblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=262728 S34625]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121310 P552792] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121311 P552793] Mag: 40 Light: XPL
=== Limestone, Sandend Group ===
==== Aberdeen ====
SL 71 (p. 25) Limestone, Sandend Group. Blackhillock Quarry, ¾ mile S. of Coachford and about 5 miles N.W. of Huntly. 1" Sheet 86; 6" Aberdeen. 16 S.E. (''Lst. Scot.,'' 1949, p. 48).
(S34511). Grey crystalline limestone with dark micaceous partings. Composed of twinned granular calcite in interdigitating grains of vary­ing size, 0.1 to 2 mm, the larger being elongated along the schistosity. Quartz, muscovite and chlorite are subordinate, and opacite including pyrite, leucoxene and perhaps graphite, accessory. The quartz is dis­tributed as individual grains and as lenticles, the other constituents usually in contorted films swelling in-places to small nests.
''Limestone with quartz, muscovite and chlorite, medium-grained, grano-schistose, foliated.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=274494 S34511]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120771 P552613] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120769 P552612] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102744 P527941] Thin section
==== Banff ====
SL 68 (p. 25) Limestone, Sandend Group. Blackhillock Quarry, 1½ miles S. by E. of. Keith. 1" Sheet 85; 6" Banff. 20 N.W. (''Lst. Scot.,'' 1949, p. 79)
(S34508). Mottled grey and white crystalline limestone, composed of large grains of calcite, 1 to 2 mm across, curvedly twinned. Quartz is accessory, and muscovite and opaque dust are scarce.
''Limestone with quartz, coarse-grained, granoblastic, strained.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=285189 S34508]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120750 P552606] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120753 P552607] Mag: 40 Light: XPL
SL 70 Limestone, Sandend Group. Parkmore Quarry, !I mile N.E. of Dufftown. (p. 25) 1" Sheet 85; 6" Banff. 25 N.W. (''Lst. Scot.,'' 1949, p. 80).
(S34510). Pale grey crystalline limestone, with veins of coarse white, curvedly twinned calcite. Composed of sutured and locally granulitized grains of calcite with close curved twinning, 0.5–2 mm grain, traversed by lines of granulation. Quartz, muscovite and opaque, black, white and yellow granules are accessory.
''Limestone with quartz, coarse-grained, granoblastic, strained.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=285190 S34510]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120761 P552610] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120766 P552611] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102196 P527795] Hand specimen
SL 72 (p. 25) Limestone, Sandend Group. Hillockhead Quarry, 2 ½ miles W. by S. of Keith. 1" Sheet 85; 6" Banff. 13 S.E. (''Lst. Scot.,'' 1949, p. 78)
(S34512). Dove-grey, medium-grained crystalline limestone composed of interlocking grains of closely twinned calcite, 0.5 to 2 mm grain, with numerous small quartz grains at the junctions of the calcite grains. Locally large grains of quartz are elongated along the foliation. Muscovite is a subordinate mineral. Sphene, apatite and graphite are accessory; zoistic epidote is present in some laminae.
''Limestone with quartz, muscovite and zoisite, coarse-grained, granoblastic, foliated.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=285191 S34512]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120774 P552614] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120777 P552615] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120780 P552616] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120783 P552617] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120787 P552618] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102746 P527942] Thin section
SL 73 (p. 25) Limestone, Sandend Group. Drumrnuir Quarry, 1¼ miles N.N.E. of Drummuir station. 1" Sheet 85; 6" Banff. 19 S.E. (''Lst. Scot.,'' 1949, p. 79).
(S34513). Pale grey crystalline limestone, with thin veins of calcite. It is composed of curvedly twinned calcite of grain 0.5 to 3 mm, which is recrystallized in small clear grains along narrow fracture zones. Quartz is accessory.
''Limestone, coarse-grained, granoblastic, strained.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=285192 S34513]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120793 P552620] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120788 P552619] Mag: 40 Light: PPL
SL 74 (p. 26) Limestone, Sandend Group. Craibstone Quarry, 12 miles S. of Kirkton of Deskford. 1" Sheet 96; 6" Banff. 8 N.E. (''Lst. Scot.,'' 1949, p. 78)
(S34514). Mottled grey and white limestone with wavy, dark laminae. It is composed of brecciated sheared limestone, recemented by vein calcite, in which quartz is present in small quantity and muscovite accessory. Graphite is present in the dark laminae.
''Limestone with some quartz, sheared.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=277931 S34514]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120799 P552622] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120795 P552621] Mag: 40 Light: PPL
SL 76 (p. 26) Limestone, Sandend Group. Craig Chailceach (Craighaulkie) Quarry 1 mile W.N.W. of Tomintoul. 1" Sheet 75; 6" Banff. 40 S.W. (''Lst., Scot.,'' 1949, p. 80).
(S34516). Grey medium-grained crystalline limestone composed of interlocking grains of calcite, about 1.5 mm across, with abundant accessory quartz in small grains, 0.05 mm diameter. Muscovite, pyrite, black opaque granules and sphene are accessory.
''Limestone with quartz, medium-grained, heteroblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=268326 S34516]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120810 P552626] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120806 P552625] Mag: 40 Light: PPL
SL 75 (p. 26) Limestone, Sandend Group. Quarry, Rinaitin, Glen Rinnes. 1" Sheet 85; 6" Banff. 30 S.E. (''Lst. Scot.,'' 1949, p. 80).
(S34515). Banded pale and dark grey, crystalline limestone with mica­ceous films. Composed of elongated grains of calcite, up to 3 mm in length, showing a close, curved twinning and traversed by fracture veins in which both calcite and dolomite are present. Quartz is accessory as small grains enclosed in calcite. In the darker bands the calcite grains are enveloped by black graphitic and pyritous dust. Micas, partly chloritized, are present but scarce.
''Limestone, dolomitic, with some quartz, granoschistose, sheared.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=285193 S34515]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120804 P552624] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120802 P552623] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102748 P527943] Thin section
SL 238 (p. 26) Limestone, Sandend Group. Glenisla Quarry, Keith. 1" Sheet 85; 6" Banff. 14 S.W. (''Lst. Scot.,'' 1949, p. 78).
(S35271). Grey foliated crystalline limestone of medium grain. The twinned interlocking calcite grains of which the rock is composed are elongated in the plane of foliation and reach 4 mm in length. Quartz is present as a subordinate mineral and forms grains, often with crystal faces, usually about 0.3 mm but up to 0.5 mm across. The content of quartz is about 5–7 per cent, but is variable. Opaque black and yellow granular matter is also present and is certainly in part pyrite, but perhaps includes graphite. Muscovite and phlogopite are accessory; alkali-feldspar scarce.
''Limestone with quartz and micas, coarse-grained, granoschistose.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=285196 S35271]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121980 P553015] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121976 P553014] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=103017 P528029] Thin section
SL 239 (p. 26) Limestone, Sandend Group. Richmond Quarry, Dufftown. 1" Sheet 85; 6" Banff. 25 S.W. (''Lst. Scot.,'' 1949, p. 80).
(S35272). Grey crystalline limestone, composed of closely twinned interlocking and often sutured grains of calcite, about 1.5 mm across, and subordinate quartz forming not more than 5 per cent, except in small pockets. The quartz grains reach up to 01 mm across. There are a little accessory opaque dust and scarce drops of sphene.
''Limestone with quartz, coarse grained, granoblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=285197 S35272]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121982 P553016] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121984 P553017] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102420 P527857] Hand specimen
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102416 P527856] Hand specimen
=== Limestone, Portsoy Group ===
==== Aberdeen ====
SL 240 (p. 26) Limestone, Portsoy Group. Broadland Quarry, between Drumdelgie and Broadland, 3¼ miles W.N.W. of Huntly. 1" Sheet 86; 6" Aberdeen. 25 N.E. (''Lst. Scot.,'' 1949, p. 48).
(S35273). Dark grey crystalline limestone, composed of calcite of varying grain, ranging from 3.0–0.5 mm across, and elongated in the foliation planes, with rather intricate interlocking between the calcite grains and between calcite and quartz. Quartz is present in subordinate amount (fully 5 per cent by eye estimation), in grains ranging from 0.5 to fully 2.0 mm in length. The large grains are intergrown with calcite. Phlogopite and opaque grains, which include pyrite, are abundant accessories.
''Limestone with quartz, coarse- to medium-grained, granoschistose and grain-foliated.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=274500 S35273]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121988 P553018] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121990 P553019] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=103022 P528030] Thin section
==== Banff ====
SL 67 Limestone, Portsoy Group. Limehillock Quarry, 11 miles N.E. of Grange (p. 27) station. 1" Sheet 86; 6" Banff. 15 S.W. (''Lst. Scot.,'' 1949, p. 80)
(S34507). Dove-grey crystalline limestone, composed of equidimensional, 0.5 to 1 mm, grains of calcite, which are closely twinned. Quartz and muscovite are minor minerals, and pyrite and black granules accessory.
''Limestone with quartz and muscovite, heteroblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=274493 S34507]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120743 P552604] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120747 P552605] Mag: 40 Light: XPL
=== Boyne Limestone ===
==== Banff ====
SL 69 (p. 27) Boyne Limestone. Boyne Bay Quarry, 1½ miles E. of Portsoy. 1" Sheet 96; 6" Banff. 4 N.W. (''Lst. Scot.,'' 1949, p. 81).
(S34509). Grey-white crystalline limestone with dark laminae. Com­posed of granular twinned calcite, average grain 1 mm, with scarce accessory quartz and muscovite.
''Limestone, granoblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=277930 S34509]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120756 P552608] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120758 P552609] Mag: 40 Light: XPL
=== Deeside Limestone ===
==== Aberdeen ====
SL 77 (p. 27) Deeside Limestone. Deecastle Quarry, ¼ mile N.E. of Deecastle, 51 miles W. of Aboyne. 1" Sheet 66; 6" Aberdeen. 92 N.E. (''Lst. Scot.,'' 1949, p. 47).
(S34517). A banded, contact-altered calc-silicate rock composed of wollastonite, diopside, oligoclase, zoisite, epidote, prehnite and sphene.
''Wollastonite-rock.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=276380 S34517]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120813 P552627] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120815 P552628] Mag: 40 Light: XPL
SL 78 (p. 27) Deeside Limestone. Mains of Midstrath Quarry, 4 ½ miles E.S.E. of Aboyne. 1" Sheet 66; 6" Aberdeen. 93 N.E. (''Lst. Scot.,'' 1949, p. 47)
(S34518). Crystalline limestone composed of calcite, average grain 1.5 mm, with a subordinate, but considerable, content of calcic scapolite, diopside, orthoclase, albite and accessory tremolite, sphene, apatite and partly oxidized pyrite.
''Limestone with scapolite, diopside and feldspars, coarse-grained, granoblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=276381 S34518]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120821 P552630] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120820 P552629] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102331 P527829] Hand specimen
SL 79 (p. 27) Deeside Limestone. Gallowhill Wood Quarry. 1" Sheet 66; 6" Aberdeen. 93 N.B.
(S34519). Crystalline limestone composed of calcite, 0.5 to 1 mm grain, with subordinate scapolite (mizzonite) diopside and orthoclase; accessory sphene, tremolite and iron ore.
''Limestone with scapolite, diopside and feldspars, medium-grained, granoblastic.''
==== Kincardine ====
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=276382 S34519]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120829 P552632] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120824 P552631] Mag: 40 Light: PPL
SL 80 Deeside Limestone. Woodhead Quarry, 300 yd S. of Woodhead Farm, (p. 27) 1½ miles E.S.E. of Banchory. 1" Sheet 66; 6" Kincardine. N.S. 9 N.W. (''Lst. Scot.,'' 1949, p. 128).
(S34520). Grey crystalline limestone, 1 to 1.5 mm grain, composed of calcite with abundant but subordinate albite, andesine, hornblende, zoisite, and accessory quartz, biotite, sphene, chlorite, pyrite and apatite. ''Limestone with zoisite and feldspars, medium-grained, granoblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=276383 S34520]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120834 P552634] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120832 P552633] Mag: 40 Light: PPL
=== Grantown Limestone ===
==== Moray ====
SL 13 (p. 28) Grantown Limestone. 450 yd S.E. of Coldholme, Dulnain Bridge. 1" Sheet 74; 6" Moray (Elgin.) 32 S.E.
(S34499). Pale grey and yellowish grey banded, medium-grained crystalline limestone. Composed of granular calcite of varying grain, 0.2 to 3 mm, with bands rich in granular potash-feldspar, albite and de­composed plagioclase, together with numerous rounded and prismatic grains of diopside and tremolite and flakes of brown phlogopite. Apatite and sphene are accessory.
''Limestone with feldspars, diopside, tremolite and phlogopite, foliated, granoblastic.''
(S34500). As above, but plagioclase (oligoclase) is abundant. Diopside forms large ragged prisms. Pale brown phlogopite is an important constituent. Zoisite also is accessory.
''Limestone with feldspars, diopside, tremolite and phlogopite, foliated, porphyroblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=284308 S34499]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120720 P552596] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120723 P552597] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102740 P527939] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102740 P527939] Thin section
=== Unclassified Dalradian ===
==== Aberdeen ====
SL 66 (p. 28) Metamorphic Limestone. Quarry at Ladyleys, E. of Old Meldrum. 1" Sheet 87; 6" Aberdeen. 46 N.W.
(S34505). Dark grey banded rock, effervescing with HCl only in some bands. In thin section a banded granulite (hornfels) containing biotite, pyroxene, epidote, calcite, calcic plagioclase, oligoclase and albite, with subordinate muscovite, colourless hornblende and accessory pyrite and sphene, in varying proportions in different bands.
''Calcareous calcsilicate-biotite-feldspar-granulite, foliated.''
(S34506). Grey limestone of impure type, composed of calcite of varying grain, 0.05 to 1 mm, partly granulitized, with subordinate pyroxene, hornblende, epidote, accessory pyrite, sphene and biotite, scattered grains of plagioclase and small nests of quartz.
''Limestone with calcsilicates and quartz, grain-foliated, granoschistose.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=277246 S34505]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120739 P552602] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120740 P552603] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102742 P527940] Thin section
SL 145 (p. 28) Metamorphic limestone. Old quarry 550 yd S.E. of Strichen station. 1" Sheet 87; 6" Aberdeen. 13 N.E.
(S34647). Grey, compact granulite with thin dull white limestone laminae. Composed of quartz and potash feldspar with alternate laminae rich in pale green tremolite and/or pyroxene. Biotite is abundant in ragged poikiloblastic plates in a few laminae. Sphene is usually an abundant accessory. Calcite is present both in quartz-feldspar laminae and in those rich in hornblende, but is confined to thin bands in the rock. Iron ore in irregular grains and aggregates is an abundant accessory.
''Calcareous quartz feldspar granulite with talc-silicates, foliated.''
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121350 P552806] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121354 P552807] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102821 P527976] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102339 P527831] Hand specimen
SL 146 (p. 28) Limestone. Old Quarry, ⅓ mile N. of Ardlethen. 1"Sheet 87; 6" Aberdeen. 38 S.W.
(S34648). Pale grey, fine-grained limestone with some thin calcite veins. Composed of a matrix of granular calcite (0.2–0-4 mm grain-size) con­taining a large number of phlogopite flakes and grains of diopside. The latter has a salite (001) cleavage in addition to the usual prismatic cleavage. The phlogopite flakes tend to be orientated parallel to one direction.
''Calcite-diopside-phlogopite rock, fine-grained, granoblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=277249 S34648]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121357 P552808] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121359 P552809] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102823 P527977] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102367 P527840] Hand specimen
GS3 (p. 28) Limestone. Most southerly quarry immediately E. of the road, 200 yd. S. of the school, 3 miles N.W. of Kirkton of Glenbucket. 1" Sheet 75; 6" Aberdeen. 60 N.W. (''Lst. Scot.,'' 1949, p. 48).
(S37487). Dove-grey crystalline limestone composed of interlocked, recrystallized calcite crystals up to 1.0 mm across and showing complex lamellar twinning. Granulitization occurs along ill-defined narrow bands. Small rounded quartz grains and white mica flakes are scattered through the rock. Pyrite and opaque black dust are accessory.
''Limestone with quartz and phlogopite, medium-grained, grain-foliated, in part granoschistose.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=268329 S37487]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122287 P553125] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122283 P553124] Mag: 40 Light: PPL
== Unclassified metamorphic ==
==== Inverness ====
SL 14 (p. 28) Kinlochlaggan Limestone. Quarry near Post Office, Kinlochlaggan. 1" Sheet 63; 6" Inverness. 115 S.E. (''Lst. Scot.,'' 1949, p. 114).
(S34501). Greyish white, coarsely crystalline limestone, composed of large (4 mm) irregularly interlocking, often sutured plates of twinned calcite containing small grains of oligoclase, quartz, tremolite and sulphide ore as accessory minerals.
''Limestone, coarse-grained, with peripheral granulation, diablastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=264853 S34501]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120726 P552598] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120729 P552599] Mag: 40 Light: XPL
SL 15 (p. 29) Limestone. Quarry N. of Loch an Eilean, 2¾ miles S. by E. of Aviemore. 1" Sheet 74; 6" Inverness. 73 S.E. (''Lst. Scot.,'' 1949, p. 115).
(S34502). Whitish grey, moderately coarsely crystalline limestone com­posed of interlocking grains of twinned calcite (1 to 2 mm) with numerous subordinate minerals including quartz, alkali-feldspar, tremolite and small, 0.01 mm, grains of zoisite. Sphene and apatite are accessory.
''Limestone with some quartz, feldspar and calcsilicates, coarse-grained, granoblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=284310 S34502]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120734 P552601] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120731 P552600] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102150 P527782] Hand specimen
SL 241 (p. 29) Limestone. Glenlia Quarry, near Foyers. 1" Sheet 73; 6" Inverness. 41 S.E.
(S35274). A dull, compact, grey, greenish and pinkish-mottled lime­stone. Composed essentially of calcite, calc-silicates, mica and feldspar, with accessory sphene. The calcite is in grains up to 0.5 mm across. The caic-silicates include zoisite, epidote, pyroxene, pale green tremo-lite, the total and relative abundance of which vary from place to place. The feldspar is chiefly potash-feldspar and shows microcline twinning occasionally. Some albite is also present. The mica is a brown phlogopite.
''Limestone with feldspathic calcsilicate folia, foliated, granoschistose.''
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121996 P553021] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121994 P553020] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=103025 P528031] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102440 P527862] Hand specimen
== Lower Cambrian ==
=== Fucoid Beds ===
==== Sutherland ====
M 2926 (p. 29) Dolomite limestone in fucoid shales. Near Chrudaidh, Kyle of Durness. 1" Sheet 114; 6" Sutherland 14 N.E. (Anal. W. Pollard, in '''The Geo­logical Structure of the North-West Highlands of Scotland'',' 1907, ''Mem. Geol. Surv.,'' p. 637).
(S8132). Dark red fine-grained, crystalline dolomite: composed of a matrix of granular dolomite, of grain ranging down from 0.2 mm to minutely crystalline, in which are set numerous echinodermal fragments and long, structureless pieces of single-crystal carbonate which may in some cases be algal in origin, together with brachiopod shell fragments and opacized, laminar, thin sections perhaps of trilobite carapace. Angular to subangular, ill-sorted grains of quartz, chalcedonic silica and alkali-feldspar, and granular aggregates of sericite and streaks of chert are common. Oolitic carbonate grains, yellow tourmaline and colourless zircon are accessory.
''Dolomite with quartz and chert, varigrained, zoichnic, clastichnic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=276666 S8132B]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122332 P553140] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122336 P553141] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122342 P553143] Mag: 40 Light: XPL
=== Durness Limestone: Group I (Ghrudaidh) ===
==== Sutherland ====
SL 269 (p. 29) Dolomite. N. side of Allt a' Chalda Mòr, about 500 yd E. 15° S. of Ardvreck Castle and about 1¼ miles N.N.W. of Inchnadamph Hotel. 1" Sheet 107; 6" Sutherland. 71 N.W. (''Lst. Scot.,'' 1949, p. 191. Note: the percentages of CaCO3 and of MgCO3 for SL 269 and SL 270 have been interchanged in error on p. 191).
Bulk sample.
== Cambro-Ordovician ==
=== Durness Limestone: Group II (Eilen Dubh) ===
==== Inverness. (Skye) ====
SL 252 (p. 29) Dolomite. Between road and shore, just N. of bridge, Ord. 1" Sheet 71; 6" Inverness. (Skye) 51 S.W. (''Lst. Scot.,'' 1949, p. 123; see also present memoir, p. 6).
(S35352). Grey compact dolomite, composed of interlocking grains or ill-formed rhombs of dolomite, 0.1–0.2 mm. across. The rock is traversed by very thin cracks which are filled with cherty silica, occasion­ally quartz, and lined with limonite or limonitic clay.
''Dolomite, medium-grained, mosaic, fractured.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=353403 S35352]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122053 P553040] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122057 P553041] Mag: 40 Light: XPL
==== Ross and Cromarty ====
SL 255 (p. 29) Dolomite. Roadside 680 yd S. of Tornapress Bridge, Kishorn. 1" Sheet 80; 6" Ross and Cromarty. 110 N.W. (''Lst. Scot.,'' 1949, p. 167)
(S35355). A pale, flesh-grey, compact dolomite with flinty fracture. It is traversed by thin cracks filled with white dolomite. In thin section the rock is seen to be composed of small grains of dolomite, 0.01–0.05 mm across, with veins and patches of coarser grain, up to 0.3 mm.
Quartz grains, 0.05 0.07 mm across, are numerous, but on the whole probably form less than 5 per cent by volume of the rock. There are occasional films of limonitic silt of stylolitic character.
''Dolomite, luteous, fine-grained, breccioid.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=271488 S35355]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122077 P553048] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122082 P553049] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84026 P531427] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102492 P527875] Hand specimen
SL 256 (p. 30) Dolomite. Cliff on shore of Loch Kishorn, 350 yd S.E. of Seafield. 1" Sheet 81; 6" Ross and Cromarty. 110 N.W. (''Lst. Scot.,'' 1949, p. 167)
(S35356). A dove-grey, compact, structureless dolomite. Composed of grains of dolomite of uniform size, 0.01–0.04 mm, among which small grains, 0.01 mm, of quartz are common and occasionally concentrated in short narrow streaks. The grains of the dolomite are a little coarser in narrow, interrupted, vein-like courses.
''Dolomite, luteous, micrograined, granular.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=271489 S35356]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122084 P553050] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122088 P553051] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102468 P527869] Hand specimen
==== Sutherland ====
SL 270 (p. 30) Dolomite. N. side of Allt a'Chalda Mix., about 500 yd E. 15° S. of Ardvreck Castle and about 1¼ miles N.W. of Inchnadamph Hotel. 1" Sheet 107; 6" Sutherland 71 N.W. (''Lst. Scot.,'' 1949, p. 191; see note on SL 269 above).
Bulk sample.
SL 272 (p. 30) Dolomite. Amhainn a'Chnocain. N. side of stream, about 720 yd upstream from road-bridge over stream S. of Elphin.
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=266767 S35797]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122131 P553066] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122136 P553067] Mag: 40 Light: XPL
SL 273 (p. 30) Dolomite. As preceding, about 770 yd upstream from the bridge.
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=276668 S8283]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122350 P553146] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122352 P553147] Mag: 40 Light: XPL
SL 274 (p. 30) Dolomite. As preceding, about 800–850 yd upstream from the bridge.
SL 272–4 (p. 30) Dolomite with some chert. Amhainn a'Chnocain; bulk sample from three preceding localities. 1" Sheet 101; 6" Sutherland 91 N.W. (''Lst. Scot.,'' 1949, p. 191).
(S35797). A bluish-white compact marble, traversed by thin fracture veins without definite direction. The thin section is composed of equidimensional grains of dolomite, 0.05–0.1 mm across, but is coarser (0.1–0.2 mm size) in patches. Narrow lines of trituration and iron staining traverse the rock and appear to be followed by nodular segrega­tions of cherty silica. Chert also forms irregular masses with which the coarser dolomite is sometimes associated, and the coarser crystallization of the dolomite and the aggregation of this chert both appear to be earlier than the fracturing of the rock.
''Dolomite with chert, fine-grained, granular.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=276664 S8130]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122323 P553137] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122321 P553136] Mag: 40 Light: PPL
M 2892 (p. 31) Dolomite. A'Choil-sgeir, near Eilean Hoan, Durness. 1" Sheet 114; 6" Sutherland 6 N.W. (Anal. W. Pollard, in '''The Geological Structure of the North-West Highlands of Scotland','' 1907, ''Mem. Geol. Surv.,'' p. 637).
(S8283). Pale reddish fine-grained dolomite composed of grains of dolomite, 0.05 to 0.2 mm across, with some ferruginous matter present in stylolitic films. An irregular network of healed fractures pervades the rock. Quartz occurs in thin veins some of which follow lines of fracture.
''Dolomite, fine-grained, mosaic, fractured.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=276665 S8131]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122328 P553139] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122326 P553138] Mag: 40 Light: PPL
M 2893 (p. 31) Dolomite. Eilean Hoan, 2½ miles E. of Durness. 1" Sheet 114; 6" Sutherland 6 N.W. (Anal. W. Pollard, in '''The Geological Structure of the North-West Highlands of Scotland','' 1907, ''Mem. Geol. Surv.,'' p. 637)
(S8130). Uniform, grey, moderately fine-grained dolomite; composed of interlocking grains, frequently rhomboid, of turbid dolomite, 0.2–0.3 mm across. This uniform mass is traversed by thin, impersistent films of ferruginous clay.
''Dolomite, medium-grained, mosaic.''
Dolomite. Eilean Hoan, 2.5 miles east of Durness. Sutherland. Uniform, grey, moderately fine-grained dolomite; composed of interlocking grains, frequently rhomboid, of turbid dolomite, 0.2 - 0.3 mm across. This uniform mass is traversed by thin, impersistent films of ferruginous clay. Dolomite, medium-grained, mosaic. M02893. Britrocks S8132B.
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=276666 S8132B]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122338 P553142] Mag: 40 Light: PPL
M 2900 (p. 31) Dolomite. Eilean Hoan, Durness. 1" Sheet 114; 6" Sutherland 6 N.W. (Anal. W. Pollard in '''The Geological Structure of the North-West High­lands of Scotland','' 1907, ''Mem. Geol. Surv.'' p. 637).
(S8131). Uniform, grey, fine-grained dolomite showing small red flecks; composed of interlocking grains of clear dolomite, 0.1 mm across, among which minor quantities of angular quartz, 0.05 mm average grain, and granules of red iron oxide are uniformly distributed.
''Dolomite, luteous, fine-grained, mosaic.''
SL 175 (p. 31) Dolomite. Stream 5/6 mile S. of Keoldale, about 75 yd upstream from road. 1" Sheet 114; 6" Sutherland 5 S.E. (''Lst. Scot.,'' 1949, p. 188).
The analyses were made on composite samples of which the four speci­mens described below are representative, but the proportions of the various types may have differed in the samples supplied for Anal. M 23799 and Anal. GS1203 respectively.
(S34842). A fine-grained, uniform dolomite of grain size about 0.1 mm. Local patches of coarser grain with occasional limonitic fillings along the cleavages occur. Stylolitic films of limonitic clay are present but scarce and there are traces of quartz.
''Dolomite, fine-grained, mosaic.''
(S34843). Bedded dolomite, with alternating laminae of 0.01 to 0.05 mm grain containing numerous streaky impregnations of limonite and occasional laminae of chert and ferruginous material. Small angular grains of quartz are numerous and the rock probably contains some clay.
''Dolomite, luteous, pelitomorphic to micrograined, taxichnic, thin-bedded.''
(S34844). Fine-grained, sandy dolomite with some bands of slightly coarser material; composed of grains of dolomite, about 0.03 mm average grain, with subordinate quartz and alkali-feldspar in angular grains up to 0.1 mm long, and some muscovite in small thin flakes. The rock is cut by thin veins of coarser dolomite.
''Dolomite, duteous to arenaceous, fine-grained, taxichnic, mosaic.''
(S34845). Dolomite of grain varying between 0.03 and 0.3 mm. There is a local cement of limonite which is only enough to form coatings to the dolomite grains. Limonite is present also along lines of fracture. The variation in grain-size is abrupt so that the rock has a brecciated or nodular appearance in hand specimen, but enclosure of limonitic dust trains in the large dolomite grains suggests that recrystallization to coarse dolomite is later than the fracturing of the rock. Chert occurs in sporadic vacuoles.
''Dolomite, varigrained, breccioid, mosaic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=276721 S34842]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121448 P552838] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121450 P552839] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102845 P527987] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102842 P527986] Thin section
SL 177 (p. 32) Dolomite. Hillside, 780 yd N.18°E. of Eireboll House and 330 yd W. of Free Church. 1" Sheet 114; 6" Sutherland 24 N.W. (''Lst. Scot.,'' 1949, p. 189). Composite samples.
(S34846). Very fine-grained dolomite of grain-size ranging down from 0.05 mm. The rock contains accessory grains of quartz and flakes of muscovite and is traversed by thin impersistent streaks of chert. ''Dolomite, micrograined, granular.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=276725 S34846]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121456 P552841] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121453 P552840] Mag: 40 Light: PPL
=== Durness Limestone: Group III (Sailmhor) ===
==== Sutherland ====
SL 176 (p. 32) Dolomite. Field about 350 yd S.S.W. of Sarsgrum, about 50 yd E. of the road. 1" Sheet 114; 6" Sutherland 5 S.E. (''Lst. Scot.,'' 1949, p. 187). The analyses were made on composite samples, the most prominent components of which are represented by the specimens described below; but the proportions of the various types may have differed somewhat in the samples supplied for Anal. M23800 and Anal. GS1202, respectively
(S34838). Crystalline dolomite of grain-size varying from 0.2–0.6 mm and of a slightly brown colour in transmitted light. The grains, are interlocking and mostly of irregular shape but a proportion of them show rhomboid outlines. Ferruginous clay locally forms impersistent, inter-granular films.
''Dolomite, medium-grained, mosaic.''
(S34839). A fine granular dolomite showing non-uniform distribution of grain-size. The slide includes parts with grain of about 0.1 mm, irregularly and transitionally mixed with coarser grained dolomite of about 0.4 mm grain-size. Ferruginous material is present in very small quantity as short films and intergranular pellicles.
''Dolomite, varigrained, breccioid, mosaic.''
(S34840). Dolomite of grain-size about 0.3 mm traversed by a diffuse network of coarser grained dolomite (0.6–1.5 mm). All of it has a brownish tint. A little chert is present in thin veins which seem to replace the dolomite, pieces of which are left optically continuous on the opposite sides of the veins. Some granular quartz and ferruginous matter are also present.
''Dolomite, medium-grained, breccioid, mosaic.''
(S34841). Dolomite of uniform grain-size, 0.5–1.0 mm. The grains are equidimensional and anhedral, no rhomboid outlines having been observed. Limonite is present in small quantity as granules and inter-granular films.
''Dolomite, medium-grained, mosaic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=276717 S34838]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121445 P552837] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121441 P552836] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102840 P527985] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102838 P527984] Thin section
M 2895 (p. 32) Dolomite. Quarry 150 yd E. of Sango Bay, Durness. 1" Sheet 114; 6" Sutherland 6 N.W. (Anal. W. Pollard in '''The Geological Structure of the North-West Highlands of Scotland','' 1907, ''Mem. Geol. Surv.,'' p. 637)
(S8129). Black and pale grey mottled, crystalline dolomite of medium grain ('Leopard Stone'); composed of interlocking grains of dolomite, 0.3 to 0.5 mm across, in which the only impurity is the dark dust, shown by Pollard to be carbon, which is uniformly present in the dark areas and patchily distributed in the grains of the grey areas.
''Dolomite, medium-grained, mosaic.''
=== Durness Limestone: Group IV (Sangomore) ===
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=276663 S8129]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122318 P553135] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122313 P553134] Mag: 40 Light: PPL
==== Sutherland ====
M 2921 (p. 32) Dolomitic limestone. Limestone Skerry, Baile na Cille (Balnakeil) Bay. 1" Sheet 114; 6" Sutherland 5 N.E. (Rough analysis by W. Pollard in ''The Geological Structure of the North-West Highlands of Scotland','' 1907, ''Mem. Geol. Surv.,'' p. 637, specimen No. M2921).
(S40167). Dark and pale grey, thin bedded limestone. Clean limestone, made of fine calcite dust and thin, small shells, forms irregular fragments and slivers in a darker argillaceous limestone containing few shells. Small dolomite rhombs, up to 0.05 mm across, are common and angular quartz chips, of similar size, are sparse ''in'' both varieties; small cubes of pyrite are scarce.
''Limestone, dolomitic, luteous, micrograined, fossiliferous,''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=276667 S8133]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122348 P553145] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122343 P553144] Mag: 40 Light: PPL
=== Durness Limestone: Group V (Balnakiel) Inverness (Skye) ===
SL 245 (p. 32) Altered limestone. Old marble quarry, 1½ miles N.W. of Broadford church and ¼ mile W. of the Sligachan road. 1" Sheet 71; 6" Inverness. (Skye) 40 S.E. (''Lst. Scot.,'' 1949, p. 120).
(S35345). A white, grey-mottled, altered limestone of aphanitic aspect. In thin section composed of interlocking grains of calcite, about 0.5 mm across, which enclose or interlock with aggregates of brucite. These aggregates are equidimensional and often show the sharp crystal edges of the mineral they pseudomorph (periclase). Forsterite is also present in small grains altered more or less to serpentine. Some grains of rutile and octahedra of periclase are present.
''Limestone with brucite, medium grained, granoblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=353396 S35345]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122013 P553026] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122015 P553027] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102428 P527859] Hand specimen
SL 248 (p. 33) Marble. Marble quarry 800 yd S.40°E. of Cill Chriosd (Kilchrist) church. 1" Sheet 71; 6" Inverness. (Skye) 46 S.E. (''Lst. Scot.,'' 1949, p. 121)
(S35348). A white translucent saccharoidal marble. Composed of interlocking grains of dolomite which are equidimensional but only rarely rhomboid and are usually about 0.5 mm across. There are a very few grains of forsterite, serpentinized along cracks.
''Dolomite, medium-grained, granoblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=353399 S35348]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122031 P553032] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122033 P553033] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102432 P527860] Hand specimen
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102472 P527870] Hand specimen
=== Durness Limestone: Group VI (Croisaphuill) Inverness. (Skye) ===
SL 246 (p. 33) Limestone. Torran, end of side road to Dun Beag. 1" Sheet 71; 6" Inverness. (Skye) 46 S.W. (''Lst. Scot.,'' 1949, p. 122).
(S35346). A banded grey and white limestone. Composed essentially of fine, often elongated grains of carbonate, 0.5–0-3 mm across, the grey band being finer-grained than the white. There is an accessory pro­portion of small equidimensional grains of forsterite. Crushed rock dissolved in 1:1 cold HCl gives a small residue showing also dolomite, diopside, tremolite and muscovite or talc aggregate.
''Limestone, medium-grained, grain-foliated, granoschistose.''
Limestone. Torran, end of side road to Dun Beag. Skye (Inverness). A banded grey and white limestone. Composed essentially of fine, often elongated grains of carbonate, 0.5 - 0.3 mm across, the grey band being finer-grained than the white. There is an accessory proportion of small equidimensional grains of forsterite. Crushed rock dissolved in 1: 1 cold HCl gives a small residue showing also dolomite, diopside, tremolite and muscovite or talc aggregate. Limestone, medium-grained, grain-foliated, granoschistose. SL0246. Britrocks S35346.
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=353397 S35346]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122017 P553028] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122022 P553029] Mag: 40 Light: XPL
SL 247 (p. 33) Limestone. Torran, Dun Beag. 1" Sheet 71; 6" Inverness. (Skye) 46 S.W. (''Lst. Scot.,'' 1949, p. 123.)
(S35347). A darkish grey limestone with saccharoidal texture, which shows bedding by alternation of paler and darker grey tints. Composed of a mosaic of grains of carbonate, 0.1–0.2 mm across, often elongated in the direction of bedding. Scattered among the carbonate are prismatic sections of a mineral almost wholly replaced by turbid calcite. In one place a relic of the original mineral suggests itself as tremolite.
''Limestone, medium-grained, grain-foliated.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=353398 S35347]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122025 P553030] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122027 P553031] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102452 P527865] Hand specimen
SL 249 (p. 33) Limestone. Roadside 550–650 yd S.W. of Cill Chriosd (Kilchrist) Church. 1" Sheet 71; 6" Inverness. (Skye) 46 S.E. (''Lst. Scot.,'' 1949, p. 121).
(S35349). A grey, fine-grained saccharoidal limestone. In thin section shows patchily varying grain, being mostly of grain-size 0.05–02 mm, but in places 0.01 mm or less and elsewhere of coarse grain up to 1.0 mm. Associated with the coarser carbonate are small areas of microcrystalline aggregate consisting of clear grains of carbonate and dark finely granular calcsilicates which include pyroxene and tremolite. Curved areas of coarser grain than the groundmass represent shell fragments.
''Limestone with calcsilicates, varigrained, zoophasmic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=353400 S35349]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122039 P553035] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122035 P553034] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84013 P531424] Thin section
=== Durness Limestone, unclassified ===
==== Sutherland ====
SL 271 (p. 33) Marble. Roadside 430 yd E.N.E. of Ledbeg. 1" Sheet 101; 6" Sutherland 82 S.W. (''Lst. Scot.,'' 1949, p. 191).
(S35796). A massive, structureless, compact, white marble, with faint yellow patternless markings. Composed of an aggregate of shapeless interlocking grains of calcite, 0.05–0.15 mm in size. These are generally traversed by very close set cleavage and twinning planes. In places the rock shows a mottling due to angularly patchy distribution of clear and turbid calcite. The clear patches are composed of the small grains and the turbid patches seem to be relics of large crystals in which almost submicroscopic striations (due to cleavage or twinning or both) have been produced. The striations are subparallel throughout the patch and are interrupted where new small grains with broader twin lamellae have crystallized. The orientation of the lamellae in such grains is diverse. In places narrow lines of shear are shown by granulation and parallel orientation of calcite grains and by a lining of thin serpentine flakes. Pseudomorphs of olivine in serpentine are sporadic in the rock as individual crystals or clusters. Phlogopite also is present in small flakes and aggregates, the calcite associated with which is coarser in grain than elsewhere in the rock. The rock is a marble triturated by stress.
''Limestone, serpentinous, varigrained, sheared.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=266766 S35796]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122125 P553064] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122128 P553065] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84045 P531432] Thin section
== Ordovician ==
=== Ayr ===
SL 152 (p. 33) Craighead (Stinchar) Limestone. Craighead Limeworks, 1 miles N.N.E. of Old Dailly and 3½ miles N.E. of Girvan. 1" Sheet 14; 6" Ayr. 50 S.W. (''Lst. Scot.,'' 1949, p. 61).
(S34654). Compact limestone, pale green mottled with white. Large algal growths, in finely granular clear calcite, are embedded in a turbid, very fine textured aggregate of calcite granules probably with clay admixture and in places cemented by ''Girvanella.'' In this base the main fossils are echinodermal and polyzoan fragments and a few thin-walled shells. The base has a patchy appearance suggesting the break-up of a clean limestone followed by packing of more muddy limestone round the fragments. A few tiny quartz grains are scattered in the turbid limestone. The rock is traversed by calcite-filled cracks.
''Limestone, luteous, pelitomorphic, algal, homoiolithic.''
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102832 P527981] Thin section
SL 153 (p. 34) Stinchar Limestone (lower, dark portion). Tormitchell Quarry, 3 miles N.N.E. of Pinmore railway station. 1" Sheet 8; 6" Ayr. 56 S.W. (''Lst. Scot.,'' 1949, p. 61).
(S34655). Dark grey compact limestone, composed of finely granular clear calcite mixed with turbid, possibly argillaceous, calcite aggregate of fine grain, through which black carbonaceous specks are scattered loosely. The larger constituents include fragments of shells, small entire shells, round bodies with granular calcite, aggregates of ''Girvanella'' and wisps of limonitic clay.
''Limestone, argillaceous, pelitomorphic to micrograined, zoichnic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=333125 S34655]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121411 P552826] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121414 P552827] Mag: 40 Light: XPL
SL 154 (p. 34) Stinchar Limestone (upper, grey portion). Locality as SL 153.
(S34656). Pale buff, or cream-coloured, compact limestone with semi-crystalline lustre. Composed of a matrix of clear calcite, of 0.05–0-3 mm grain, containing ooliths and numerous fairly well sorted calcareous pebbles, comprising subrounded fragments and knobby spheroids from 0.3–1.5 mm in size, perhaps of algal origin, subangular to rounded pieces of very fine-grained limestone containing ooliths and crinoid fragments but sometimes uniformly structureless, and rare crinoid ossicles. The rock is traversed by many thin calcite-filled cracks which show tensional rupture without lateral displacements. A few quartz grains are present in the matrix and in the semi-opaque limestone.
''Limestone, fine-grained, oolitic, pseudo-oolitic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=333126 S34656]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121418 P552828] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121420 P552829] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102834 P527982] Thin section
SL 266 (p. 34) Stinchar Limestone. Aldons Limeworks, 1½ miles S. of Pinmore station. 1" Sheet 7; 6" Ayr. 62 N.W. (''Lst. Scot.,'' 1949, p. 62).
(S35504). A dark grey compact limestone showing films of calcite coating irregular joints or fracture surfaces. Microscopically it is a calcilutite (calcite-mudstone) greatly recrystallized to clear granular cal­cite, 0.02–0.01 mm grain size. Numerous aggregations of algal tubes (''Girvanella'') are present and have in part resisted the recrystallization which has affected the matrix. Ostracods are common and parts of the rock are rich in crinoid columnals and shell fragments. A little quartz (about 3–5%) is present and pyrite in similar proportions occurs in small irregular grains and clots. In places clayey material is present in sufficient quantity to give the appearance of a calcite breccia with clay matrix. The rock contains fragments of pelitomorphic limestone and is veined and patched by coarsely crystallized calcite.
''Limestone, varigrained, zoichnic, clastizoic, homoiolithic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=331182 S35504]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122117 P553061] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122114 P553060] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84039 P531430] Thin section
SL 267 (p. 34) Stinchar Limestone. Kirkdominae Hill, Auchensoul Farm, 2 miles W. of Barr. 1" Sheet 8; 6" Ayr. 56 S.E. (''Lst. Scot.,'' 1949, p. 64).
(S35505). A fine-grained compact, dark grey limestone. Microscopi­cally the rock is a calcilutite (calcite-mudstone) recrystallized so far that the matrix is an admixture of turbid brown carbonate and clear fine-grained calcite, but without the destruction of the numerous fossil remains of ''Girvanella'' and ostracods. Scarce fragments of crinoid, polyzoan and shell, possibly brachiopod, are present. Pyrite is scattered in small grains and clots through the rock as an accessory constituent, and there are stylolitic wisps of limonitic clay.
''Limestone, argillaceous, pelitomorphic, microfossiliferous, zoichnic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=333191 S35505]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122121 P553062] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122124 P553063] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84042 P531431] Thin section
== Lower Old Red Sandstone ==
=== Angus ===
SL 27 (p. 34) Nodular cornstone. Old quarry 400 yd W.S.W. of Huntley Hill, 2½ miles N.E. of Brechin. 1" Sheet 57; 6" Angus 27 N.W.
(S34548). Dark grey-brown compact limestone composed of finely divided turbid calcite, recrystallized along dessication cracks to a coarser grain. Angular grains of quartz and subordinate plagioclase, felsite with microporphyritic quartz, chert and feldspathic siltstone are abundant and range from 1 mm downwards in length. Long slivers of muscovite, biotite, oxidized biotite and chlorite are present. Garnet and staurolite are scarce accessories.
''Limestone, arenaceous, micrograinsd, in part clotted.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=283942 S34548]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120985 P552684] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120982 P552683] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102760 P527949] Thin section
== Middle Old Red Sandstone ==
=== Caithness ===
SL 163 (p. 34) Flaggy limestone. Stream ½ mile E.S.E. of Halkirk station. 1" Sheet 116; 6" Caithness 17 N.E. ''Lst. Scot.,'' 1949, p. 83).
(S34850). Black limestone flag with thin lamination in shades of grey. In thin section alternating bands are seen to consist of: (1) coarser bands containing rhombs of dolomite up to 01 mm across, angular quartz grains, usually in subordinate proportion but sometimes abundant, plagioclase and scarce muscovite flakes, in a matrix of shapeless calcite obscured by disseminated bitumen or bituminous clay; (2) thin bands and lenticles of finely granular carbonate containing rhombs of dolomite, but little quartz or bituminous matter; (3) films of reddish-brown almost opaque bituminous clay. In places these films almost coalesce to form thin bands of gritty, calcareous bituminous shale.
''Limestone, dolomitic, luteous, bituminous, varigrained, laminar.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=292613 S34850]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121489 P552852] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121493 P552853] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102856 P527990] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102362 P527838] Hand specimen
SL 167 (p. 35) Limestone. Robbery Head, S. of Lybster. 1" Sheet 110; 6" Caithness 39 N.E. (''Lst. Scot.,'' 1949, p. 83).
(S34851). Dark fine-grained dolomitic limestone, thinly laminated in shades of grey. In thin section the rock has a micronodular appearance, smooth and corrugated lenticles of clear granular carbonate being swathed in a darker matrix lined with corrugated films of bituminous matter. The clear carbonate is predominantly dolomite with which some quartz is associated while the darker matrix consists of anhedral calcite, dolomite rhombs, bituminous clay and clastic quartz. The grain-size of dolomite and quartz may be 0 mm but is usually less. Small flakes of muscovite and biotite are present, mostly in the argillaceous laminae.
''Limestone, dolomitic, luteous, bituminous, varigrained, micronodular.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=291484 S34851]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121497 P552855] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102860 P527991] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102357 P527836] Hand specimen
SL 282 (p. 35) Limestone. Quarry, 1450 yd S. by W. of Achvarasdal, Reay. 1" Sheet 115; 6" Caithness 10 S.W.
(S35911). A pale buff compact limestone, composed essentially of rather turbid calcite in grains 0.01–0.15 mm across, with scattered larger grains. Angular quartz, up to 0.15 mm grain-size, white mica, in flakes generally 0.1 mm long, and potash-feldspar are abundantly distributed in the rock and are concentrated along thin laminae coloured dark by bituminous matter. In a concentration of minerals insoluble in cold dilute HCl, chlorite, hornblende and clay are found as accessory con­stituents, and it is seen that potash-feldspar has developed crystal faces during regrowth.
''Limestone, luteous, fine-grained, with sapropelitic laminae.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=273298 S35911]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122252 P553107] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122249 P553106] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84103 P531447] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84100 P531446] Thin section
== Upper Old Red Sandstone ==
=== Angus ===
SL 26 (p. 35) Gritty Limestone. Old quarry 200 yd W. 30° N. of Dubton station. 1" Sheet 57; 6" Angus 20 S.W.
(S34547). White pink-speckled saccharoidal gritty limestone composed of granular calcite, grain-size about 0.25 mm, and subordinate but abun­dant quartz and some potash-feldspar in angular to subangular grains of fairly uniform size (0.15–0.4 mm). There are a few pebbles of corn-stone and pebbly grains of strained quartz, fine sandstone or greywacke and felsite. Chlorite is accessory; tourmaline, anatase, zircon and apatite scarce.
''Limestone, arenaceous, medium-grained, subpoikilocrystallic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=283941 S34547]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120978 P552682] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120975 P552681] Mag: 40 Light: PPL
=== Ayr ===
SL 94 (p. 35) Cornstone. Craigdullyeart Limeworks, 3 miles E.N.E. of New Cumnock. 1" Sheet 15; 6" Ayr. 42 N.E. (''Lst. Scot.,'' 1949, p. 65).
(S34560). Dull cream-coloured rock which is much fractured. It is composed of a mixture of very fine-grained turbid carbonate and re­crystallized granular carbonate of grain-size varying from 0.03–0.3 mm. Rarely short tubules in the fine, turbid component suggest that it is partly algal in origin. In recrystallization clay material is concentrated sometimes round the periphery of relict pieces of fine-grained carbonate, sometimes interstitially between the recrystallized grains. Angular quartz and subordinate alkali-feldspar grains, up to 0.5 mm long, occur abundantly in patches; clay is present as impersistent irregular films; flakes of chlorite and grains of chert are accessory.
''Limestone, irregularly gritty and clayey, fine-grained, algal, clotted in part, breccioid.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=345973 S34560(a)]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121070 P552713] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121067 P552712] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102768 P527953] Thin section
SL 155 (p. 35) Cornstone. Lannielane Limeworks, 5 miles W.S.W. of Straiton; band in stream below the main worked limestone. 1" Sheet 14; 6" Ayr. 51 S.W. (''Lst. Scot.,'' 1949, p. 65).
(S34657). Dense whitish limestone with calcite veins and aggregations divided into indistinct nodules. In section it is seen to be a finely granular limestone of even grain averaging 0.03 mm. Veins and less well-defined insertions of coarsely crystalline clear calcite ramify through the fine-grained component. A few quartz and feldspar grains up to 0.2 mm in length are present among the fine calcite.
''Limestone, fine-grained, crook-veined, breccioid.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=348669 S34657]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121422 P552830] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121426 P552831] Mag: 40 Light: XPL
SL 156 (p. 35) Cornstone. Lannielane Limeworks; main worked band. 1" Sheet 14; 6" Ayr. 51 S.W. (''Lst. Scot.,'' 1949, p. 64).
(S34658). Dense, pale buff limestone containing impersistent veins or segregations of white calcite. Composed of very fine-grained granular carbonate (0.01 mm or less) which is patchily recrystallized, sometimes to a granular aggregate of 0.02–0.04 mm grain-size, sometimes to quite coarse segregations of clear calcite. Small rhombs of dolomite or ankerite occur sporadically in the fine calcite and also line a vein of coarse calcite. These are destroyed by a late infiltration of yellow chert, the latter replacing the dolomite with ejection of limonite. Grains of quartz, up to 0.5 mm, are scattered sparsely through the fine-grained limestone and are coated with and enclose granules of opaque matter, probably limonitic clay.
''Limestone, in part arenaceous, micrograined, clotted, breccioid.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=348670 S34658(a)]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121430 P552832] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121431 P552833] Mag: 40 : XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121436 P552834] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121438 P552835] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102836 P527983] Thin section
SL 170 (p. 36) Cornstone. Middlefield Quarry, 1½ miles N.W. of Muirkirk. 1" Sheet 23; 6" Ayr. 25 S.E. (''Lst. Scot.,'' 1949, p. 65).
(S34854). A brownish-grey limestone mottled in light and darker shades and of stony appearance. Composed of turbid fine-grained carbonate which is recrystallized along a diffuse network of channels to anhedral carbonate of grain-size 0.03–0.1 mm. This coarser clear carbonate (calcite) occupies extensive areas free from the turbid type. The latter contains numerous pellet structures which are sometimes uniformly almost opaque, sometimes composed of an opaque rind on a clear granular centre. Elsewhere the pellet structure is absent or forms only part of a more complex structural aggregate. Rarely irregular concentric structure suggests algal origin. It seems as if the carbonate had been originally deposited as a mud, in which perhaps worms worked faecal pellets, and that this had been brecciated and recrystallized. Streaks of opaque limonite are present.
''Limestone, fine to micrograined, clotted, micronodular.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=376444 S34854]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121508 P552858] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121511 P552859] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102868 P527993] Thin section
SL 257 (p. 36) Cornstone. Right bank of Poldownie Burn, 600 yd E.N.E. of Glenmuir-Shaw. 1" Sheet 15; 6" Ayr. 37 N.W. (''Lst. Scot.,'' 1949, p. 65).
(S35454). A pale purplish, compact limestone containing marly red spots and nests of white, more coarsely crystalline, calcite. The rock is composed of finely granular calcite of grain-size 0.02–0.05 mm. Short films of clay are present but scarce. The grain of the rock increases over small areas and coarse-grained calcite occurs along indefinite nodose channels. Quartz is sparsely distributed as single and composite grains.
''Limestone, subarenaceous, fine-grained, granular.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=345957 S35454]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122089 P553052] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122092 P553053] Mag: 40 Light: XPL
=== Fife ===
SL 104 (p. 36) Cornstone. Vane Quarries, Benarty Hill. 1" Sheet 40; 6" Fife 26 S.E.
(S34587). Banded greenish and grey limestone. The section appears to show a greenish band only and it is composed of subrounded quartz grains, with a low proportion of alkali-feldspar grains, cemented by calcite. Many quartz grains show regrowth rims which interlock with the calcite cement. Zircon and rutile are accessory. Alkali-feldspar includes microcline, albite and perthite.
''Calcareous, feldspathic, sandstone.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382406 S34587]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121233 P552767] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121230 P552766] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102283 P527817] Hand specimen
=== Kincardine ===
SL 24 (p. 36) Cornstone. Old limekiln at base of cliff, 400 yd N.N.E. of Seagreens, East Mathers. 1" Sheet 57; 6" Kincardine. 27 S.E. (''Lst. Scot.,'' 1949, p. 128).
(S34545). Purplish-grey, compact limestone with veins of clear calcite. Composed of granular calcite, the rock has the patchy distribution of fine, medium and coarse grains typical of cornstones, suggesting the original rock as of fine texture, 0.005 mm grain, with coarser material recrystallized or depositing in drying cracks. Relics of the original very fine semi-opaque carbonate-rock show pellet-structure and, rarely, a cellular structure which may indicate algal growths.
''Limestone, fine-grained, pelleted, micronodular, breccioid.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=283940 S34545]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120963 P552677] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120965 P552678] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102758 P527948] Thin section
=== Midlothian ===
SL 180 (p. 36) Cornstone. Quarry 400 yd W. by N. of Selms, 1¼ miles S. of East Calder. 1" Sheet 32; 6" Midlothian 5 S.E. (''Lst. Scot.,'' 1949, p. 141).
(S34901). A nodular rock composed of larger buff nodules which effervesce freely in cold dilute HCl and greenish non-effervescent nodules, in a fine breccia-like base containing much recrystallized or infiltrated calcite. The slide appears to include only the greenish nodules and these are composed of silty micaceous argillite or mudstone, marginally replaced by prisms of calcite growing in from the infilling calcite. The latter is composed of coarse grains which show growth zones and in places two periods of growth separated by a period of silica deposition. Some of the vein-like infillings contain also a central deposit of chalcedonic quartz.
''Mudstone, calcite-veined.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51454 S34901]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121612 P552893] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121609 P552892] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102896 P528000] Thin section
=== Moray ===
SL 105 (p. 36) Cornstone. Cothall Limestone Quarry, 2½ miles S.W. of Forres. 1" Sheet 84; 6" Moray (Elgin.) 10 S.E. (''Lst. Scot.,'' 1949, p. 148).
(S34584). Dull white and pale green limestone. Composed of finely granular calcite of patchily varying grain, recrystallized to coarser clear calcite along ill-defined channels. The granular calcite contains much brownish matter, possibly clayey, disseminated through it and locally sufficiently abundant to form a thin cement. Subangular quartz grains up to 0.5 mm across are scattered through the rock.
''Limestone, subarenaceous, fine-grained, granular.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=285090 S34584]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121215 P552761] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121213 P552760] Mag: 40 Light: PPL
== Upper Old Red Sandstone (near top) ==
=== Argyll ===
SL 283 (p. 37) Cornstone. 250 yd N. of Toward Taynuill. 1" Sheet 29; 6" Argyll. 194 S.E. (''Lst. Scot.,'' 1949, p. 39).
(S35912). A whitish compact dolomite, saccharoidal on fresh fracture, composed of equidimensional, sometimes rhomboidal, grains of dolomite, 0.05 to 0.4 mm, which is considerably turbidized by mineral dust. Calcite occurs locally in pockets of shapeless grains with undulose extinction, and yellowish aggregates of clay fill cavities up to 0.5 mm in length.
''Dolomite, calcareous, fine-grained, granular.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=378233 S35912]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122253 P553108] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122257 P553109] Mag: 40 Light: XPL
=== Bute ===
SL 228 (p. 37) Cornstone. Old Quarry 700 yd S.E. of Kilchattan pier. 1" Sheet 21; 6" Bute. 215 S.E. (''Lst. Scot.,'' 1949, p. 82).
(S35155). A cream-white rock with grey and green mottlings, composed of fragments of dolomite-mudstone of very fine grain, 0.002 mm, in a matrix of quartz grit cemented by abundant fine-grained dolomite. A few largish flakes of brown biotite, and some grains of microcline and crushed quartz are present. Thin veins of calcite cut the rock.
''Dolomite breccia, arenaceous, taxichnic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=375299 S35155]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121843 P552970] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121847 P552971] Mag: 40 Light: XPL
=== Stirling ===
SL 160 (p. 37) Cornstone. Gargunnock Burn, ¾ mile S. of Gargunnock. 1" Sheet 39; 6" Stirling. 16 N.E. (''Lst. Scot.,'' 1949, p. 39).
(S34860). A flaggy medium-grey compact dolomite, composed of turbid very finely granular dolomite, of grain-size about 0.005 mm, which is recrystallized irregularly along streaks and channels to clear dolomite of 0.03 mm grain-size. Obscure vermiform structure in the finer material suggests algal activity. Scarce secondary quartz is associated with good rhombs of dolomite in small lenticular spaces. Thin flakes of mica and angular grains of quartz are sparsely distributed and there are some relics of micro-fossils.
''Dolomite, luteous, pelitomorphic, microzoichnic, clotted, bedded.''
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121594 P552887] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121592 P552886] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102892 P527999] Thin section
== Carboniferous: Calciferous Sandstone Series ==
=== Cementstone Group (and probable equivalents) ===
==== Berwick ====
SL 207 (p. 37) Limestone. Shore cliff close to Bathing Pool, ¼ mile S. of Sharper Head, Berwick-on-Tweed. 1" (Scotland) Sheet 26, (England) Sheet 2; 6"
Berwick. 18 N.E., Northumberland N.S. 2 S.W.
(S35072). A brownish-cream, compact, fine-grained crinoidal limestone, composed of a turbid mass of granular calcite, 0.01 mm, and small calcar­eous organic debris through which are scattered foraminifera, larger shell fragments, ostracod valves, crinoidal fragments and scarcer polyzoan and algal fragments. There are numerous spines and ''Calcisphaera.'' The rock is traversed by occasional calcite-filled fractures. Microgranular pyrites, limonite and possibly bituminous matter impregnate some of the fossil fragments.
''Limestone, micrograined, microfossiliferous, clastizoic, stylolitic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=377548 S35072]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121784 P552950] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121786 P552951] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102940 P528011] Thin section
==== Dunbarton ====
SL 91 (p. 37) Cementstone in Ballagan Beds (bulk sample). Murroch Glen, ¼ mile E.N.E. of Murroch. 1" Sheet 30; 6" Dunbarton. N.S. 18 S.W. (''Lst. Scot.,'' 1949, p. 86).
(S34486). Earthy grey, compact rock composed of fine-grained dolomite of grain size less than 0.02 mm, through which are scattered elastic grains of quartz up to 0.1 mm across, accessory yellow biotite and interstitial isotropic clay.
''Dolomite, luteous, micrograined, uniform granular.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=394347 S34486]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120663 P552567] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120659 P552566] Mag: 40 Light: PPL
SL 148 (p. 37) Marl in Ballagan Beds. Murroch Glen, ¼ mile E.N.E. of Murroch. 1" Sheet 30; 6" Dunbarton. N.s. 18 S.W. (''Lst. Scot.,'' 1949, p. 86).
(S34650). Grey fissile calcareous shale. Angular grains of quartz (up to 0.5 mm across) are abundant and potash feldspar and flakes of muscovite subordinate in a brown extremely fine-grained matrix which shows some parallel orientation of fine micaceous constituents in an isotropic clay base. Carbonate is present as sporadic idiomorphic crystals in the clay and as thin laminae of minute grains and rhombs.
''Dolomitic gritty shale.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=394350 S34650]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121368 P552812] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121373 P552813] Mag: 40 Light: XPL
==== Dumfries ====
SL 206 (p. 38) Limestone. N. bank of Liddell Water, 1 mile E. of Harelaw Hole. 1" Sheet 11; Dumfries. 54 S.W. (''Lst. Scot.,'' 1949, p. 91).
(S35071). ' A grey compact crinoidal limestone. Composed of finely granular (0.05 mm) clear calcite, calcareous organic debris and some turbid, probably slightly argillaceous, fine calcitic interstitial matter. In this are set numerous foraminifera, fragments of shells, small crinoid columnals and some ostracods and spines. Brown carbonaceous matter impregnates a few obscure fossil remains.
''Limestone, fine-grained, microfossiliferous, clastizoic, granular.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=343387 S35071]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121778 P552948] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121780 P552949] Mag: 40 Light: XPL
==== Fife ====
SL 28 (p. 38) 'Kirkby's IIIa Limestone'. Shore at Randerston. 1" Sheet 41; 6" Fife 16 N.W. (''Lst. Scot.,'' 1949, p. 108).
(S34450). Banded grey and buff close-grained dolomite with flinty fracture. Composed of finely granular dolomite 0.02–0.03 mm grain, the refractive index of which, ɷ = 1.697 or slightly greater, indicates a content of about 20 per cent (CaFe)CO3. The rock contains numerous thin tests of ostracods many of which are preserved in black material probably pyrite. Granules and tiny cubes of oxidized pyrite are scattered through the rock. Yellow phosphatic fossil fragments are very scarce.
''Ferriferous dolomite, micrograined, microfossiliferous, taxichnic, bedded.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=384292 S34450(a)]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120443 P552494] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120440 P552493] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120438 P552492] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120445 P552495] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102709 P527930] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102162 P527786] Hand specimen
SL 29 (p. 38) 'Kirkby's III Limestone'. Shore at Randerston. 1" Sheet 41; 6" Fife 16 N.W. (''Lst. Scot.,'' 1949, p. 108).
(S34451). A rudely platy, irony, shelly rock of lumachelle type. The shells are replaced by turbid coarsely granular ferriferous dolomite, and are embedded in a matrix of carbonate stained and cemented by limonite. This carbonate is in part very finely granular, in part recrystallized to a mosaic of irregular grain up to 0.1 mm across. Its ordinary refractive index mostly is 1.700 but varies upward, the highest value observed being 1.715, indicating a content of fully 20 per cent of ferrodolomite. Numerous fragments of small shells and scarce quartz and mica are scattered through the fine-grained matrix.
''Ferriferous dolomite. limonitic, micrograined, zoichnic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=383674 S34451]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120448 P552496] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120456 P552498] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120459 P552499] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120451 P552497] Mag: 40 Light: XPL
SL 30 (p. 38) 'Kirkby's V Limestone'. Shore at Randerston. 1" Sheet 41; 6" Fife 16 N.W. (''Lst. Scot.,'' 1949, p. 108).
(S34452). Brownish-buff massive rock which in some bands is almost wholly composed of shells. In thin section the shells are seen to be cemented by a matrix of fine granular clear carbonate in which are set numerous granules of oxidized siderite (0.01–0.02 mm), angular quartz grains (0.1–0.5 mm) and a few yellow phosphatic fossil fragments. A few small cavities are filled with kaolin. The carbonate replacing the shells is an ankerite the refractive index of which is variable being generally between 1.690 and 1.700 but as high as 1.705, and the fine-grained carbonate of the matrix is similar.
''Ferriferous dolomite, arenaceous, sideritic, micrograined, zoichnic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=384293 S34452]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120462 P552500] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120463 P552501] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120467 P552502] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120471 P552503] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102719 P527932] Thin section
SL 31 (p. 38) 'Kirkby's VII Limestone'. Shore at Randerston. 1" Sheet 41; 6" Fife 16 N.W. (''Lst. Scot.,'' 1949, p. 108).
(S34453). Buff-grey, finely saccharoidal dolomite with cavities con­taining tiny crystals of ankerite, refractive index ɷ = 1.715. In thin section the rock is seen to be completely recrystallized to a mosaic of irregular grains of carbonate, 01–0.2 mm across, which are partly turbid, partly clear. Ghosts of shells and of finely granular matrix are outlined and depicted by dust patterns and variations in grain persisting through the recrystallized carbonate, which is a ferriferous dolomite with refractive index varying slightly about 1.690. Perfect rhombs of carbonate in the fine-grained dolomite are probably ankerite similar to the crystals of the cavities.
''Ferriferous dolomite, fine-grained, zoophasmic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=384294 S34453]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120474 P552504] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120476 P552505] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120478 P552506] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120481 P552507] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102724 P527933] Thin section
SL 32 (p. 38) Dolomitic limestone. Muiredge, 2 miles N. of Anstruther. 1" Sheet 41; 6" Fife 22 N.B.
(S34454). Flaggy earthy brown dolomite with streaks of calcite. Com­posed of a great number of small shells, preserved in turbid ferriferous dolomite, all lying parallel to the bedding and cemented by irregularly oil-stained fine-grained carbonate which is largely a ferriferous dolomite, with varying content of ferrodolomite but never pure dolomite. Scarce granules of sideritic carbonate of high refractive index are distributed through the fine-grained carbonate; finely divided clay material occurs in shell casts, and some phosphatic fragments and grains of pyrite are present. Heavy yellow oil is evolved from the powdered rock on heating in a closed tube.
''Ferriferous dolomite, bituminous, micrograined, microzoichnic, bedded.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=384295 S34454]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120485 P552508] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120487 P552509] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120491 P552510] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120495 P552511] Mag: 40 Light: XPL
SL 33 (p. 39) Dolomite. Carnbee Dean, 2½ miles N.N.W. of Pittenweem. 1" Sheet 41; 6" Fife 22 N.E. (''Lst. Scot.,'' 1949, p. 108).
(S34455). Dark grey dolomitized encrinital limestone. Composed of a mass of fragments of crinoid, some shells and scarce foraminifera replaced by granular dolomite in a base of finely granular dolomite and clay among which deeply yellow stained grains of sideritic carbonate are distributed. The dolomite replacing the fossil fragments is ferriferous with a variable content of ferrodolomite of about 20 per cent estimated from the refractive index, 1.700 and slightly less. Quartz in small angular grains, 0.05 mm, and pyrite in clusters of granules are common throughout the fine-grained matrix.
''Ferriferous dolomite, luteous, micrograined, zoichnic.''
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102732 P527935] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102208 P527798] Hand specimen
SL 40 (p. 39) Dolomite. Cameron Burn, near Lathockar. 1" Sheet 41; 6" Fife 15 N.W. (''Lst. Scot.,'' 1949, p. 108).
(S34461). Ochre-weathering, uniformly fine-grained saccharoidal dolo­mite. Composed of equigranular dolomite of grain 0.1–0.2 mm among which are sparsely scattered grains of quartz of similar size, small nests of kaolin, and granules of oxidized pyrite.
''Dolomite, fine-grained, mosaic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=384301 S34461]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120532 P552524] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120536 P552525] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120539 P552526] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120543 P552527] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102212 P527799] Hand specimen
==== Kinross ====
SL 157 (p. 39) Cementstone: 'Upper Cement Bed'. Devonshaw Old Quarry, 2½ miles E. of Dollar. 1" Sheet 39; 6" Kinross. 25 S.W.
(S40620). Dull greyish-white, compact dolomite banded with less fine-grained, gritty cream-coloured calcareous dolomite. In thin section the compact dolomite is composed of a close aggregate of rhomboid granules, about 0.005 mm across, of dolomite among which calcite is abundant, and through which angular grains of quartz, up to 0.2 mm in size, shreds of colourless mica and fragments of pelitomorphic dolo­mite are irregularly distributed. The gritty portion is composed of angular grains of quartz, up to 0.5 mm, and numerous pseudo-ooliths of pelitomorphic dolomite which with subordinate microcline and fine-grained silica-rock are cemented by rhomboid dolomite of varying grain and by shapeless calcite.
''Dolomite, arenaceous and dolomitic sandstone, interbanded, taxichnic.''
SL 158 (p. 39) Cementstone. 'Lower Sandy Bed'. Devonshaw Old Quarry, as preceding.
(S34858). Compact, mottled grey-brown and cream dolomite. Com­posed of a base of dolomite in grains and rhombs of 0.02 to 0.1 mm size in which relic patches of very fine-grained pelleted carbonate rock are preserved. In this base irregular patches and single rhombs of coarsely crystallized dolomite about 1 mm across are numerous. Subangular grains of quartz are sporadically abundant in both the coarse and fine dolomite. Ferruginous clay films are common locally and their material has been pressed aside by the large dolomite crystals during their growth. ''Dolomite, calcareous, arenaceous, fine-grained, porphyrocrystallic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=380726 S34857]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121567 P552878] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121571 P552879] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121572 P552880] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121577 P552881] Mag: 40 Light: XPL
==== Midlothian ====
SL 181 (p. 39) Cementstone. Linhouse Water, 120 yd N.W. of the upper (south) railway viaduct, 2 miles S. of Mid Calder. 1" Sheet 32; 6" Midlothian 5 S.E. (''Lst. Scot.,'' 1949, p. 141).
(S34902). A dull compact grey rock, composed mainly of grains of carbonate, 0.005–0-01 mm across, which by refractive index tests is shown to be ferriferous dolomite. Slightly larger grains up to 0.02 mm much altered to limonite probably represent siderite. In thin seams rich in quartz and muscovite the carbonates are less finely grained and oxidized siderite up to 0.05 mm can be distinguished among clear finely granular carbonate. Fresh biotite is present but scarce in these seams and alkali-feldspar, muscovite and chlorite also are present. Contem­poraneous brecciation of the fine-grained dolomite into the arenaceous seams suggest that the dolomite is an original precipitation or a lime-mud contemporaneously dolomitized.
''Ferriferous dolomite, micrograined, with arenaceous laminae, taxichnic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51455 S34902]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121615 P552894] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121618 P552895] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102900 P528001] Thin section
==== Roxburgh ====
SL 200 (p. 39) Limestone. Thorlieshope Limeworks, 400 yd S. of Hob Knowe, 4 miles E. of Riccarton Junction. 1" Sheet 17; 6" Roxburgh. N.S. 36 S.W. (''Lst. Scot.,'' 1949, p. 169).
(S35065). A grey cavernous limestone of fine grain, the cavities in some cases represent shells dissolved away; small black pellets are numerous in patches. Composed of a large number of large fairly thin-walled shells, which enclose turbid calcite-mudst6ne in various stages of re-crystallization, in a partially recrystallized and dolomitized matrix. The less recrystallized portions show a clotted structure, contain frag­ments of thin shells and in places contain rolled or angular fragments of shelly calcite-mudstone, shell fragments coated with precipitated calcite and, more rarely, ooliths, together with fragments of hollow structures, perhaps spines. Refractive index tests show that both dolo­mite and ankerite are present.
''Limestone, dolomitic, pelitomorphic, fossiliferous, clotted, pseudo-oolitic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=346995 S35065]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121750 P552939] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121747 P552938] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102932 P528009] Thin section
SL 201 (p. 40) Limestone. Larriston Limeworks, Larriston Tower, 6 miles N.E. of Newcastleton. 1" Sheet 11; 6" Roxburgh. N.S. 38 N.E. (''Lst. Scot.,'' 1949, p. 169).
(S35066). Dark grey, compact fine-grained limestone; small round bodies are seen in places. The rock shows in thin section a very fine-grained brownish calcilutite containing fragments of thick and thin shells, ooliths, shell fragments coated with oolitic calcite, tiny grains of quartz, and pebbles of calcilutite similar to the matrix with and without shells and ooliths. In part of the slide the matrix is almost completely recrystallized to clear calcite.
''Limestone, luteous, pelitomorphic, fossiliferous, clastizoic, oolitic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=343382 S35066]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121754 P552940] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121756 P552941] Mag: 40 Light: XPL
SL 202 L(p. 40) imestone. Junction of Tweeden Burn and Liddel Water, 1 mile S. of Newcastleton. 1" Sheet 11; 6" Roxburgh. N.S. 40 S.E. (''Lst. Scot.,'' 1949, p. 168).
(S35067). A dark, brownish-grey, nodular limestone. The thin section shows a mass of algal limestone in which radiating and bifurcating canals of clear fine-grained calcite penetrate a base of semi-opaque, extremely
fine-grained calcite. Recrystallization has affected the rock in patches so that the organic structure is in places destroyed. The algal mass is coated and infilled by fine-grained shell limestone containing quartz grit and muscovite flakes.
''Limestone, micrograined to pelitomorphic, algal.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=343383 S35067]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121763 P552943] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121760 P552942] Mag: 40 Light: PPL
SL 203 (p. 40) Limestone. Muir Burn, 660 yd N.W. of Liddelbank House. 1" Sheet 11; 6" Roxburgh. N.S. 42. (''Lst. Scot.,'' 1949, p. 168).
(S35068). A granular dark brownish-grey limestone, showing small crinoid columnals. Composed of the debris of crinoid columnals, shells, ostracods, foraminifera, polyzoa and spines, the fine material being recrystallized to clear fine-grained calcite in which the polyzoan and foraminiferal fragments are prominently picked out by opaque bitu­minous impregnations in the cell walls. Angular grains of quartz up to 0.5 mm long, are abundant.
''Limestone, arenaceous, fine-grained, clastizoic, microfossiliferous.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51615 S35063]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121740 P552935] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121737 P552934] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102936 P528010] Thin section
SL 208 (p. 40) Limestone. Old quarry, 100 yd N. of Stobs Quarry, Limekilnedge, 9 miles S. of Hawick. 1" Sheet 17; 6" Roxburgh. N.S. 35 N.W. (''Lst. Scot.,'' 1949, p. 170).
(S35073). A whitish, nodular, argillaceous limestone. Composed of a mass of granular carbonate of which the grain-size is occasionally 0.03 mm but usually 0.01 mm and often less. This has a turbid appearance and there may be films of clay on the grains, but the apparent turbidity may be caused only by the small grain-size. Through this mass small angular quartz chips (0.2 mm down) are sporadically scattered. Re-crystallization to clear granular calcite (0.1 mm grain) has taken place along impersistent sinuous or irregular channels.
''Limestone, luteous, micrograined, uniform granular, crook-veined.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=346994 S35073]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121791 P552952] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121794 P552953] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102944 P528012] Thin section
SL 220 (p. 40) Dolomite. Quarry on Nottylees Farm, 600 yd S.E. of Carham station. 1" Sheet 26; 6" Roxburgh. N.S. 7 S.W. (''Lst. Scot.,'' 1949, p. 170).
(S35074). A brownish-cream, fine-grained, compact, structureless dolomite. Composed of granular, occasionally rhomboid dolomite, grain-size 0.03 mm. There is a considerable quantity of opaque white material which usually occurs as clusters averaging 0.01 mm across, embedded centrally in the dolomite grains. As this structure seems unlikely to be original, it suggests that the dolomite, in spite of its small grain, is recrystallized. Argillaceous matter may be present as coatings on the dolomite grains. In places stylolitic films separate the rock into small irregular nodules.
''Dolomite, micrograined, uniform granular, taxichnic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=377213 S35074]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121795 P552954] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121799 P552955] Mag: 40 Light: XPL
SL 221 (p. 40) Dolomite. S. side of railway, 400 yd W. of Carham station. 1" Sheet 26; 6" Roxburgh. N.S. 7 S.W. (''Lst. Scot.,'' 1941, p. 170).
(S35075). Pale cream, compact, very fine-grained dolomite with small-scale nodular structure. Composed of small, occasionally rhomboid grains (0.02 0.04 mm grain-size) of dolomite, probably coated with some argillaceous matter. The nodular structure is not seen in thin section but there is a weak banding of clearer and more turbid dolomite. The rock is cut by calcite-filled fractures which are faulted by narrow fractures also calcite-filled. Quartz grains, up to 0.5 mm long, are sparsely scattered through the rock.
''Dolomite, micrograined, uniform granular.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=377214 S35075]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121805 P552957] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121802 P552956] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102948 P528013] Thin section
==== Stirling ====
SL 192 (p. 41) Cementstones, Ballagan Beds (bulk sample of 8 bands). Ballagan Burn, 530 yd N. of Ballagan House. 1" Sheet 30; 6" Stirling. 27 N.W. (''Lst. Scot.,'' 1949, pp. 177–8).
(S34968). Compact grey rock, composed of a mass of rhomboid dolo­mite crystals, 0.005–0.02 mm across, with very little turbid matter of any kind, argillaceous or calcareous. Angular grains of quartz, 0.1–0-5 mm across, are abundantly scattered through the rock along with scarce alkali-feldspar, secondary quartz-rock, chlorite and thin prisms of a mineral, occurring in cracks and in association with quartz, which is probably baryte. The presence of small prisms of gypsum was sus­pected, but not proved.
''Dolomite, luteous, micrograined, uniform granular.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=400804 S34968]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121703 P552923] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121699 P552922] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102928 P528008] Thin section
SL 193 (p. 41) Cementstone, Ballagan Beds. Locality and references as for SL 192.
(S34969). A grey compact rock composed of granular and rhomboid carbonate, of average grain-size 0.005 mm, among which there are tiny patches of brownish argillaceous matter. Angular grains of quartz and flakes of muscovite are sparsely scattered through the rock.
''Dolomite, luteous, pelitomorphic, clotted, taxichnic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=400805 S34969]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121709 P552925] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121706 P552924] Mag: 40 Light: PPL
SL 194 (p. 41) Marly shale, Ballagan Beds. Locality and references as for SL 192.
(S34970). Darkish grey very fine-grained rock, rough to the touch. Composed of grains and rhombs of dolomite, of average grain-size 0.005 mm, with some interstitial faintly brown isotropic material of refractive index close to that of canada balsam, possibly halloysite. Abundant angular grains of quartz, grain-size 0.1–0.01 mm and sparse muscovite are scattered through the rock.
''Dolomitic siltstone.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=400806 S34970]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121711 P552926] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121714 P552927] Mag: 40 Light: XPL
SL 195 (p. 41) Hard manly bed, Ballagan Beds. Locality and references as for SL 192.
(S34972). Dull grey compact rock, composed of granular and rhomboid carbonate, 0.005–0.02 mm grain-size, and accessory angular quartz and muscovite flakes. There is a small amount of interstitial isotropic material.
''Dolomite, luteous, micrograined, uniform granular.''
Note on specimens (S34968), (S34969), (S34970), (S34972): Refractive index tests on powdered rock always show dolomite as the carbonate. No index for calcite was obtained in any of the rocks, the only variation being slightly on the ankerite side in some grains of (S34972). Since all these rocks effervesce slightly in cold dilute HCl some calcite must be present as a fine dis­semination. In powders immersed in oil a thin skin of apparently isotropic material of much lower refractive index is discernible on the dolomite rhombs when these are orientated so that their index is equal to that of the oil. This is the clay cementing material and is only rarely discernible in thin section (S34970). When the powdered rock is treated with hot HCl a considerable clay residue is obtained. This does not lend itself to microscopical examination, the only identifiable minerals being quartz chips, and sericite fibres, the main constituent being an aggregate of minute granules in a feebly polarizing base of average refractive index 1.60–1.61.
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=400808 S34972]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121717 P552928] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121722 P552929] Mag: 40 Light: XPL
GS10 Cementstone. Campsie Glen, at the waterfall, just below the junction of (p. 41) Cementstones with the Campsie Volcanic Group; 580 yd N. of Ballencleroch House. 1" Sheet 30; 6" Stirling. 27 N.E. (Anal. C. O. Harvey)
(S33200). Dull grey rock composed of clear, granular and rhomboid carbonate, of grain 0.01–0.02 mm with irregular relics of turbid car­bonate of still finer grain. Scattered grains of quartz, occasional yellowish micaceous material, alkali-feldspar and tiny films of white mica are also present.
''Dolomite, luteous, micrograined, with pelitomorphic lattice.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=393450 S33200]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120202 P552414] Mag: " Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120200 P552413] Mag: 16mm Light: PPL
=== Oil Shale Group (and probable equivalents) ===
==== Burdiehouse Limestone ====
===== Fife =====
SL 171 (p. 41) Burdiehouse (Grange) Limestone. Newbigging Mine, 1 mile W. of Burntisland. 1" Sheet 40; 6" Fife 40 N.W.
(S34855). Dull cream-grey, compact limestone showing numerous ostracods. Composed of a matrix of finely divided carbonate, 0.001–­0.005 mm grain-size in which are set numerous ostracod shells and some fragments of thicker molluscan shells. The ostracod bivalves when complete are filled with more coarsely granular carbonate up to 0.2 mm. grain.
''Limestone, pelitomorphic, microfossiliferous: microcoquinoid.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382448 S34855]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121516 P552861] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121514 P552860] Mag: 40 Light: PPL
SL 172 (p. 42) Dolomite vein in Burdiehouse or Grange Limestone. Newbigging Mine. 1" Sheet 40; 6" Fife 40 N.W. (''Lst. Scot.,'' 1949, p. 100).
(S34856). Brown dolomite with lustrous crystalline surfaces, composed of an aggregate of anhedral ankerite of uniform grain 0.1–0.2 mm size, and of a uniform pale brown tint. Sporadic, small oval areas of clear carbonate including calcite represent ostracods. The ankerite in the section and in powder appears to be homogeneous, ɷ = 1.707 corres­ponding to about 12 per cent FeO. These figures agree well with the chemical analysis considering that free calcite is present. The rock has a small proportion of empty pore spaces. Small aggregates of pyrite granules are present.
''Ferriferous dolomite, fine-grained, uneven mosaic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382449 S34856(b)]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121519 P552862] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121521 P552863] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121526 P552864] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121528 P552865] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121532 P552866] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121534 P552867] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121538 P552868] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121541 P552869] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121542 P552870] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121547 P552871] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121550 P552872] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121552 P552873] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121555 P552874] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121558 P552875] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121562 P552876] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121565 P552877] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102360 P527837] Hand specimen
SL 216 (p. 42) Burdiehouse Limestone, 'Flooring'. Newbigging Mine. 1" Sheet 40; 6" Fife 40 N.W. (''Lst. Scot.,'' 1949, p. 99).
(S35896). A dull fawn-grey limestone, composed of very finely granular calcite recrystallized to grains reaching 0.06 mm across. In this matrix are scattered fragments of shells, mainly ostracod, and of cellular or­ganisms and some quartz grains of 0.2 mm grain-size. Granules of pyrite are scarce, being occasionally concentrated in a shell fragment, and limonitic clay is thinly spread through some portions of the rock. The limestone is traversed by narrow and irregular cracks which are sealed by calcite.
''Limestone, micrograined to pelitomorphic, microfossiliferous, clotted.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382417 S35896]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122191 P553086] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122194 P553087] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102392 P527850] Hand specimen
SL 217 (p. 42) Burdiehouse Limestone, 'Bottom Bed'. SL 216.
(S35897). A dull fawn-grey limestone, containing scattered smooth-surfaced black bodies which include limestone. The rock is composed of very finely divided calcite, locally slightly and irregularly recrystallized, with sparse, small rhombs of dolomite reaching 0.2 mm size. Scattered through the rock are fairly numerous thin shells and shell fragments densely permeated by pyrite: many are of ostracods, either whole or broken and collapsed, and often filled with clear coarsely granular calcite. Quartz grains are small and few. Irregular, short veins of limonitic matter and cracks sealed by calcite are common.
''Limestone, dolomitic, pelitomorphic, microfossiliferous, microclastizoic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382418 S35897]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122196 P553088] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122199 P553089] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84065 P531437] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84069 P531438] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102400 P527852] Hand specimen
SL 218 (p. 42) Burdiehouse Limestone, 'Middle Bed'. Locality and references as for SL 216.
(S35898). Dull fawn-grey limestone containing a few black bodies and laminated locally by indefinite dark brown laminae. The section shows extremely finely divided calcite, slightly and irregularly recrystallized, forming the matrix, and containing many small fragments of thin shells, some of which are impregnated with pyrites, and many tiny crystals and radiating grains of clear carbonate. Granules of partly oxidized pyrite and hydrocarbon streaks are present. Narrow anastomosing fractures filled with calcite are numerous.
''Limestone, pelitomorphic, microclastizoic, fracture-veined.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382419 S35898]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122206 P553091] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122202 P553090] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102404 P527853] Hand specimen
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102488 P527874] Hand specimen
SL 219 (p. 42) Burdiehouse Limestone, 'Top Bed'. Locality and references as for SL 216.
(S35899). Dull pale cream-coloured limestone, containing in many places clear quartz grains, black bodies and scattered carbonaceous fragments. The rock is composed of very finely divided calcite slightly recrystallized. Ostracod valves are numerous, and when entire contain coarse-grained clear calcite. Pyrites impregnation is scarce and not intense. Quartz grains occur sporadically in the shelly pockets. Rhombs of pale brown dolomite or ankerite, about 0.05 mm across, are seen in parts of the thin section. Shreds of black, carbonaceous matter are present.
''Limestone, dolomitic, pelitomorphic, microfossiliferous, fracture-veined.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382420 S35899]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122208 P553092] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122212 P553093] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102390 P527849] Hand specimen
===== Midlothian =====
SL 16 (p. 42) Burdiehouse Limestone (top). Clippens Limeworks, near Straiton. 1" Sheet 32; 6" Midlothian 7 S.E. (''Lst. Scot.,'' 1949, p. 143).
(S34524). Fine-grained buff limestone with dark brown laminae. Com­posed of finely divided turbid calcite, irregularly recrystallized to clear calcite of grain 0.01–0.05 mm, in which crushed ostracod shells and fragments are set. Many shells are partly or wholly replaced by pyrite. ''Limestone, micrograined to pelitomorphic, microfossiliferous, micronodular.''
SL 17 (p. 43) Burdiehouse Limestone (middle). Locality and references as for SL 16
(S34525). Compact buff limestone with widely separated dark brown laminae. Composed of a brown oil-stained matrix of calcite of fine
Locality and references as for grain in which are set numerous irregular patches or fragments of clear, granular calcite together with crushed ostracod shells, occasional small shapeless clots of collophane, small scattered aggregates of pyrite granules and small fragments of carbonaceous matter.
''Limestone, bituminous, pelitomorphic, microfossiliferous, bedded, homoiolithic microbreccia.''
SL 18 (p. 43) Burdiehouse Limestone (base). Locality and references as for SL 16.
(S34526). Compact limestone banded in darker and less dark brown shades. Composed of almost structureless finely granular yellow-stained calcite interbanded with layers to which the irregular mingling of clear and yellow stained rock gives a fragmental appearance as in
(S34525). Ostracod shells are abundant in the coarser seams and collo-phane clots are present. Wisps of bitumen and carbonaceous fragments occur sparsely throughout the rock.
''Limestone, bituminous, pelitomorphic, microfossiliferous, bedded, homoiolithic microbreccia.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51096 S34526]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120841 P552636] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120837 P552635] Mag: 40 Light: PPL
SL 54 (p. 43) Burdiehouse Limestone. Harburn Limestone Mine, 1 mile S. of Harburnhead. 1" Sheet 32; 6" Midlothian 11 S.E.
(S34449). Compact earthy-brown, fine-grained limestone. Composed of minutely granular calcite, grain in general less than 0.002 mm, per­meated by films of yellow bituminous matter. Complete and fragmen­tary ostracod shells, enclosing clear coarsely granular calcite are numerous. Grains of pyrite granules, occasional streaks of bitumen and traces of fossil phosphate are present. Some fine quartz grit occurs in certain laminae along with small aggregates of a radiating mineral which, in view of the chemical analysis, may be celestite. The rock powder on heating in the closed tube emits a little oily vapour.
''Limestone, bituminous, pelitomorphic, microfossiliferous, bedded, homoiolithic.''
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120431 P552490] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120433 P552491] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102704 P527929] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102240 P527806] Hand specimen
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102204 P527797] Hand specimen
SL 198 (p. 43) Burdiehouse Limestone. Harburn Limestone Mine, ⅔ mile S. of Harburnhead and 2½ miles S.E. of West Calder. 1" Sheet 32; 6" Midlothian 11 S.E. (''Lst. Scot.,'' 1949, p. 143).
(S35063). A dark buff, fine-grained limestone containing numerous small dark grains, visible by hand lens. Composed of extremely finely divided turbid calcite containing a multitude of yellowish carbonate grains of all shapes up to about 1 mm across, and numerous fossil frag­ments. The latter include many thin shell fragments and scarce com­plete small ostracods. There are also some large, irregular-shaped pellets (up to 1 mm across) within which the carbonate occurs as grit in a turbid matrix; these are perhaps faecal pellets. Traces of quartz grit are present.
''Limestone, pelitomorphic, microfossiliferous, microclastizoic.''
===== West Lothian =====
SL 173 (p. 43) Burdiehouse Limestone. Hopetoun Wood Quarry, Abercorn. 1" Sheet 32; 6" West Lothian 4 N.E. (''Lst. Scot.,'' 1949, p. 196).
(S35986). Almost black aphanitic rock, resembling bituminous mud-stone. Composed of a very fine calcite aggregate coloured brownish and yellowish by finely disseminated bituminous matter. In the larger pieces and long streaks the latter is mainly a homogeneous yellow isotropic material but is sometimes orange and almost opaque. Opaque material includes carbonaceous matter and pyrite. These constituents produce a parallel banding in the rock. There are occasional calcareous frag­ments of shells, and only a very few grains of quartz are recognizable. The rock powder, heated in a closed tube, evolves a heavy yellow oil and a more volatile colourless fraction.
''Limestone, bituminous, luteous, pelitomorphic, subclastizoic, bedded.''
==== Other limestones ====
===== Ayr =====
SL 108 (p. 43) Broadstone Limestone. Disused quarry at Langside Farm. 1" Sheet 22; 6" Ayr. 8 N.E. (''Lst. Scot.,'' 1949, p. 74).
(S34563). Grey limestone with brachiopod shells. Composed of the debris, largely unworn, of large and small shells, polyzoan fragments, small crinoid ossicles, spines, ostracods, algal growths and foraminifera. The foraminifera, some shells and polyzoan cells have impregnations of blackish material, possibly bituminous. All these larger constituents are embedded in an extremely fine-grained base of semi-opaque calcite granules, which is recrystallized to clear calcite of small grain in an irregular manner. Irregularly shaped small pockets of kaolinite are present and are visible as white specks in the hand-specimen.
''Limestone, pelitomorphic to fine-grained, clastizoic, in part zoophasmic.''
SL 122 (p. 44) Broadstone Limestone. Nettlehirst Quarry, 2¼ miles S.S.E. of Beith. 1" Sheet 22; 6" Ayr. 8 S.W. (''Lst. Scot.,'' 1949, p. 74).
(S34570). Grey limestone with microfossils and many crinoid plates. Large and small shell fragments, productid spines, polyzoan fragments, crinoid columnals and foraminifera are abundant in a turbid base of calcite granules 0.01 mm and less across. This base contains many pieces of calcite recognizable as chips of shell and the whole is derived from a shell mud. The canalicules of brachiopod shells and the chambers of foraminifera are sometimes filled with pyrites.
''Limestone, pelitomorphic, fossiliferous, clastizoic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51139 S34570]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121136 P552735] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121133 P552734] Mag: 40 Light: PPL
SL 135 (p. 44) Wee Post Limestone. Auchenmade Quarry, 600 yd W. of Auchenmade station and 3 miles E. by S. of Dalry. 1" Sheet 22; 6" Ayr. 12 N.W. (''Lst. Scot.,'' 1949, p. 75).
(S34621). Pale buff-grey limestone with many crinoid plates. Composed of crinoid columnals and ossicles, spines, large shell fragments, small shells, polyzoan skeletons with cells filled with dark carbonaceous dust, and occasional foraminifera. All these are set in a matrix of recrystallized granular carbonate containing many small fragments of shells and polyzoa, and scattered grains of pyrite.
''Limestone, micrograined, clastizoic, in part zoophasmic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51190 S34621]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121279 P552782] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121283 P552783] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121285 P552784] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121289 P552785] Mag: 40 Light: XPL
SL 136 (p. 44) Broadstone Limestone. Auchenmade Quarry, as above. 1" Sheet 22; 6" Ayr. 12 N.W. (''Lst. Scot.,'' 1949, p. 75).
(S34622). Grey argillaceous limestone with ''Lithostrotion.'' Composed of large and small fragments of crinoids and of shells, spines, large and small foraminifera, ''Calcisphaera,'' and occasional coral and polyzoan pieces in a bedded matrix of finely granular calcite mixed with small fossil relics, limonite shreds and opaque carbonaceous fragments and pyrite grains. Orange and opaque bituminous material forms undulating films and streaks along the bedding. The larger organic fragments are mostly arranged with their long axes parallel to the bedding.
''Limestone, micrograined, clastizoic, bedded.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51191 S34622]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121295 P552787] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121290 P552786] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102814 P527973] Thin section
===== Dumfries =====
SL 142 (p. 44) Dolomite. Barjarg Quarry, 440 yd N.E. of Barjarg Tower, 1 mile S.W. of "Closeburn. 1" Sheet 9; 6" Dumfries. 31 S.E. (''Lst. Scot.,'' 1949, p. 88).
(S34628). Bright, rose-coloured crystalline dolomite containing quartz grains, Composed of granular dolomite, 0.2–0.4 mm grain-size, powdered with ferric oxide dust and in places cemented by red ferric oxide aggregate. Composite quartz grains and grains of strained quartz up to 0.5 mm in size are scattered in small quantity throughout the rock. Ghosts of fossil fragments are outlined by varying concentration of ferruginous dust.
''Dolomite, fine-grained, zoophasmic, uneven mosaic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=342955 S34628]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121333 P552800] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121337 P552801] Mag: 40 Light: XPL
SL 143 (p. 44) Limestone. Quarry 500 yd N.E. of Caldronlee Farm, 1½ miles E.S.E. of Waterbeck. 1" Sheet 10; 6" Dumfries. 52 S.E. (''Lst. Scot.,'' 1949, p. 90).
(S34629). Pinkish, sparkling, compact limestone, composed of frag­ments of shells and polyzoa, many and various foraminifera, productid spines, ''Calcisphaera,'' and ostracods cemented in a fine-grained base of shapeless calcite and recrystallized small organic fragments. A little pyrite and probably some clay are present.
''Limestone, fine-grained, microfossiliferous, clastizoichnic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=343064 S34629]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121339 P552802] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121342 P552803] Mag: 40 Light: XPL
SL 144 (p. 44) Limestone. Quarry 100 yd N. of Cauldwellknowe Farm, nr. Kirtle Bridge station. 1" Sheet 10; 6" Dumfries. 58 N.W. (''Lst. Scot.,'' 1949, p. 89).
(S34630). Pale purplish-grey, compact, sparkling limestone, composed of fragmentary shells, foraminifera, polyzoan skeletons, crinoidal remains, spines and ''Calcisphaera,'' in a matrix of fine-grained calcite which is largely recrystallized organic debris.
''Limestone, fine-grained, microfossiliferous, clastizoichnic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=343065 S34630]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121345 P552804] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121349 P552805] Mag: 40 Light: XPL
SL 204 (p. 45) Lower Harelawhill Limestone. Quarry 150 yd N.W. of Harelawhill,3 miles N.E. of Canonbie. 1" Sheet 11; 6" Dumfries. 54 N.E. (''Lst. Scot.,'' 1949, p. 91).
(S35069). A compact brownish-grey limestone, with scarce small crinoid columnals visible. Composed of a fine-grained turbid matrix of calcite in process of recrystallization to clear granular calcite. Con­sisting essentially of finely comminuted molluscan, polyzoan and crin-oidal debris. Numerous foraminifera, spines, ''Calcisphaera'' and larger crinoidal and shell.fragments are present. Yellow bituminous matter is sparsely distributed through the rock.
''Limestone, micrograined, microfossiliferous, clastizoichnic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=343385 S35069]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121769 P552945] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121766 P552944] Mag: 40 Light: PPL
SL 205 (p. 45) Upper Harelawhill Limestone. Quarry 300 yd. W. of Harelawhill. 1" Sheet 11; 6" Dumfries. 54 N.W. (''Lst. Scot.,'' 1949, p. 91).
(S35070). A dark grey, fine-grained, compact, structureless limestone. Composed of granular calcite (0.02–0.06 mm grain-size) with inter­stitial limonitic and bituminous clay cement. Fragments of shells and black carbonaceous specks are fairly abundant and there is a little pyritic impregnation of shell fragments.
''Limestone, fine-grained, microfossiliferous, zoophasmic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=343386 S35070]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121776 P552947] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121771 P552946] Mag: 40 Light: PPL
===== East Lothian =====
SL 178 (p. 45) Limestone at base of the volcanic rocks. Quarry, 1100 yd W.10°S. of Howmuir Farm, about a mile E. of East Linton. 1" Sheet 33; 6" East Lothian 6 S.W. (''Lst. Scot.,'' 1949, p. 95).
(S34899). A dark flesh-coloured limestone composed of pisolitic and irregular masses and pellets of turbid fine-grained calcite cemented by clear calcite of grain 0.05 to 0.03 mm. The pisolitic masses, 0.2 to 4.0 mm across, are in part algal and show concentric or confocal growth structures in the centre of which chalcedonic replacement is common. Many of the smaller pisolites or pellets are structureless and may be faecal pellets or rolled fragments. Grains of radiating chalcedony occurring in the recrystallized matrix appear at times to be clastic. Ferruginous films are common around or within channels of recrystal-lization.
''Limestone, algal, clotted, micronodular, homoiolithic, mesh-crystallized.''
Limestone at base of the volcanic rocks. Quarry, 1100 yards west 10 degrees south of Howmuir Farm, about a mile east of East Linton. East Lothian. A dark flesh-coloured limestone composed of pisolitic and irregular masses and pellets of turbid fine-grained calcite cemented by clear calcite of grain 0.05 to 0.03 mm. The pisolitic masses, 0.2 tc 4.0 mm across, are in part algal and show concentric or confocal growth structures in the centre of which chalcedonic replacement is common. Many of the smaller pisolites or pellets are structureless and may be faecal pellets or rolled fragments. Grains of radiating chalcedony occurring in the recrystallized matrix appear at times to be elastic. Ferruginous films are common around or within channels of recrystallization. Limestone, algal, clotted, micronodular, homoiolithic, mesh-crystallized. SL0178. Britrocks S34899.
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=396866 S34899]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121602 P552889] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121598 P552888] Mag: 40 Light: PPL
SL 179 (p. 45) Dolomite. Left bank of Whittinghame Water, ¼ mile W.N.W. of Ruchlaw Mains. 1" Sheet 33; 6" East Lothian 11 N.W. (''Lst. Scot.,'' 1949, p. 96).
(S34900). A red colour-laminated rock, seen in thin section to be com­posed of a fine-grained aggregate of anhedral dolomite, the grains of 8 which are 0.1–0.01 mm across and are dusted with and separated by red limonite. The colour lamination corresponds to a greater or less concentration of limonite. Small rhombs of dolomite of larger size occur in sporadic cavities. Chen is abundant as irregular layers and as a pervasive infiltration; it is clearly a replacement deposit and not an infilling to fractures or cavities.
''Dolomite, cherty, ferruginous, pelitomorphic to fine-grained, banded, taxichnic.''
Dolomite. Left bank of Whittinghame Water, 0.25 mile west-north-west of Ruchlaw Mains. East Lothian. A red colour-laminated rock, seen in thin section to be composed of a fine-grained aggregate of anhedral dolomite, the grains of which are 0.1 - 0.01 mm across and are dusted with and separated by red limonite. The colour lamination corresponds to a greater or less concentration of limonite. Small rhombs of dolomite of larger size occur in sporadic cavities. Chert is abundant as irregular layers and as a pervasive infiltration; it is clearly a replacement deposit and not an infilling to fractures or cavities. Dolomite, cherty, ferruginous, pelitomorphic to fine-grained, banded, taxichnic. SL0179. Britrocks S34900.
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=390129 S34900]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121606 P552891] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121604 P552890] Mag: 40 Light: PPL
SL 199 (p. 45) Limestone. Rhodes Quarry, 1 mile E. of North Berwick. 1" Sheet 41 6" East Lothian 2 S.E. (''Lst. Scot.,'' 1949, p. 95).
(S35064). A coarse grey limestone with calcite-filled fractures. Small aggregates of tarnished pyrite are present. The thin section shows turbid, finely divided calcite, extensively replaced by coarsely granular celestine and to a less extent by clear granular calcite. Where the original rock is preserved it seems to have been a calcite-mudstone containing small pellets. The white veins in the rock are calcite. The celestine is recognized by its similarity to baryte in its optical properties and by imparting a crimson-coloured flame to the bunsen. The rock contains 25 per cent of matter which is insoluble in cold dilute HCl and practically all of this is celestine. There is also some possibly carbonaceous matter and a very little quartz and chalcedony. The celestine fragments have a blue tinge without appreciable change in absorption on rotation in polarized light.
''Limestone, micrograined, extensively replaced by celestine.''
Other specimens from Rhodes Quarry were analysed to determine the percentage of strontium sulphate with results as follows:—
a. S.E. face of quarry, 120 ft N.E. of S.E. corner. Lab. No. M27107; SrSO4, 0.32%. The rock ((S35146)) is a brownish-grey dolomitic lime­stone in which large plates of calcite enclose and cement aggregates of dolomite grains. Celestine was not observed.
b. S.W. face, 120 ft from S.E. corner, bottom 3 ft. Lab. No. M27108; SrSO4, 0.66%. A fine-grained, turbid calcilutite (S35150). Celestine was not observed.
c. as (b); 6 ft from base and 11 ft from base.. Lab. No. M27109; SrSO4, 7.45%. The rock from 6 ft above the base (S35151) consists of an extremely fine aggregate of calcite dolomitized along irregular chan­nels which are frequently expanded into spaces the centres of which are either empty or filled with kaolin. There are also large cracks which are filled by calcite and celestine. Celestine sometimes is in idiomorphic tables or blades surrounded by calcite, sometimes forms bladed aggre­gates filling the vein. Less regular bodies of celestine and calcite enclose small pieces of the calcilutite bordered by dolomite and appear to be replacements, though doubtless connected with the veins. The rock from 11 ft above the base (S35152) is a turbid calcilutite containing fragments of very fine-grained rock of the same type. The matrix is patchily recrystallized and is permeated by a considerable quantity of celestine which seems to have replaced the recrystallized calcite and now encloses the turbid calcite.
d. As (b); 14 ft from base. Lab. No. M27110; SrSO4, 14.03%. The rock (S35153) consists of a brown pelitomorphic aggregate of carbonate which develops perfect rhombic shapes against the numerous cavities and later fillings. Many of the cavities are filled by coarsely crystalline clear calcite and tables of celestine. The latter is always idiomorphic and presents sharp domal as well as basal faces to the calcite. Where calcite is absent the celestine moulds itself on the carbonate aggregate and develops good faces in the cavities. These coarsely crystalline minerals enclose spots of the brown carbonate aggregate which suggests that they are not only filling cavities but also replacing the pelitomorphic carbonate.
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=384302 S35064]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121744 P552937] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121743 P552936] Mag: 40 Light: PPL
== Carboniferous Limestone Series ==
=== Lower Limestone Group ===
==== Long Craig Upper, Hurlet, Main, &C. ====
===== Ayr =====
SL 93 (p. 45) Hawthorn Limestone. Quarry at Glenmuir Limeworks, ½ mile N.E. of High Glenmuir, 4 miles E. of Cumnock. 1" Sheet 15; 6" Ayr. 36 N.W. (''Lst. Scot.,'' 1949, p. 70).
(S34559). Reddish-grey compact limestone. Composed of small debris of shells, crinoid columnals, spines, foraminifera and polyzoan fragments set in a matrix of very fine-grained calcite which is considerably re­crystallized to larger grain of 0.02–0.03 mm. In this matrix small angular grains of quartz, shreds of white and bleached micas and traces of kaolinite are accessory. Small groups, 0.2 mm across, of small crystals of siderite with oxidized borders are scattered throughout the rock. ''Limestone, luteous, sideritic, fine-grained, microfossiliferous, clastizoic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=345935 S34559]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121062 P552710] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121064 P552711] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102766 P527952] Thin section
SL 109 (p. 46) Dockra Limestone. Hessilhead Quarry, Lugton. 1" Sheet 22; 6" Ayr. 8 N.E. (''Lst. Scot.,'' 1949, p. 74).
(S34564). Whitish-grey limestone showing shells and spines of ''Productus'' and crinoid columnals. In thin section polyzoan zoaria, crinoid columnals, shell fragments and spines form the larger constituents in a base of fine-grained, turbid calcite which is extensively recrystallized to about 0.02–0.05 mm grain-size. A few entire ostracods, foraminiferal and thin-walled shells are present. Scarce stylolitic films with associated pyrite and traces of quartz are present.
''Limestone, fine-grained, clastizoic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51133 S34564]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121098 P552722] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121101 P552723] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121405 P552824] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121409 P552825] Mag: 40 Light: XPL
SL 114 (p. 46) Hawthorn Limestone. Crossflat Burn Quarry, Muirkirk. 1" Sheet 15; 6" Ayr. 31 N.W. (''Lst. Scot.,'' 1949, p. 72).
(S34569). Cream-coloured limestone, very fine-grained and composed of a pelitomorphic aggregate of calcite granules, about 0.001 mm diameter, in which very small shell and polyzoan fragments and a considerable number of foraminiferal tests are seen. The rock is traversed by im-persistent cracks which have been filled with clear calcite.
''Limestone, pelitomorphic, microfossiliferous, subclastizoic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=345920 S34569]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121129 P552732] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121130 P552733] Mag: 40 Light: XPL
SL 149 (p. 46) Patna Limestone. Cairnshalloch Limeworks, 800 yd S.S.W. of Patna. 1" Sheet 14; 6" Ayr. 46 N.W. (''Lst. Scot.,'' 1949, p. 67).
(S34651). Compact buff-grey limestone with small crinoid fragments. Composed of a fine-grained base of granular carbonate (0.03 mm average grain-size) containing small, partly recrystallized organic debris. Opaque material occurs as grains of pyrite, pyritic replacement of minute fossils, and black bituminous or carbonaceous specks disseminated through the rock. Brownish calcareous clay is locally common. The organic remains include crinoid plates and many and various foraminifera, polyzoan fragments, brachiopod spines and thin-walled shells. ''Limestone, fine-grained, microfossiliferous, clastizoic.''
===== Bute =====
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=348364 S34651]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121375 P552814] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121379 P552815] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121381 P552816] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121385 P552817] Mag: 40 Light: XPL
SL 82 (p. 46) Corrie Limestone. Corrie Harbour, Arran. 1" Sheet 21; 6" Bute. 238 S.E. (''Lst. Scot.,'' 1949, p. 82).
(S34496). Reddish-lilac, rather earthy limestone with large ''Productus.'' Composed of granular calcite, about 0.1 mm grain, and numerous shell fragments many of which are completely recrystallized and their presence shown only by a pseudomorphous residue of original impurities. Polyzoan fragments and spines are also present. Limonitic clay is common as intergranular pellicles and granules; quartz grains are scarce. ''Limestone, argillaceous, fine-grained, zoophasmic.''
===== East Lothian =====
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=375004 S34496]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=214437 P552590] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=250329 P552591] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102323 P527827] Hand specimen
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102335 P527830] Hand specimen
SL 63 (p. 46) Long Craig Upper Limestone (probably). Quarry, Kiln Plantation, Blancc Bridge, ¾ mile E. of East Saltoun. 1" Sheet 33; 6" East Lothian 15 N.W. (''Lst. Scot.,'' 1949, p. 94).
(S34552). A pinkish-grey, compact limestone. Composed of debris of crinoids, shells, polyzoan zoaria and scarce spines and foraminifera in a matrix of calcite of grain 0.005 mm. Chalcedonic aggregates, limonitic replacements of siderite or ankerite and grains of quartz are sparsely distributed in the rock.
''Limestone, micrograined, clastizoic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=387721 S34552]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121013 P552694] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121012 P552693] Mag: 40 Light: PPL
SL 64 (p. 46) Long Craig Upper Limestone (massive band in). Shore 100 yd E. of Garlic Rock, 1 mile W. of Aberlady. 1" Sheet 33; 6" East Lothian 4 N.E. (''Lst. Scot.,'' 1949, p. 93).
(S34553). A grey and buff dolomite of varying grain. Dolomitized relics of crinoids, polyzoa and shells are indicated by concentration of mineral dust and granules of pyrite. In the grey part of the rock ferru­ginous films are abundant. The buff part is coarser in grain and there are pellicles of brown limonite on the grains of dolomite; these have re­fractive index ɷ about 1.690 indicative of a moderate content of iron carbonate. Aggregates of chalcedony occur sparsely within the crinoid pseudomorphs.
''Ferriferous dolomite, zoophasmic, uneven mosaic, taxichnic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=390122 S34553]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121021 P552696] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121016 P552695] Mag: 40 Light: PPL
SL 65 (p. 47) Long Craig Upper Limestone (probably). Quarry at Harelaw Limeworks, Longniddry station. 1" Sheet 33; 6" East Lothian 4 S.E. (''Lst. Scot.,'' 1949, p. 93).
(S34554). A compact, brownish-grey limestone composed of well-assorted fragments of crinoids, shells, polyzoa, spines and a few foraminifera and ''Calcisphaera'' in a fine matrix of calcite, 0.005–0.02 mm grain. Silica is present as chalcedonic filling in scarce, small limy pebbles. Pyritic replacement or infilling of polyzoan and foraminiferal tests is common.
''Limestone, pelitomorphic to micrograined, microfossiliferous, clastizoic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=390123 S34554]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121024 P552697] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121025 P552698] Mag: 40 Light: XPL
SL 83 (p. 47) Long Craig Upper Limestone. Oxwell Mains Limeworks, 2½ miles S.E. of Dunbar. 1" Sheet 33; 6" East Lothian 7 S.W. (''Lst. Scot.,'' 1949, p. 96).
(S34556). Brownish-grey compact limestone. Fragmentary shells and polyzoa and foraminifera, ostracods and spines are embedded in a base recrystallized to granular calcite of grain 0.05–0.3 mm. The base is turbid with specks of opaque and brown materials much of which is residual from the tests and shells of fossils which have been obliterated by the recrystallization of the base. Pellicles of limonitic clay coat the recrystallized calcite grains.
''Limestone, fine-grained, microfossiliferous, zoichnic, granular.''
Long Craig Upper Limestone. Oxwell Mains Limeworks, 2.5 miles south-east of Dunbar. East Lothian. Brownish-grey compact limestone. Fragmentary shells and polyzoa and foraminifera, ostracods and spines are embedded in a base recrystallized to granular calcite of grain 0.05 - 0.3 mm. The base is turbid with specks of opaque and brown materials much of which is residual from the tests and shells of fossils which have been obliterated by the recrystallization of the base. Pellicles of limonitic clay coat the recrystallized calcite grains. Limestone, fine-grained, microfossiliferous, zoichnic, granular. SL0083. Britrocks S34556.
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=390124 S34556]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121036 P552701] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121038 P552702] Mag: 40 Light: XPL
===== Fife =====
SL 34 (p. 47) Charlestown Station Limestone. Old Quarry, W. side of Balneil Den, ¾ mile N.E. of Colinsburgh. 1" Sheet 41; 6" Fife 22 S.W.
(S34456). Massive grey, crystalline dolomite with conspicuous crinoid ossicles. Composed of subhedral rhombs of dolomite, 0.1 to 0.5 mm grain, and larger irregularly bounded crystals representing crinoid remains which though only slightly recrystallized to small rhombs are entirely dolomite. The refractive index, ɷ = 1.695 generally but oc­casionally rather higher, indicates that the dolomite is ankerite with a content of up to 10 per cent of ferrous carbonate. Limonitic matter fills interstices and in places coats the dolomite crystals. Grains of oxidized pyrite are present.
''Ferriferous dolomite, medium-grained, zoophasmic, uneven mosaic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=384297 S34456(a)]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120497 P552512] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120501 P552513] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120504 P552514] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120506 P552515] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102228 P527803] Hand specimen
SL 37 (p. 47) Charlestown Station Limestone. Teassies Limeworks, 3 miles N. of Lundin Links station. 1" Sheet 41; 6" Fife 21 N.W.
(S34458). A grey crystalline dolomite with crinoid ossicles. Consisting of grains and rhombs of ankeritic dolomite of 0.05–0.3 mm grain-size. The refractive index, ɷ = 1.695, indicates about 20 per cent of the ferro-dolomitic component. Large grains of carbonate representing crinoid ossicles have shapeless boundaries owing to irregular replacement by smaller rhombs of dolomite but are nevertheless themselves converted to dolomite. Opaque pellicles, in part at least of pyrite, are frequent on the surface of the recrystallized carbonate grains.
''Ferriferous dolomite, medium-grained, zoophasmic, uneven mosaic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=384298 S34458(a)]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120521 P552520] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120524 P552521] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120527 P552522] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120530 P552523] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102244 P527807] Hand specimen
SL 47 (p. 47) Charlestown Station Limestone. Old Quarries, Backfield of Ladeddie. 1" Sheet 49; 6" Fife. 14 N.E. (''Lst. Scot.,'' 1949, p. 110).
(S34462). A pale grey, compact limestone, slightly dolomitic, composed of fragmentary crinoid remains with abundant polyzoan relics and some granular carbonate and kaolin in the interstices. Dr. C. J. Stubblefield has recognized the polyzoa as Trepostomatous forms including the genus ''Tabulipora.'' The rock effervesces freely with cold dilute HCl and treatment in Lemberg's solution shows that the granular carbonate of the base is mostly calcite, but some is probably dolomite. A little pyrite is present.
''Limestone, dolomitic, fossiliferous: encrinite.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=368332 S34462]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120544 P552528] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120547 P552529] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120550 P552530] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120553 P552531] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102216 P527800] Hand specimen
SL 99 (p. 47) Charlestown Station Limestone. Longcraigs Quarry, West Lomond Hill. 1" Sheet 40; 6" Fife 19 N.W. (''Lst. Scot.,'' 1949, p. 106).
(S34491). Masive grey, fine-grained dolomite. Composed of granular turbid ankeritic dolomite, ɷ about 1.695, grain 0.1–0.2 mm, in which are set large circular nests of clear granular dolomite representing crinoid columnals. Pyrite is abundant.
''Ferriferous dolomite, pyritic, fine-grained, zoophasmic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382401 S34491]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120692 P552583] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120690 P552582] Mag: 40 Light: PPL
SL 101 (p. 48) Charlestown Station Limestone (probably). N.E. Quarry, Bishop Hill, Lomond Hills. 1" Sheet 40; 6" Fife 19 S.W.
(S34493). Grey and buff, medium-grained dolomite with many cavities. Composed of coarsely granular dolomite, 1–2 mm across, with fine-grained interstitial dolomite 04 to 0.2 mm grain. Calcite is distributed in accessory amount as is shown by steady diffuse effervescence with cold dilute HCl, but the section takes no stain in Lemberg's solution. Refractive index, ɷ = 1.680 approx. shows that the dolomite is not an ankeritic variety.
''Dolomite, varigrained, mosaic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382403 S34493]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120702 P552586] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120705 P552587] Mag: 40 Light: XPL
SL 236 (p. 48) Pseudobreccia Limestone (Charlestown Station?). St Monans shore, E. of harbour. 1" Sheet 41; 6" Fife 22 S.E. (''Lst. Scot.,'' 1949, p. 110).
(S35239). Dark brownish-grey limestone with conchoidal fracture, speckled with small crinoid columnals and impregnated with pyrite in bulbous growths from which small bud-like aggregates extend. The limestone is composed of very fine debris through which foraminifera and fragments of shells and crinoid are scattered. The matrix is re­crystallized in fine-grained calcite (0.02 mm grain-size), and the outlines of the fossils are in part lost. The pyrite appears as a spongy aggregate enclosing some unaltered fossil fragments and enters as an impregnation along with mainly carbonaceous matter, into some foraminifera and shell and polyzoan fragments. A crinoid columnal is seen in process of re­placement by pyrite. Examination by reflected light shows organic structure in the opaque pyrite aggregate. The pyritic growths are thus replacement deposits in the limestone.
''Limestone, pyritic, micrograined, microfossiliferous, clastizoic, partly zoophasmic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=384315 S35239]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121880 P552982] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121883 P552983] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102993 P528023] Thin section
SL 237 (p. 48) 'White Coral or Hurlet Limestone' (Charlestown Station?). St Monans shore, E. of harbour. 1" Sheet 41; 6" Fife 22 S.E. (''Lst. Scot.,'' 1949, p.110).
(S35240). Upper 6 ft. A white limestone composed of ''Lithostrotion.'' In thin section seen to be composed of corals filled with clear, granular calcite and interstitially packed with fine debris, including shell and crinoid fragments and spines, which is considerably recrystallized. Rhombs of dolomite, probably an ankeritic variety, occur both within the corals and in the interstitial packing.
''Limestone, dolomitic, fossiliferous: coral limestone, with pelitomorphic, clastizoic mesostasis.''
(S35241). Middle 3 ft, yellow. A white crystalline dolomite with many cavities. Composed of interfering rhombs of dolomite 0.03–0.3 mm across, mostly clear, but turbid in parts which probably represent the fine debris infilling between the corals. Circular outlines marked by a concentration of turbid dust represent coral walls, but no septa are pre­served in this way.
''Dolomite, varigrained, zoophasmic, mosaic.''
(S35242). Lower 6 ft or more. A white limestone with rough fracture. Composed of the debris of crinoids, thick and thin molluscan shells, ostracods, polyzoa, spines, occasional corals and foraminifera, embedded in a matrix of very fine-grained calcite which is partially recrystallized. ''Limestone, pelitomorphic to fine-grained, clastizoic, zoophasmic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=384316 S35240]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121885 P552984] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121889 P552985] Mag: 40 Light: XPL
===== Lanark =====
SL 174 (p. 48) Main Limestone. Bankend Limeworks, ½ mile S.W. of Bankend. 1" Sheet 23; 6" Lanark. 37 S.E. (''Lst. Scot.,'' 1949, p. 138).
(S34905). A dark buff-grey limestone showing numerous productid shells and spines in hand specimen. The thin section shows large shells which are mostly arranged flatly to the bedding, numerous spines and a few foraminifera and polyzoan fragments, in a matrix of fine granular calcite of about 0.03 mm average grain-size, scantily cemented by turbid brown argillo-calcareous matter.
''Limestone, argillaceous, fossiliferous, clastizoic, bedded.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=376445 S34905]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121621 P552896] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121624 P552897] Mag: 40 Light: XPL
SL 222 (p. 48) Main Limestone. 800 yd E.S.E. of Thorntonhall station, 3 mile W. of East Kilbridge. 1" Sheet 22; 6" Lanark. 16 N.E. (''Lst. Scot.,'' 1949, p. 133).
(S35080). A compact, brownish-grey limestone. Composed of the debris of shells, crinoids, productid spines and polyzoa, together with well-preserved foraminifera of various genera, in a plentiful matrix of calcite which is now crystallized in grains averaging 0.5 mm across, but of quite variable size in different portions of the rock. Bituminous, probably argillaceous matter and carbonaceous particles are widely disseminated interstitially to the calcite. The rock contains layers in which the shell and crinoid fragments are concentrated but foraminifera scarce, and the bituminous clay is gathered into fairly persistent sinuous and branching films. Foraminifera and polyzoa are usually heavily impregnated with opaque dust.
''Limestone, fine-grained, microfossiliferous, clastizoic, bedded.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=376446 S35080]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121810 P552959] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121808 P552958] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102952 P528014] Thin section
SL 223 (p. 48) Main Limestone. Old Quarry 300 yd N.W. of Crosshouse Farm, 1½ miles S. of Hairmyres station. 1" Sheet 22; 6" Lanark. 16 S.E. (''Lst. Scot.,'' 1949, p. 133).
(S35081). A compact, dull brownish-grey limestone showing scattered small crinoid columnals. Composed of large and small debris of shells and crinoids, with many spines, scattered foraminifera and ostracods, scarce polyzoa and phosphatic fossil fragments, in a matrix of pelitomorphic calcite which is recrystallized to granular calcite of grain-size usually about 0.02 mm but varying up to about 0.15 mm in places. The section also contains one fragment of kaolin-filled cavernous limonite and two nodules of semi-opaque marl which may be faecal in origin. There is a considerable dissemination of ferruginous clay in the matrix and this is locally concentrated in thin black stylolitic films. Recrystalliz-ation has nearly obliterated many small organisms in the matrix and has affected some of the crinoid columnals.
''Limestone, pelitomorphic, microfossiliferous, clastizoic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=376447 S35081]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121813 P552960] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121817 P552961] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102956 P528015] Thin section
===== Midlothian =====
SL 19 (p. 49) Gilmerton Limestone, top (quarried). Ferniehill Quarry, Gilmerton. Sheet 32; 6" Midlothian 8 N.W. (''Lst. Scot.,'' 1949, p. 144).
(S34527). A dull grey, compact, fine-grained limestone composed of finely granular calcite, average grain-size about 0.02–0.04 mm, with recrystallized patches. There are a few bilabial sections of organisms and many tiny fragments of shell. Angular grains of quartz, granules of iron ore, and interstitial coatings of limonitic clay are present.
''Limestone, luteous, micrograined, microclastizoichnic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51097 S34527]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120842 P552637] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120845 P552638] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120851 P552640] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120850 P552639] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102153 P527783] Hand specimen
SL 20 (p. 49) Gilmerton Limestone, bottom part (mined). Locality and references as for SL 19.
(S34528). A brownish-grey, compact limestone. Composed partly of very fine-grained calcite as nodules of algal growth, partly of a compactly bedded mass of calcareous organic debris cemented by very fine-grained turbid calcite traversed by limonitic stylolitic films. The fossils present include crinoids, ostracods, polyzoa, shells, spines, and scarce phosphatic plates.
''Limestone, algal, clastizoic, bedded.''
Gilmerton Limestone, bottom part (mined). Ferniehill Quarry, Gilmerton. Mid Lothian. A brownish-grey, compact limestone. Composed partly of very fine-grained calcite as nodules of algal growth, partly of a compactly bedded mass of calcareous organic debris cemented by very fine-grained turbid calcite traversed by limonitic stylolitic films. The fossils present include crinoids, ostracods, polyzoa, shells, spines, and scarce phosphatic plates. Limestone, algal, clastizoic, bedded. SL0020. Britrocks S34528.
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51098 S34528]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120854 P552641] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120859 P552642] Mag: 40 Light: XPL
SL 46 (p. 49) Gilmerton (No. 1) Limestone. Common Hill Quarry, 670 yd S.W. of Middleton, 1" Sheet 32; 6" Midlothian 14 S.E. (''Lst. Scot.,'' 1949, p. 147).
(S34535). A grey and brownish, compact, fine-grained limestone with calcite-filled fractures. Composed of tiny calcareous fossils including foraminifera, spines, fragments of thin shells and pellets, accessory grains of quartz and granules of pyrite in a fine-grained turbid matrix of calcite, 0.01 grain, recrystallized extensively to clear calcite of grain 0.02 to 0.04 mm. In this base larger fragments of crinoid and shell and large spines are numerous.
''Limestone, pelitomorphic to micrograined, microfossiliferous, clastizoic, zoophasmic.''
===== Peebles =====
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51105 S34535]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120907 P552658] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120902 P552657] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102752 P527945] Thin section
SL 21 (p. 49) Gilmerton (No. 1) Limestone, upper part. Whitfield Limeworks, 600 yd N.W. of Deepsykehead, 1 mile S.E. of Carlops. 1" Sheet 24; 6" Peebles. 5 N.E. (''Lst. Scot.,'' 1949, p. 151).
(S34542). A dull dark grey, fine-grained limestone. Composed of small 0.02 mm, grains of calcite, chips of thin shell and small spines, quartz silt up to 0.05 mm grain, granules of iron ore, and streaks and blobs of hydrocarbon cemented by turbid, very fine-grained calcite. Heated in the closed tube the powdered rock emits a small amount of oil. ''Limestone, luteous, bituminous, micrograined, microclastizoic, bedded.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=376717 S34542]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120945 P552671] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120949 P552672] Mag: 40 Light: XPL
SL 182 (p. 49) Gilmerton (No. 1) Limestone, basal 8 ft (worked). Day level 200 yd S.E. of Whim Farm. 1" Sheet 24; 6" Peebles. 5 N.E. (''Lst. Scot.,'' 1949, p. 152).
''Cf.'' (S40470). A pale grey, massive limestone consisting of a base of calcite, 0.05 mm and smaller grain, in which are scattered abundantly fragments of shell and polyzoa and numerous crinoid columnals, foramini-fera and spines. Pyrite-impregnated zones, sometimes superimposed on large bryozoan fragments suggest algal structures.
''Limestone, micrograined, clastizoic.''
Gilmerton (No. 1) Limestone, basal 8 feet (worked). Day level 200 yards south-east of Whim Farm. Peebles. A pale grey, massive limestone consisting of a base of calcite, 0.05 mm and smaller grain, in which are scattered abundantly fragments of shell and polyzoa and numerous crinoid columnals, foraminifera and spines. Pyrite- impregnated zones, sometimes superimposed on large bryozoan fragments suggest algal structures. Limestone, micrograined, clastizoic. SL0182. Britrocks S40470.
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=376719 S40470]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122300 P553129] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122297 P553128] Mag: 40 Light: PPL
SL 183 (p. 49) Gilmerton (No. 1) Limestone, top 3 ft of lower part. Whitfield Limeworks. Locality and references as for SL 21.
Cf. (S40472)–(S40473). Grey to dark 'grey compact limestone composed of round and angular grains of calcite, 0.02–0.05 mm across, with a cement of pelitomorphic calcite and clay. Fragments of shell are common, small crinoid columnals scattered, and pieces of phosphate scarce. Small angular quartz grains, granules of pyrite and drops of bitumen ''are'' present.
''Limestone, luteous, fine-grained, clastizoichnic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=376721 S40472]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122302 P553130] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122305 P553131] Mag: 40 Light: XPL
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=376722 S40473]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122312 P553133] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122308 P553132] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84128 P531453] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84132 P531454] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84124 P531452] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84120 P531451] Thin section
===== Stirling =====
SL 159 (p. 50) Murrayshall (Hurlet) Limestone. Murrayshall Limeworks, Cambusbarron, 1½ miles S.W. of Stirling. 1" Sheet 29; 6" Stirling. 17 N.W. (''Lst. Scot.,'' 1949, p. 177).
(S34859). A black, compact, fine-grained limestone showing con-choidal fracture; specks of pyrite and crinoid columnals are sparsely distributed. Composed of a turbid, very fine-grained matrix of calcareous fossil debris, calcite granules, 0.005 mm, and probably some clay, in which are numerous fragmentary large and small shells, crinoid colum-nals, foraminifera, spines and polyzoa. Small opaque granules and wisps, fairly abundantly distributed, are largely carbonaceous, but some are of pyrite. Shreds of bleached mica are present.
''Limestone, argillaceous, pelitomorphic, fossiliferous, clastizoic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=380728 S34859]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121585 P552884] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121590 P552885] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102888 P527998] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102365 P527839] Hand specimen
==== Skateraw Middle, Charleston Green ====
===== East Lothian =====
SL 62 (p. 50) Skateraw Middle (?) Limestone. Saltoun Limeworks, quarry south of road, ¾ mile N.W. of Saltoun. 1" Sheet 33; 6" East Lothian 14 N.E. (''Lst. Scot.,'' 1949, p. 94).
(S34551). A buff-grey limestone showing crinoid ossicles. Composed of the debris of calcareous organisms, including crinoids and shells with subordinate foraminifera and spines in a matrix of calcite of grain 0.02­0–0.1 mm. The shapes of the remains are becoming indefinite through general recrystallization, and are better preserved in an irregular, dark patch which is probably a faecal pellet.
''Limestone, fine-grained, microfossiliferous, clastizoic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=390121 S34551]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120992 P552687] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120996 P552688] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102200 P527796] Hand specimen
SL 84 (p. 50) Skateraw Middle Limestone. Shore at Skateraw. 1" Sheet 33; 6" East Lothian 12 N.E. (''Lst. Scot.,'' 1949, p. 96).
(S34557). Pale brownish-grey limestone, showing scattered cleavage faces of calcite and dull dark greenish specks. The rock is composed of the debris of shells, spines, occasional ''Calcisphaera,'' foraminifera, algae and scarce crinoidal remains in a very fine-grained base of calcite granules, 0.002–0.01 mm. Locally the base is recrystallized. The walls of many of the fossil fragments are impregnated with pyrite. Bituminous matter occurs sparsely in foraminifera chambers and in small clots.
''Limestone, pelitomorphic to fine-grained, microfossiliferous, clastizoic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=390125 S34557]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121040 P552703] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121044 P552704] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121048 P552705] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121049 P552706] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102764 P527951] Thin section
===== Fife =====
SL 100 (p. 50) Charleston Green Limestone (prob.). Wilkie's Quarry, West Lomond Hill. 1" Sheet 40; 6" Fife 19 N.W.
(S34492). A blue-grey limestone, composed of granular calcite, in grains 0.02-0.05 mm across, among which the shapes of fragments of shell and crinoid are poorly preserved. Brown specks visible in hand specimen are composed of dolomite with disseminated limonitic matter.
''Limestone, dolomitic, fine-grained, zoophasmic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382402 S34492]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120695 P552584] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120698 P552585] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102315 P527825] Hand specimen
SL 235 (p. 50) Limestone, 2 ft 6 in (Charlestown Green?). St. Monans Shore, E. of harbour. 1" Sheet 41; 6" Fife 22 S.E. (''Lst. Scot.,'' 1949, p. 110).
(S35238). A grey limestone with rough texture. Composed of rather coarse shell, polyzoan and crinoidal debris in a matrix of finely divided 'Calcite and small debris containing complete foraminifera, ostracods and spines and spotted with brownish probably bituminous matter. Many of the foraminifera and some shell fragments are deeply impregnated with opaque matter, which is pyritic in some cases. The powdered rock gives off heavy oil when heated in the closed tube, and in the thin section bituminous matter is abundantly distributed as short films and small clots.
''Limestone, bituminous, microfossiliferous, clastizoic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=384314 S35238]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121874 P552980] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121877 P552981] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102987 P528022] Thin section
===== Kinross =====
SL 103 (p. 50) Charlestown Green Limestone (prob.). White Craigs Quarry, S. shoulder of Bishop Hill. 1" Sheet 40; 6" Fife and Kinross. 18 S.E.
(S40337) and (S34495). A grey and brown, crystalline dolomite with large cavities. Composed of interlocking grains of dolomite, of grain varying from 0.1 to 1.5 mm, between and among which limonitic dust is widely distributed. The sample contains bands of dolomitic chert in which whole and fragmentary crinoid plates, completely dolomitized, are numerous.
''Dolomite, zoophasmic, uneven mosaic, and dolomitic chert, taxichnic''
==== Charlestown Main, North Greens, Petershill ====
===== Fife =====
SL 8 (p. 51) Charlestown Main Limestone. Duloch Limestone Mine, Sunnybank, 1 mile N. of Inverkeithing. 1" Sheet 32; 6" Fife 39 S.W.
(S34442). A grey-brown, finely granular dolomite, of grain-size 01 mm, in which numerous crinoid columnals remain recognizable as large crystals partly replaced by the fine-grained dolomite. Tests with acid and Lemberg's solution show that the large crystals as well as the small are dolomite. A few ghosts of other organic structure persist. Black and reddish dust frequently outlines these structures and is also con­centrated where no organic structure is recognized.
''Ferriferous dolomite, medium-grained, zoophasmic, mosaic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51020 S34442]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120278 P552439] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120279 P552440] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120283 P552441] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120285 P552442] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120289 P552443] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120292 P552444] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102180 P527791] Hand specimen
SL 9 (p. 51) Charlestown Main Limestone. Roscobie Quarry and mine, 3 miles N. of Dunfermline. 1" Sheet 40; 6" Fife 34 N.W. (''Lst. Scot.,'' 1949, p. 102; see also No. SL 226 p. 121).
(S34443). A very dark grey limestone containing numerous large crinoid ossicles. Unsorted complete and fragmentary crinoid ossicles, preserved in coarsely granular calcite, are embedded in a matrix of microgranular calcite and small recrystallized fossil debris. Black, carbonaceous matter is locally abundant interstitially to the calcite matrix. A small amount of dolomite is present in the larger, recrystal­lized shell fragments.
''Limestone, dolomitic, varigrained, zoophasmic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382393 S34443(a)]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120296 P552445] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120299 P552446] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120301 P552447] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120305 P552448] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102165 P527787] Hand specimen
SL 10 (p. 51) Charlestown Main Limestone, Chapel Quarry, about 2 miles N.W. of Kirkcaldy. 1" Sheet 40; 6" Fife 35 N.E. (''Lst. Scot.,'' 1949, p. 104; also J. Phemister and A. G. MacGregor, ''Mineralogical Mag., vol.'' xxvi, 1942, pp. 275–282. See also Nos. SL 210–215 below).
(S34444). Dark grey limestone mottled with white powdery material. (Specimen from about 6–8 ft above the quarry floor). Composed of granular carbonate, 01 mm grain-size, with debris of shells and crinoids. Nests of more coarsely granular carbonate have a dusky brown appear­ance. Lemberg's test shows that the carbonate is all calcite. Some bands of the rock are rich in tiny grains, giving square and six-sided sections, of garnet (grossular) and also in poorly shaped crystals of datolite. The largest garnet grains are about 0.08 mm across.
''Limestone with calc-silicates, varigrained, zoophasmic.''
E 34445. Pale grey limestone with pink and white patches. (Specimen from near the quarry floor). The rock is partly a limestone composed of organic debris with abundant echinodermal fragments. Throughout this portion grains of datolite and garnet are common. Part of the rock is more shaly, enclosing crinoid remains. This portion is brown and opaque, but near the edge of the slide it shows fibres and a multitude of minute grains and prisms with high extinction angle. 'Pectolite has been observed as the main constituent of two very thin sinuous and im-persistent veins in one of which the pectolite is locally replaced by apophyllite.' (Phemister and MacGregor, ''op. cit.).''
''Limestone with calcsilicates, fine-grained, zoichnic, bedded.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382394 S34444]
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382395 S34445(a)]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120308 P552449] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120309 P552450] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120312 P552451] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120317 P552452] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120318 P552453] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120321 P552454] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120325 P552455] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120328 P552456] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120332 P552457] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120335 P552458] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120337 P552459] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120339 P552460] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120344 P552461] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120347 P552462] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120349 P552463] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120352 P552464] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120355 P552465] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120358 P552466] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120361 P552467] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120364 P552468] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120367 P552469] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120371 P552470] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120374 P552471] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120377 P552472] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120380 P552473] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120382 P552474] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120387 P552475] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120388 P552476] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120391 P552477] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120396 P552478] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102695 P527927] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102188 P527793] Hand specimen
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102147 P527781] Hand specimen
SL 48 (p. 51) Charlestown Main Limestone, basal part. Cults and Pitlessie Limeworks, 4 miles S.S.W. of Cupar. 1" Sheet 40; 6" Fife 13 S.E.
(S34463). A dark grey, compact limestone composed of fragments of crinoids, shells and polyzoa and of foraminifera, in a fine granular calcite base. The polyzoa are often outlined in opaque matter sometimes recognizable as pyrites, and local concentrations of black, possibly carbonaceous, matter are numerous. Bitumen is present in small quantity as tiny wisps and clots.
''Limestone, varigrained, microfossiliferous, in part zoophasmic, clasti zoich-nic, bedded.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382396 S34463(a)]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120557 P552532] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120559 P552533] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120564 P552534] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120565 P552535] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102220 P527801] Hand specimen
SL 49 (p. 51) Charlestown Main Limestone, main seam workings. Cults and Pitlessie Limeworks. 1" Sheet 40; 6" Fife 13 S.E. (''Lst. Scot.,'' 1949, p. 109)
(S34464). Brownish-grey, compact, finely granular limestone composed largely of the debris of shells, polyzoa and foraminifera in a base of small grains of calcite. Treatment in Lemberg's solution shows that the carbonate is dominantly calcite, but some turbid foraminifera and shell fragments do not stain or stain only slightly. Brown interstitial films and scraps of bitumen are abundant and grains of pyrite sparse.
''Limestone, fine-grained, microfossiliferous, clastizoic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382397 S34464(a)]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120569 P552536] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120572 P552537] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120576 P552538] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120577 P552539] Mag: 40 Light: XPL
SL 50 (p. 51) 'Thin Limestone above the Hurlet' (Charlestown Main?). Old West Quarry, Forthar Old Limeworks, 1 mile E.S.E. of Freuchie. 1" Sheet 40; 6" Fife 20 N.W.
(S34465). A dark calcareous dolomite with ''Lithostrotion.'' The corals, com­pletely recrystallized but occasionally showing traces of septa in the form of trains of mineral particles, are set in a matrix of granular carbonate, coloured brownish by carbonaceous matter, and clear shell fragments. A little pyrite is present. The dolomite is ferriferous, the ordinary refractive index varying about 1.697. Immersion in logwood stain failed to reveal calcite, and staining by the silver nitrate-potassium chromate method as modified by H. E. Wilson produced a general pinkish stain with numerous minute points of concentration. Since the chemical analysis indicates the presence of excess calcite over the proportions required for ferriferous dolomite, the failure of the staining method to reveal discrete crystals of calcite suggests that the excess carbonate is present in solid solution in the dolomite.
''Ferriferous dolomite, fine-grained, zoichnic, taxichnic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382398 S34465]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120580 P552540] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120584 P552541] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120587 P552542] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120591 P552543] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120593 P552544] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120595 P552545] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102734 P527936] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102236 P527805] Hand specimen
SL 97 (p. 52) Charlestown Main Limestone (prob.). Easter Glasslie, 2½ miles N. of Leslie. 1" Sheet 40; 6" Fife 19 N.W. (''Lst. Scot.,'' 1949, p. 107).
(S34489). Grey, brownish weathering dolomite, composed of irregular, interlocking grains of turbid dolomite, 0.5–0.2 mm, with accessory pyrite and disseminated fine carbonaceous particles.
''Dolomite, varigrained, zoophasmic, diacrystallic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382399 S34489(a)]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120666 P552568] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120667 P552569] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120672 P552570] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120674 P552571] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120677 P552572] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120680 P552573] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102738 P527938] Thin section
SL 98 (p. 52) Charlestown Main Limestone. East Lomond Quarry, at base of East Lomond Hill, about 1¼ miles S.W. of Falkland. 1" Sheet 40; 6" Fife 19 N.E. (''Lst. Scot.,'' 1949, p. 106).
(S34490). Dark, grey, saccharoidal limestone composed of inequigranular calcite, 0.05–0.5 mm, with much opaque, argillaceous material, including oxidized pyrite and carbonaceous matter, distributed through the rock.
''Limestone, argillaceous, medium grained, zoophasmic, granular.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382400 S34490]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120687 P552575] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120683 P552574] Mag: 40 Light: PPL
SL 121 (p. 52) Charlestown Main Limestone. Invertiel Quarry, 1 mile S.S.W. of Kirkcaldy. 1" Sheet 40; 6" Fife 35 S.E.
(S34594). Pale grey, compact dolomite with argillaceous films. The thin section shows a mass of fossil fragments, mainly large and small crinoidal remains, spines, shells and thick-walled cellular structures in a finely granular cement of carbonate and opaque clay. A few thick siliceous spines, with carbonate-filled canal, are present. Granules of pyrite and shreds of carbonaceous matter are abundant.
''Dolomite, argillaceous, clastizoic, bedded.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382408 S34594]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121273 P552780] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121275 P552781] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102275 P527815] Hand specimen
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102267 P527813] Hand specimen
SL 210 (p. 52) Charlestown Main Limestone, 22–23 ft from base of quarry face. Chapel Limestone Quarry, about 2 miles N.W. of Kirkcaldy. 1" Sheet 40; 6" Fife. 35 N.E. (''Lst. Scot.,'' 1949, p. 104; also J. Phemister and A. G. MacGregor, ''Mineralogical Mag., vol.'' xxvi, 1942, pp. 275–282; see also SL 10, p. 117).
(S35900). Coarse, bluish dolomite mottled with duller, cream-coloured dolomite. The section shows dolomite in crystals up to 1.0 mm in size, mostly of irregular shape, but often showing rhomboidal angles. Inter­stitial between the grains is a patchy cement of clay aggregate, faintly yellowish-green in places and possessing a moderate birefringence. A little secondary quartz is present and pyrite occurs in small scattered grains. The dolomite usually shows undulose extinction.
''Dolomite with clay aggregate, medium-grained, uneven mosaic, strained.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382421 S35900]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122215 P553094] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122218 P553095] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84077 P531440] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84073 P531439] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102396 P527851] Hand specimen
SL 211 (p. 52) Charlestown Main Limestone, 12–22 ft above base of quarry face. Locality and references as for SL 210.
(S35901). Grey compact, translucent limestone, with numerous spots of a white fibrous mineral. The rock is composed of granular calcite, of 0.1–0.4 mm grain-size, together with larger grains, up to 0.5 mm long, in which the trabecular structure and axial canals of crinoids may be retained. Large plumose aggregates of prismatic and acicular pectolite are numerous. Garnet is uniformly scattered through the rock in small idio-blastic crystals up to 0.1 mm diameter, and datolite, in irregular grains, is scarce.
''Limestone with calcsilicates, varigrained, zoophasmic, diacrystallic, in part granobiastic.''
p>Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382422 S35901]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122222 P553097] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122220 P553096] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102408 P527854] Hand specimen
SL 212 (p. 52) Charlestown Main Limestone, 9–12 ft above base of quarry face. Locality and references as for SL 210.
(S35902). Compact grey limestone permeated with and containing compact aggregates of greenish-yellow structureless clay and also some microcrystalline greenish-white aggregates. The limestone is com­posed of granular calcite of 0.1 mm grain-size and over, with occasional relict organic structures of which the most conspicuous are foraminifera, within the chambers of which the calcite is coarsely recrystallized. Spines and occasional crinoid ossicles are also obvious. Masses of an almost opaque, finely divided clay aggregate are abundant in patches. Garnet is locally developed in dodecahedra and in irregular grains or aggregates up to 0.2 mm across and the microcrystalline greenish aggregate seen in hand specimen is largely grossular. No datolite was found.
''Limestone with calcsilicates, varigrained, zoophasmic, in part granoblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382423 S35902]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122225 P553098] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122229 P553099] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84084 P531442] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84080 P531441] Thin section
SL 213 (p. 53) Charlestown Main Limestone, 6–9 ft above base of quarry face. Locality and references as for SL 210.
(S35903). Dull grey limestone with numerous white spots and scarcer pale green spots, and with a band in which a greenish mineral is more abundant than calcite and is streaked out parallel to the band. The lime­stone is composed of granular calcite, 0.02 mm–0.6 mm grain-size, together with numerous large grains representing crinoid ossicles. Relict organic structures are preserved by outlines in clay, and shapeless masses of opaque clay are abundant. Also aggregates of translucent cryptocrystalline, moderately birefringent material are common. No datolite or garnet was seen. The white spots seen in the specimen are not pectolite, but a finely divided flaky aggregate of moderate bire­fringence, perhaps talc. (Note: talc or steatite was identified in other specimens; see J. Phemister & A. G. MacGregor, ''Mineralogical Mag., vol.'' xxvi, 1942).
''Limestone with talc, varigrained, zoophasmic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382424 S35903]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122235 P553101] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122231 P553100] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102412 P527855] Hand specimen
SL 214 (p. 53) Charlestown Main Limestone, 3–6 ft above base of quarry face. Locality and references as for SL 210.
(S35904). Dark grey limestone with grey spots, passing to yellowish-grey overall with black streaks and a pale green mineral filling spaces lined with black material. The dark part is well crystallized to irregular granular calcite of varying size and uniformly permeated by brown dust or stain. This portion still contains crinoid ossicles and outlines of shells in both cases recrystallized, though the former may still be of one piece and retain trabecular structure. The paler coloured limestone is little different, except in smaller grain-size and absence of brown coloration in the calcite. Garnet (grossular) is well distributed throughout the whole rock. Only a small quantity of fine-grained, almost opaque, aggregate is present in the section.
''Limestone with garnet, varigrained, zoophasmic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382425 S35904]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122239 P553102] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122242 P553103] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84092 P531444] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84096 P531445] Thin section
SL 215 (p. 53) Charlestown Main Limestone, from base to 3 ft above base of quarry face. Locality and references as for SL 210.
(S35905). Grey limestone with patches of lustreless greenish clay. The rock is composed of slightly recrystallized granular calcite, 0.02–0.2 mm, in which crinoid ossicles (not recrystallized), shells and recrystallized ostracods are numerous. There are also several foraminifera whose walls are replaced by garnet. A semi-opaque, white, fibrous aggregate forms a patchy cement and minute garnets occur singly or in aggregates in considerable quantity scattered through the rock.
''Limestone with garnet, fine-grained, zoichnic.''
Charlestown Main Limestone, from base to 3 feet above base of quarry face.Chapel Limestone Quarry, about 2 miles north-west of Kirkcaldy. Fife Region. Grey limestone with patches of lustreless greenish clay. The rock is composed of slightly recrystallized granular calcite, 0.02 - 0.2 mm, in which crinoid ossicles (not recrystallized), shells and recrystallized ostracods are numerous. There are also several foraminifera whose walls are replaced by garnet. A semi-opaque, white, fibrous aggregate forms a patchy cement and minute garnets occur singly or in aggregates in considerable quantity scattered through the rock. Limestone with garnet, fine-grained, zoichnic. SL0215. Britrocks S35905.
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382426 S35905]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122245 P553104] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=124237 P553105] Mag: 40 Light: XPL
SL 224 (p. 53) Charlestown Main Limestone, higher, dolomitic part. N. end of West Quarry, Charlestown, 3 miles S.W. of Dunfermline. 1" Sheet 32; 6" Fife 38 S.E. (''Lst. Scot.,'' 1949, pp. 101–2; see also SL 276, below).
(S35082). A buff microcrystalline dolomite with many cavities which are surrounded by iron staining. Composed of turbid grains, rhomboid and irregular 0.1–0.25 mm across, of dolomite. Diffuse curved outlines of shells and crinoid columnals are preserved as single crystals of dolomite. There are a few small irregular grains of chert and secondary quartz and of composite granular quartz probably of detrital origin. The well preserved crinoid columnals can be seen in the hand specimen. They do not react with cold dilute acid but usually active effervescence can be seen on their borders or in the canal. No calcite can be distinguished in these positions in the section. Occasionally a crinoid columnal is considerably replaced by secondary quartz in which trabecular structure may be retained.
''Dolomite, varigrained, zoophasmic, holey, uneven mosaic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51633 S35082]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121821 P552962] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121824 P552963] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102960 P528016] Thin section
SL 225 (p. 53) Charlestown Main Limestone, worked portion. Locality and references as for SL 224.
(S35083). A dull, compact brownish-grey limestone. Calcite occurs filling joints. Composed of a matrix of brown clay and calcite mud filled with a calcite sand, flattened fragments of thin shells and fragments of crinoids and of shelly crinoidal limestone which has been soft when incorporated in the deposit. These limestone fragments have probably been derived from layers of clay-free calcareous debris one of which is seen in the section. In the most clayey portion of the section there are stylolitic films of carbonaceous or bituminous matter. Larger fragments of crinoid and coral are scattered in the fine-grained argillaceous lime­stone.
''Limestone, argillaceous, pelitomorphic, clastizoic, bedded.''
Charlestown Main Limestone, worked portion. North end of West Quarry, Charlestown, 3 miles south-west of Dunfermline. Fife Region. A dull, compact brownish-grey limestone. Calcite occurs filling joints. Composed of a matrix of brown clay and calcite mud filled with a calcite sand, flattened fragments of thin shells and fragments of crinoids and of shelly crinoidal limestone which has been soft when incorporated in the deposit. These limestone fragments have probably been derived from layers of clay-free calcareous debris one of which is seen in the section. In the most clayey portion of the section there are stylolitic films of carbonaceous or bituminous matter. Larger fragments of crinoid and coral are scattered in the fine-grained argillaceous limestone. Limestone, argillaceous, pelitomorphic, clastizoic, bedded. SL0225. Britrocks S35083.
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51634 S35083]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121830 P552965] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121826 P552964] Mag: 40 Light: PPL
SL 226 (p. 53) Charlestown Main Limestone, 2–5 ft above dolerite sill. Mine, at N.W. end of Roscobie Quarry. 1" Sheet 40; 6" Fife 33 N.E. (''Lst. Scot.,'' 1949, p. 103; see also SL 9 above).
(S35084). A grey limestone with a greenish tinge, with rough fracture and altered aspect. Composed of a mosaic of clear granular calcite of varying grain-size (0.01–0.2 mm). In this are scattered numerous relics of crinoid columnals and shells. The shape of the columnals is retained but the plates are recrystallized to granular aggregates. The shape of the shells is very largely lost through recrystallization. There is a con­siderable quantity of clear interstitial substance amongst the calcite mosaic. This is an aggregate of very small fibres and scales insoluble in cold dilute HCl and appears as a greenish clay when the calcite is dissolved out. When thus separated the colour of the mineral is in general pale greenish, but often yellow and occasionally brown; from its optical properties it seems to be an antigoritic chlorite. Small black grains are scattered in accessory proportions in the rock and larger grains of pyrite are scarce.
''Limestone with chlorite, clastizoic, zoichnic, granular.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382450 S35084]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121835 P552967] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121831 P552966] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102963 P528017] Thin section
SL 234 (p. 54) Charlestown Main Limestone (?). St. Monans shore, E. of harbour 1" Sheet 41; 6" Fife 22 S.E.
(S35237). A dull grey dolomite showing crinoid ossicles: these do not effervesce in cold dilute HCl, but a slight overall effervescence in the rock shows the dissemination of calcite. The section shows large crinoid columnals and shell fragments, the structure of which is destroyed by recrystallization, in a ground of dolomite, of grain-size 0.02–0.1 mm, coloured brown by disseminated bituminous clay. Stylolitic films separ­ate bands of debris of differing grain-size. There are a few small brown isotropic phosphatic fossil fragments. The crinoid columnals are pre­served in dolomite though generally retaining their single crystal struc­ture and enclosing small rhombs of dolomite. The dolomite is ferriferous, the ordinary refractive index being 1.695.
''Ferriferous dolomite, fine-grained, clastizoichnic, taxichnic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=384313 S35237]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121868 P552978] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121871 P552979] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102985 P528021] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102448 P527864] Hand specimen
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102444 P527863] Hand specimen
SL 276 (p. 54) Charlestown Main Limestone, top 7 ft in N.W. corner of West Quarry, Charlestown Quarries, 3 miles S.W. of Dunfermline. 1" Sheet 32; 6" Fife 38 S.E. (see also SL 224 and SL 225 above).
(S35799). A brownish, compact dolomitized limestone, having a crystal­line appearance due to the abundance of crinoid plates. It is composed of fossil debris consisting essentially of crinoidal and polyzoan fragments; subordinate fossil components include shells, spines, foraminifera, siliceous spicules and scarce phosphatic fragments. Parts of the rock are completely dolomitized; in other parts, while the matrix is recrystal­lized in dolomite and partly replaced by quartz, the larger fossil struc­tures remain wholly or in part of calcite.
''Limestone, dolomitic, fossilzferous, clastizoic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=52318 S35799]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122138 P553068] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122143 P553070] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122145 P553071] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122148 P553072] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122150 P553073] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=124234 P553069] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84049 P531433] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102496 P527876] Hand specimen
SL 277 (p. 54) Charlestown Main Limestone, top 1 ft 6 in. Bogie Mains Quarry, 1 mile N.W. of Kirkcaldy station. 1" Sheet 40; 6" Fife 35 N.E. (''Lst. Scot.,'' 1949, p. 105).
(S35800). Dark grey rock with white angular specks, showing a faint undulating lamination. In thin section, consists of a matrix of fine-grained silica and obscure opaque material, in which are embedded numerous bodies of round, rectangular or less regular shapes, sometimes showing relics of shell structure. These may be composed entirely of cherty silica, of silica and prochlorite, silica and dolomite, or of all three; or they may be entirely of chlorite or of dolomite. Only in one large dolomite-silica fragment was the trabecular structure of a crinoid recognized. The chlorite is pleochroic from yellow to colourless. The rock appears to be a silicified shale, originally calcareous and rich in fossil debris. The large amount of chlorite suggests that pyroclastic material formed part of the original sediment. The silica available for silicification may also have been of volcanic origin.
''Dolomitic chert, bedded.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382456 S35800]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122153 P553074] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122156 P553075] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84053 P531434] Thin section
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102484 P527873] Hand specimen
SL 278 (p. 54) Charlestown Main Limestone, 1 ft 6 in-8 ft from top. Locality and references as for SL 277.
(S35801). A pale grey limestone with a coarse appearance due to the abundance of large crinoidal remains. Consists of large and small crinoid ossicles cemented by a matrix partly of very finely divided calcite, partly of clear granular carbonate, having the rhomboid shape of dolo­mite and with subordinate clay mineral. Small and extensive areas of silicification are numerous and black carbonaceous shreds are abundant in association with the clay.
''Limestone, dolomitic, silicified, crinoidal: encrinite.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=381858 S35801]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122159 P553076] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122164 P553077] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122165 P553078] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122169 P553079] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102480 P527872] Hand specimen
SL 279 (p. 54) Charlestown Main Limestone, top 10 ft at E. end of quarry face. Glenniston Quarry, 1 mile N. of Auchtertool. 1" Sheet 40; 6" Fife 35 N. W., S.W., (''Lst. Scot.,'' 1949, p. 105).
(S35802). A compact, fawn-coloured dolomite with crinoid ossicles which effervesce slightly with cold dilute HCl. Composed of interlocking grains of dolomite, 01–0.2 mm across, amongst which there are single crystal dolomite replacements of crinoid ossicles and coarsely crystalline aggregates after shell casts. There is great variation in the degree of preservation of the original outline of the organic constituents, some ossicles and shell casts being perfect, while others are mere indications. Calcite was not distinguished as such, but must be fairly uniformly present through the rock on the evidence of slight overall effervescence with cold dilute HCl.
''Dolomite, calcareous, varigrained, zoichnic, uneven mosaic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382457 S35802]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122173 P553080] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122176 P553081] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84057 P531435] Thin section
SL 280 (p. 54) Charlestown Main (Seafield Tower) Limestone, lowest 3½ ft. Shore S. of Seafield Tower, Kirkcaldy. 1" Sheet 40; 6" Fife 40 N.E. (''Lst. Scot.,'' 1949, p. 106).
(S35803). A brown, compact, microcrystalline dolomite showing slight overall effervescence in cold dilute HCl. Crinoid ossicles unaffected by cold dilute HCl are scattered in the rock. In thin section the rock is a dolomite of very variable grain, parts being of 0.1 mm grain-size and cemented by limonitic clay, most being about 0.2 mm grain-size, but large areas show recrystallized dolomite of grain 0.5–1.0 mm across. In this rock there is much more disseminated limonite (or limonitic clay) than in (S35802) (see SL 279 above), and because of original im­purities having impregnated the carbonate of the crinoids, the trabecular structure is extensively preserved in spite of the dolomitization, which may have completely destroyed all other evidence, including shape. ''Dolomite, varigrained, zoophasmic, diacrystallic, homoiolithic.''
===== Kinross =====
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382458 S35803]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122180 P553083] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122178 P553082] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84061 P531436] Thin section
SL 102 (p. 55) Charlestown Main Limestone. Clatteringwell Quarry, Bishop Hill, about 1 mile N.E. of Kinnesswood. 1" Sheet 40; 6" Fife & Kinross. 18 S.E. (''Lst. Scot.,'' 1949, p. 129).
(S34494). Pale brownish, greenish-mottle limestone composed of crinoid and shell fragments in a fine calcareous base in which finely divided chlorite is locally abundant and tiny crystals of pyrite are universally present. The fossil fragments are greatly recrystallized, but trabecular structure is commonly preserved, even when replacement by calcite-chlorite aggregate has occurred. The residue from solution in cold dilute HCl includes grossular, forsterite, diopside, opaque spinellid, and brookite, rutile and zircon.
''Limestone with chlorite, pelitomorphic, clastizoic, zoichnic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382404 S34494]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120709 P552588] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=238388 P552589] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102271 P527814] Hand specimen
SL 231 (p. 55) Charlestown Main Limestone, typical sample from working face. Clatteringwell Quarry. Locality and references as for SL 102.
(S35470). A blue-grey and whitish, fine-grained saccharoidal limestone, composed of granular anhedral calcite, varying irregularly in grain from 0.03 to 0.5 mm and in places showing regular changes in grain over areas which represent fossil structures. Small garnets, 0.05–0.15 mm across are common and there are some groups of small oxidized pyrite cubes.
''Limestone, with garnet, varigrained, zoophasmic, in part granoblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382451 S35470]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122105 P553057] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122102 P553056] Mag: 40 Light: PPL
SL 232 (p. 55) Charlestown Main Limestone, from lower half of quarry face a short distance above a 200-ft quartz-dolerite sill. Clatteringwell Quarry. Locality and references as for SL 102.
(S35471), (S35472). (S35471) is a whitish fine-grained and (S35472) a blue-grey and greenish-grey saccharoidal limestone. In thin section both show numerous pseudomorphs, in granular calcite, of crinoid columnals, trabecular structure being retained and picked out by impregnations of opaque dust around the pores (S35471). Shell moulds and debris of productid spines, shelly and echinodermal material and possibly fora-minifera are present in (S35472). In the latter specimen however, colourless garnets also are abundant and there is a large amount of cementing material composed of birefringent, semi-opaque fibrous aggregate from which garnet appears to be in process of development. The garnet is a lime-garnet with a refractive index indicating about 12 per cent of the andradite molecule. The fibrous aggregate is a mixture of minerals difficult to discriminate but including chlorite, muscovite, an antigoritic mineral, and a little diopside.
''Limestone, with calcsilicates, varigrained, zoophasmic, granular to granoblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382453 S35472]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122112 P553059] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122108 P553058] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84034 P531429] Thin section
===== Midlothian =====
SL 41 (p. 55) North Greens (No. 2) Limestone, basal 15 ft. Middleton Limeworks, Middleton. 1" Sheet 32; 6" Midlothian 14 S.E. (''Lst. Scot.,'' 1949, p. 146)
(S34529). Compact, grey limestone composed of finely granular calcite, 0.01–0.1 mm grain-size, enclosing debris of small shells, foraminifera, vermiform algae encrusting crinoid and shell fragments, small bodies giving horned hemispherical sections, occasional larger fragments of crinoid and shell and thin-walled bodies, apparently ostracods. ''Limestone, micrograined, microfossiliferous, clastizoic.''
(S34530). Compact, darker grey limestone containing larger and less recrystallized organic remains than (S34529). Fragments of crinoids, large shells, foraminifera, tubular bodies, small shells and some septate small bodies are numerous; polyzoa are present. The matrix is of granular calcite, averaging 0.5 mm grain, cemented by finely divided calcite and bituminous matter, and contains occasional faecal pellets. ''Limestone, fine-grained, microfossiliferous, clastizoic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51099 S34529]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120864 P552644] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120861 P552643] Mag: 40 Light: PPL
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51100 S34530]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120866 P552645] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120871 P552646] Mag: 40 Light: XPL
SL 42 (p. 55) North Greens (No. 2) Limestone, upper 30 ft of bed. Middleton Quarry, 1100 yd S.W. of Middleton. References as for SL 41.
(S34531). A fine uniform grained, fawn-grey limestone, composed of recrystallized grains of calcite (0.05 mm grain-size) cemented by limon-itic clay which is locally abundant and impregnated with black matter. Isolated fragments of polyzoa, thin-walled valves and foraminifera are preserved.
''Limestone, fine-grained, microfossiliferous, clastizoichnic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51101 S34531]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120875 P552648] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120872 P552647] Mag: 40 Light: PPL
SL 55 (p. 55) North Greens (No. 2) Limestone, basal mined band. Quarry on left bank of Tyne Water, 200 yd N. of Currie Lee Limeworks, 3 miles E. of Gorebridge. 1" Sheet 32; 6" Midlothian 15 N.W. (''Lst. Scot.,'' 1949, p. 147).
(S34536). Compact, fawn-grey limestone composed of finely triturated debris of calcareous organisms with numerous fragments of small shells and many foraminifera and scarcer spines, ''Calcisphaera,'' polyzoan and algal fragments, and small faecal pellets, in a recrystallized base of finely granular calcite.
''Limestone, micrograined, microfossiliferous, clastizoichnic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51106 S34536]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120909 P552659] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120913 P552660] Mag: 40 Light: XPL
SL 56 (p. 56) North Greens (No. 2) Limestone. Quarry 400 yd N. 5° E. of D'Arcy Farm, 2¼ miles S.E. of Dalkeith. 1" Sheet 32; 6" Midlothian 8 S.E. (''Lst. Scot.,'' 1949, p. 147).
(S34537). Platy, dark grey, calcareous shale. The section shows a brown-stained, isotropic, argillaceous base in which are set very numerous fragments of calcareous organisms, including echinoderms and shells, prisms of calcite showing rectangular and occasional hexagonal sections, and small bodies giving circular sections. A few small grains of quartz are present and specks of carbonaceous and bituminous matter are abundant.
''Calcareous shale, clastizoic.''
(S34538). The section shows a more intimate mixture of argillaceous and fine calcareous material enclosing many small crinoid columnals and some shell fragments.
''Calcareous shale, clastizoic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51108 S34538]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120924 P552664] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120922 P552663] Mag: 40 Light: PPL
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51107 S34537]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120916 P552661] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120918 P552662] Mag: 40 Light: XPL
SL 57 (p. 56) North Greens (No. 2) Limestone, top half of upper band. Quarry 160 yd N.W. of Northfield, Cousland Lime Workings, 2½ miles E.N.E. of Dalkeith. 1" Sheet 32; 6" Midlothian 8 N.E. (''Lst. Scot.,'' 1949, p. 147–8).
(S34539). A grey and brownish, earthy limestone. The section shows almost equal proportions of brown argillaceous and calcareous material, among which thin rectangular sections (possibly pieces of thin-walled shells) are prominent. Remains of crinoids, polyzoa, shells and spines can be recognized but for the most part the calcareous material is small platy debris. Angular grains of quartz and shreds of muscovite and bleached biotite are common throughout the rock.
''Calcareous shale, clastizoic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51109 S34539]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120928 P552665] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120931 P552666] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102754 P527946] Thin section
SL 58 (p. 56) North Greens (No. 2) Limestone, bottom half of upper band. Locality and references as for SL 57.
(S34540). A dull grey, very fine-grained limestone composed of fine debris and fragments of calcareous organisms with a considerable amount of brownish argillaceous matter. A few small crinoidal and foraminiferal remains are scattered through the rock. Small angular quartz grains are present and specks of carbonaceous and bituminous matter are evenly disseminated.
''Limestone, luteous, micrograined, microclastizoic.''
North Greens (No. 2) Limestone, bottom half of upper band. Quarry 160 yards north-west of Northfield, Cousland Lime Workings, 2.5 miles east-north-east of Dalkeith. Mid Lothian. A dull grey, very fine-grained limestone composed of fine debris and fragments of calcareous organisms with a considerable amount of brownish argillaceous matter. A few small crinoidal and foraminiferal remains are scattered through the rock. Small angular quartz grains are present and specks of carbonaceous and bituminous matter are evenly disseminated. Limestone, luteous, micrograined, microclastizoic. SL0058. Britrocks S34540.
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51110 S34540]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120934 P552667] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120935 P552668] Mag: 40 Light: XPL
SL 59 (p. 56) North Greens (No. 2) Limestone, lower massive half. Locality and references as for SL 57.
(S34541). Bedded limestone composed largely of fragments of calcareous organisms with cementing fine calcareous debris and some argillaceous and bituminous matter. Crinoids, foraminifera, shells and polyzoan fragments are numerous and lie with their flatter surfaces along the bedding.
''Limestone, pelitomorphic, clastizoic, bedded.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51111 S34541]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120943 P552670] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120938 P552669] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102756 P527947] Thin section
SL 81 (p. 56) North Greens (No. 2) Limestone. Upper Side Quarry, 100 yd S.S.W. of Fountainside, 2½ miles S.W. of Temple. 1" Sheet 32; 6" Midlothian 20 N.W. (''Lst. Scot.,'' 1949, p. 146).
(S34555). Compact, dark grey limestone. Partly recrystallized fragments of thin shells, scarce foraminifera, scarce small shells filled with clear granular calcite, numerous pyrite-impregnated straight and curved fragments and very scarce polyzoan fragments are embedded in a base of very fine-grained, granular calcite and probably clay. The grain of the base increases in places to 0.03 mm size. The rock is traversed by very thin impersistent calcite-filled fractures. A few small crystals of a yellow, highly refractive, isotropic mineral taken to be sphalerite occur in a shell and a spine.
''Limestone, luteous, pelitomorphic, clastizoichnic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51124 S34555]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121028 P552699] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121033 P552700] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102762 P527950] Thin section
===== Peebles =====
SL 23 (p. 56) North Greens (No. 2) Limestone. Bents Quarry, 600 yd N. of Macbiehill House. 1" Sheet 24; 6" Peebles. 5 S.E. (''Lst. Scot.,'' 1949, p. 152)
(S34544). Fawn-grey, compact limestone composed of fragments of crinoids, shells and polyzoa in a turbid base partly of granular calcareous debris, partly pelitomorphic calcite. Foraminifera are present and these and polyzoan chambers are occasionally filled with glauconitic mineral aggregate. Pyrite and fossil phosphate are accessory. Thin calcite veins cut the rock.
''Limestone, fine-grained, clastizoic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=376638 S34544]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120960 P552676] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120956 P552675] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102184 P527792] Hand specimen
===== West Lothian =====
SL 51 (p. 57) Petershill Limestone, near top. Quarry 1000 yd N. 5" E. of north-east end of Petershill Reservoir, near Bathgate. 1" Sheet 31; 6" West Lothian N.S. 9 N.E. (''Lst. Scot.,'' 1949, p. 195).
(S34446). A brown, coarse-grained limestone composed mainly of whole and fragmentary crinoid ossicles with granular calcareous debris and rhombs of dolomite, scarce shell debris and a few ooliths in the interstices. There is a little pyrite and some phosphatic material. Bituminous matter is disseminated in the interstitial carbonate.
''Limestone, crinoidal: encrinite.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51024 S34446(a)]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120399 P552479] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120400 P552480] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120403 P552481] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120408 P552482] Mag: 40 Light: XPL
SL 52 (p. 57) Petershill Limestone, 10 ft from top. Locality and references as for SL 51.
(S34447). Brownish-grey, compact limestone composed of calcareous debris including fragments of small shells and crinoids and numerous tests of foraminifera. A little bituminous matter is present. The matrix is of finely divided calcite in process of recrystallization.
''Limestone, micrograined, microfossiliferous, clastizoic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51025 S34447A]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122356 P553148] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122360 P553149] Mag: 40 Light: XPL
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51025 S34447]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120409 P552483] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120414 P552484] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120417 P552485] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102699 P527928] Thin section
SL 53 (p. 57) Petershill Limestone, lower part. Locality and references as for SL 51
(S34448). A dark grey, coarse-grained limestone composed of crinoid and shell debris, the latter partly incorporated in the recrystallized base of granular calcite.
''Limestone, crinoidal: encrinite.''
Petershill Limestone, lower part. Quarry 1000 yards north 5 degrees east of north-east end of Petershill Reservoir, near Bathgate. West Lothian. A dark grey, coarse-grained limestone composed of crinoid and shell debris, the latter partly incorporated in the recrystallized base of granular calcite. Limestone, crinoidal: encrinite. SL0053. Britrocks S34448(a).
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51026 S34448(a)]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120419 P552486] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120421 P552487] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120424 P552488] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120428 P552489] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102192 P527794] Hand specimen
==== Limestones of the Hosie Group ====
===== Fife =====
SL 233 (p. 57) 'Hosie Limestone' (?). St. Monans shore E. of harbour. 1" Sheet 41; 6" Fife 22 S.E.
(S35236). A dull brownish-grey fine-grained dolomite with many small cavities. The section shows numerous dolomitized fossil relics in­cluding shell and crinoid fragments, small gastropod shells, round bodies and scarce fragments of ostracods and possibly of polyzoa, in a matrix of fine debris which has been converted to dolomite of grain-size about 0.01 mm. Ferriferous dolomite of grain up to 0.2 mm occurs in irregular small patches. Pyrite impregnates some of the crinoids, gastropods and other shell fragments.
''Ferriferous dolomite, micrograined, clastizoic, taxichnic''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=384312 S35236]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121865 P552977] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=121861 P552976] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102981 P528020] Thin section
SL 281 (p. 57) Mid-Kinniny Limestone (prob.) Old Limestone mine, Luscar, Garnock. 1" Sheet 40; 6" Fife 33 S.E. (''Lst. Scot.,'' 1949, p. 103).
(S35804). Dark grey crystalline limestone. In section seen to be a recrystallized limestone of grain-size 0.1–0.5 mm. The original structure is almost entirely destroyed, but in places trabecular structure is preserved by the presence of powdery impurities. The argillaceous and carbonaceous impurities of the limestone are not well segregated in spite of extensive recrystallization, and largely remain inside the new grains. A small aggregate of granular apatite was noted, perhaps from its long slender shape replacing a fish spine. A little pyrite is present. ''Limestone, varigrained, zoophasmic, clastizoic, in part granoblastic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=382416 S35804]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122188 P553085] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122183 P553084] Mag: 40 Light: PPL
===== Midlothian =====
SL 43 (p. 57) Bilston Burn (No. 3) Limestone, main quarried band. Quarry, Esperston Limeworks, 660 yd N.E. of Esperston. 1" Sheet 32; 6" Midlothian 20 N.E. (''Lst. Scot.,'' 1949, p. 146).
(S34532). Dark grey, fine-grained limestone containing fragments of small shells and polyzoa (outlined by pyrite) and foraminifera. The matrix is of granular calcite, 0.01 to 0.03 mm grain, and the more complete shells are filled with coarser calcite.
''Limestone, micrograined, microfossiliferous, clastizoichnic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51102 S34532]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120882 P552650] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120878 P552649] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102224 P527802] Hand specimen
SL 44 (p. 58) Bilston Burn (No. 3) Limestone, 3 ft dolomitic band at top. Locality and references as for SL 43.
(S34533). Dark grey, fine-grained, granular dolomite, of 0.05 mm grain-size, containing remains of small shells and crinoids. Treatment with Lemberg's solution and by the silver nitrate-potassium chromate reaction show no calcite. There is much opaque carbonaceous matter, and perhaps pyrite also, apparently concentrated at the location of former microfossils. The dolomite is ankeritic with ɷ = 1.690.
''Ferriferous dolomite, fine-grained, zoophasmic, uneven mosaic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51103 S34533(a)]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120885 P552651] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120889 P552652] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120890 P552653] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120895 P552654] Mag: 40 Light: XPL
SL 45 (p. 58) Bilston Burn (No. 3) Limestone (?), deep seated, weathered limestone. Esperston Limeworks, as SL 43.
(S34534). Pale buff, very fine-grained limestone with brown bituminous films. Composed of finely granular calcite (0.01 mm grain) enclosing numerous shell fragments which are often flat or flattened along the bedding. Clay is sometimes recognizable in small aggregates as kaolin. Quartz is rarely distinguishable as small grains, 0.01 mm, but many feebly birefringent aggregates may be more finely divided quartz. Shreds of bituminous and limonitic matter are common and limonite replaces scattered rhombs of siderite.
''Limestone, argillaceous, micrograined, fossiliferous, clastizoic, bedded.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=51104 S34534]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120899 P552656] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120898 P552655] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102224 P527802] Hand specimen
===== Peebles =====
SL 22 (p. 58) Bilston Burn (No. 3) Limestone. In stream, 800 yd E. of Deepsykehead. 1" Sheet 24; 6" Peebles. 5 N.E. (''Lst. Scot.,'' 1949, p. 151).
(S34543). A dull dark grey, brown-mottled dolomite. Composed of granular and semi-recrystallized dolomite, of grain 0.01–0.1 mm, in which thin-walled shell fragments are present. Angular quartz grains are abundant; muscovite, biotite, iron ore, brown phosphatic fossil fragments, shreds of carbonaceous matter and grains of pyrite are accessory. A few large crinoid fragments are still calcite and enclose small rhombs of dolomite.
''Dolomite, calcareous, arenaceous, fine-grained, clastizoic.''
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=376718 S34543]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120955 P552674] Mag: 40 Light: XPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=120951 P552673] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=102176 P527790] Hand specimen
==== Lower Limestone Group, unclassified ====
===== Dumfries =====
SL 264 (p. 58) Limestone. Quarry, Blackwoodridge Limeworks, 50 yd S. of Blackwoodridge Farm, 1 mile S. of Waterbeck. 1" Sheet 10; 6" Dumfries. 52 S.W. (''Lst. Scot.,'' 1949, p. 90).
(S35468). A reddish, compact limestone, effervescing moderately freely with cold dilute HCI, with duller red bands which effervesce freely. In thin section the more crystalline part is seen to be composed of anhedral grains of calcite about 0.05–0.1 mm across, among which are preserved relics of fossil structures. The duller red portion is composed of fossil debris, including foraminifera, shell and crinoid fragments, ostracod shells, productid spines, scarce algal nodules and coral. The matrix is recrystallized to fine-grained granular calcite, and red iron ore is abundantly disseminated through it. There may be a little dolomite in the matrix, as some grains give rhomboid sections.
''Limestone, micrograined, microfossiliferous, clastizoic, in part zoophasmic.''
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=84030 P531428] Thin section
SL 265 (p. 58) Limestone. Quarry 400 yd S. of Blackwoodridge Farm. References as for SL 264.
(S35469). A compact, whitish-buff limestone, composed of the debris of shells and crinoids, many species of foraminifera, ostracod and polyzoan fragments, occasional productid spines and rhombs of oxidized ankerite cemented by scanty finely divided calcite which in places is entirely of algal origin.
''Limestone, fine-grained, microfossiliferous, clastizoic.''
===== East Lothian =====
Britrocks: [https://webapps.bgs.ac.uk/data/britrocks/britrocks.cfc?method=viewSamples&sampleId=343069 S35469]
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122096 P553054] Mag: 40 Light: PPL
Geoscenic: [http://geoscenic.bgs.ac.uk/asset-bank/action/viewAsset?id=122098 P553055] Mag: 40 Light: XPL
SL 60 (p. 58) Limestone. Quarry, Jerusalem Limeworks, 2 miles S. of Gladsmuir. 1" Sheet 33; 6" East Lothian 9 S.E. (''Lst. Scot.,'' 1949, p. 94).
(S34549). A dull brownish-grey argillaceous limestone composed of finely divided calcite debris and small organic fragments with probably some argillaceous admixture; occasional tiny pockets of kaolin and grains of quartz are seen. Specks of carbonaceous matter and grains of pyrite are sparsely distributed.
''Limestone, argillaceous, pelitomorphic, microclastizoic.''
Limestone. Quarry, Jerusalem Limeworks, 2 miles south of Gladsmuir East Lothian. A dull brownish-grey argillaceous limestone composed of finely divided calcite debris and small organic fragments with probably some argillaceous admixture; occasional tiny pockets of kaolin and grains of quartz are seen. Specks of carbonaceous matter and grains of pyrite are sparsely distributed. Limestone, argillaceous, pelitomorphic, microclastizoic. SL0060. Britrocks S34549.