Page 63 |
P805699 |
Tortworth inlier. Bristol Excursion, April 17th 1919. Damery Quarry. This is a compact andesitic trap but containing a very small quantity of ferromagnesian minerals. In places it is of a well marked amygdaloidal character the cavities being filled with calcite and chlorite.
|
Page 63 |
P805700 |
Tortworth inlier. Bristol Excursion, April 17th 1919. Damery Quarry. This is a compact andesitic trap but containing a very small quantity of ferromagnesian minerals. In places it is of a well marked amygdaloidal character the cavities being filled with calcite and chlorite.
|
Page 63 |
P805701 |
Burrington Combe. Bristol Excursion, April 17th 1919. A stream descending a swallow hole. This stream rises on Blackdown on the Old Red Sandstone and flows down in a northerly direction over the Carboniferous K beds which being of an argillaceous character are impervious but directly they reach the Z beds which consist of massive limestone with many joints the water immediately sinks in and finds an undergound channel.
|
Page 63 |
P805702 |
Burrington Combe. Bristol Excursion, April 17th 1919. A stream descending a swallow hole. This stream rises on Blackdown on the Old Red Sandstone and flows down in a northerly direction over the Carboniferous K beds which being of an argillaceous character are impervious but directly they reach the Z beds which consist of massive limestone with many joints the water immediately sinks in and finds an undergound channel.
|
Page 65 |
P805703 |
Burrington Combe. Bristol Excursion, April 19th 1919. The Rock of Ages. It was whilst taking shelter from a thunder storm in the 'cleft' of this rock that the Rev. Augustus M. Toplady of Blagdon composed the well known hymn 'Rock of Ages cleft for me'. He died in 1770 aged 38.
|
Page 65 |
P805704 |
Burrington Combe. Bristol Excursion, April 19th 1919. Quarry in Carboniferous limestone. This consists of the massive oolitic and foraminiferal limestone of the Upper Syringothyris zone styled (C2). Added note: North, South.
|
Page 65 |
P805705 |
Burrington Combe looking North. Bristol Excursion, April 19th 1919. This picturesque combe is a deep ravine cut into the northern side of the Blackdown plateau and shows a fine section of the Lower Carboniferous Limestone in the quarries on the left hand side of the road from Burrington. Owing to the high dip which averages 60 degrees, the whole of the beds from D1 to the Old Red Sandstone with a thickness of 2600 feet can be studied within two thirds of a mile. These are correlated to the Gully Oolite of the Avon section.
|
Page 65 |
P805706 |
Burrington Combe looking North. Bristol Excursion, April 19th 1919. This picturesque combe is a deep ravine cut into the northern side of the Blackdown plateau and shows a fine section of the Lower Carboniferous Limestone in the quarries on the left hand side of the road from Burrington. Owing to the high dip which averages 60 degrees, the whole of the beds from D1 to the Old Red Sandstone with a thickness of 2600 feet can be studied within two thirds of a mile. These are correlated to the Gully Oolite of the Avon section.
|
Page 67 |
P805707 |
Cheddar. Bristol Excursion, April 19th 1919. As the Cheddar gorge mainly follows the strike we find that the greater part of the strata seen consists of the Seminula beds but the various horizons from C2 to D1 are represented.
|
Page 67 |
P805708 |
Cheddar. Bristol Excursion, April 19th 1919. As the gorge runs south-westwards across the strata which are dipping due south we find on the right hand side a series of step like dip slopes and on the left mural faces and jointed bastions progressively increasing in grandeur as the valley deepens toward its outlet on the plain.
|
Page 67 |
P805709 |
Cheddar. Bristol Excursion, April 19th 1919. As the gorge runs south-westwards across the strata which are dipping due south we find on the right hand side a series of step like dip slopes and on the left mural faces and jointed bastions progressively increasing in grandeur as the valley deepens toward its outlet on the plain.
|
Page 69 |
P805710 |
Cheddar. Bristol Excursion, April 19th 1919. The valley bottom is dry and without any stream but as we approach the village of Cheddar a stream is seen to issue from an arch in the limestone. Its course underground has not been followed but is probably fed some several swallow holes in the Mendip hills.
|
Page 69 |
P805711 |
Cheddar. Bristol Excursion, April 19th 1919. The valley bottom is dry and without any stream but as we approach the village of Cheddar a stream is seen to issue from an arch in the limestone. Its course underground has not been followed but is probably fed some several swallow holes in the Mendip hills.
|
Page 69 |
P805712 |
Cheddar. Bristol Excursion, April 19th 1919. Quarry in the Cheddar Gorge where the Great Rock fall of Feb. 6 1906 took place. This is in the upper part of S.1. Many fine specimens of the coral Lithostrotion martini are found here.
|
Page 69 |
P805713 |
Cheddar. Bristol Excursion, April 19th 1919. From below these bastions assume the appearance of isolates pinnacles but they are for the most part spurs from the denuded arch of the hills.
|
Page 71 |
P805714 |
Radstock District. Bowldish Quarry. 3/4 of a mile north of Midsomer Norton. Bristol Excursion, April 21st 1919. Sections in Lower Lias in the Sauzeanum zone. These beds are very fossiliferous and from this quarry the finest specimens of Spiriferina Walcotti have been obtained.
|
Page 71 |
P805715 |
Radstock District. Bowldish Quarry. 3/4 of a mile north of Midsomer Norton. Bristol Excursion, April 21st 1919. Sections in Lower Lias in the Sauzeanum zone. These beds are very fossiliferous and from this quarry the finest specimens of Spiriferina Walcotti have been obtained.
|
Page 71 |
P805716 |
Radstock District. Clandown Quarry. Bristol Excursion, April 21st 1919. This quarry is in the Armatus and Jamesoni zones and consists of White Lias limestones overlaid by planorbis beds. The Spirifer bank and the conglomeratic and phosphatic band at the armatus raricostatus level are well marked and contain crinoidal remains and various marine fossils. The upper beds are on the Jamesoni horizon.
|
Page 71 |
P805717 |
Radstock District. Clandown Quarry. Bristol Excursion, April 21st 1919. This quarry is in the Armatus and Jamesoni zones and consists of White Lias limestones overlaid by planorbis beds. The Spirifer bank and the conglomeratic and phosphatic band at the armatus raricostatus level are well marked and contain crinoidal remains and various marine fossils. The upper beds are on the Jamesoni horizon.
|
Page 73 |
P805718 |
Grove Quarry, Radstock. 3/4 of a mile south of the town. Bristol Excursion, April 21st 1919. These quarries show very well the typical limestone nature of the Lower Lias of the Sinemurian and Hettangian divisions.
|
Page 73 |
P805719 |
Grove Quarry, Radstock. 3/4 of a mile south of the town. Bristol Excursion, April 21st 1919. These quarries show very well the typical limestone nature of the Lower Lias of the Sinemurian and Hettangian divisions.
|
Page 73 |
P805720 |
Bristol Excursion, April 21st 1919. Added note: White Lias.
|
Page 73 |
P805721 |
Bristol Excursion, April 21st 1919. Added note: White Lias.
|
Page 75 |
P805722 |
Portishead. Battery Point. Bristol Excursion, April 22nd 1919. Anticlines in the upper Cleistopora Beds of the Carboniferous Limestone.
|
Page 75 |
P805723 |
Portishead. Battery Point. Bristol Excursion, April 22nd 1919. Anticlines in the upper Cleistopora beds of the Carboniferous Limestone.
|
Page 75 |
P805724 |
Portishead. Bristol Excursion, April 22nd 1919. Syncline and broken anticline in the upper Cleistopora beds of the Carb [Carboniferous] Limestone, Battery Point.
|
Page 75 |
P805725 |
Portishead. Bristol Excursion, April 22nd 1919. The Dolomitic Conglomerate of the base of the Trias resting unconformably on the Old Red Sandstone.
|
Page 77 |
P805726 |
Portishead. Bristol Excursion, April 22nd 1919. Calcareous development in Old Red Sandstone.
|
Page 77 |
P805727 |
Portishead. Bristol Excursion, April 22nd 1919. Old Red Sandstone and shale.
|
Page 77 |
P805728 |
Portishead. Bristol Excursion, April 22nd 1919. Crushed Carboniferous Limestone on line of fault below Battery Point.
|
Page 77 |
P805729 |
Portishead. Bristol Excursion, April 22nd 1919. Conglomerate and calcareous development in Old Red Sandstone.
|
Page 79 |
P805730 |
Portishead. Bristol Excursion, April 22nd 1919. Current or false bedding in Old Red Sandstone.
|
Page 79 |
P805731 |
Portishead. Bristol Excursion, April 22nd 1919. Current or false bedding in Old Red Sandstone. Added note: Also calcareous development.
|
Page 81 |
P805732 |
Aust Cliff. Bristol Excursion, April 22nd 1919. This cliff section exposed on the bank of the Severn at Aust shows in every detail the gradual passage from beds of Triassic age to those of the Jurassic system. The colour of these marls is due to the particular oxide of iron they contain. The Red marl having ferric oxide Fe2O3 while the green and blue have ferrous oxide FeO.
|
Page 81 |
P805733 |
Aust Cliff. Bristol Excursion, April 22nd 1919. This cliff section exposed on the bank of the Severn at Aust shows in every detail the gradual passage from beds of Triassic age to those of the Jurassic system. The colour of these marls is due to the particular oxide of iron they contain. The Red marl having ferric oxide Fe2O3 while the green and blue have ferrous oxide FeO. Added note:Tea Green Marls, Red marls.
|
Page 81 |
P805734 |
Aust Cliff. Bristol Excursion, April 22nd 1919. The gypsum of the Red Keuper Marls occurs chiefly in the form of discontinuous vertical deposits like veins with which are connected smaller veins or strings ramifying through the surrounding rock. This mineral evidently fills up former cracks in the rock.
|
Page 81 |
P805735 |
Aust Cliff. Bristol Excursion, April 22nd 1919. The gypsum of the Red Keuper Marls occurs chiefly in the form of discontinuous vertical deposits like veins with which are connected smaller veins or strings ramifying through the surrounding rock. This mineral evidently fills up former cracks in the rock.
|
Page 83 |
P805736 |
Aust Cliff. Bristol Excursion, April 22nd 1919. Step fault - formed by two juxtaposed faults 'throwing' in the same direction.
|
Page 83 |
P805737 |
Aust Cliff. Bristol Excursion, April 22nd 1919. The gypsum which does not occur in regular beds is found in lumps, strings and veins through being deposited in cracks by percolating water.
|
Page 83 |
P805738 |
Aust Cliff. Bristol Excursion, April 22nd 1919. Above the Tea Green Marls occurs the well known Bone bed at the base of the Rhaetic or Penarth beds. At the south end of the section it consists of a dark hard compact limestone while in the centre it is a thin layer of siliceous grit loaded with fish teeth, scales, bones and dorsal spines together with vertebrae and coprolites of saurians. Above the bone bed are the black shales about a foot thick with Avicula contorta, Cardium rhaeticum and Pecten valoniensis. Added note: Tea Green Marls, Keuper Red Marls, Band with gypsum, Red sandstone resting unconformably on Carb. [Carboniferous] limestone.
|
Page 85 |
P805739 |
Aust Cliff. Bristol Excursion, April 22nd 1919. The continuity of these beds are [is] broken by five faults in which the downthrow side is to the south. Down the lines of faulting are thin veins of gypsum and celestine associated with calcite, this together with the hardening due to the pressure of faulting causes a little promontory or buttress which projects for several feet from the cliff face.
|
Page 85 |
P805740 |
Aust Cliff. Bristol Excursion, April 22nd 1919. The continuity of these beds are [is] broken by five faults in which the downthrow side is to the south. Down the lines of faulting are thin veins of gypsum and celestine associated with calcite, this together with the hardening due to the pressure of faulting causes a little promontory or buttress which projects for several feet from the cliff face.
|
Page 85 |
P805741 |
Aust Cliff. Bristol Excursion, April 22nd 1919. Immediately above the Avicula contorta zone is a thin argillaceous limestone known as the Insect bed. This forms the base of the White Lias beds while the top of the cliff is formed by the Lima Series of the Lower Lias. Added note: White Lias, Insect Bed, Planorbis Bed, Avicula contorta zone, Bone Bed,Tea Green Marls, Keuper Red Marls.
|
Page 85 |
P805742 |
Aust Cliff. Bristol Excursion, April 22nd 1919. At each fault a small stream of water trickles over the face of the cliff. This is caused by the water percolating through the porous White Lias being dammed back against the marly clay below.
|
Page 87 |
P805743 |
Spring Cove - Weston. Bristol Excursion, [no date, April 1919]. Remains of raised beach resting on Carboniferous Limestone (25 ft above high water). Added note: Talus, Raised beach, Carb. [Carboniferous] Limestone.
|
Page 87 |
P805744 |
Spring Cove - Weston. Bristol Excursion, [no date, April 1919]. The raised beach consists of fragments of limestone with shells now living in the sea below and hardened by a calcareous cement. Added note: Talus, Raised beach, Carb. [Carboniferous] Limestone.
|
Page 87 |
P805745 |
Spring Cove - Weston. Bristol Excursion, [no date, April 1919]. Bed of basaltic lava interbedded in the syringothyris beds (top of C1) of the Carboniferous Limestone. Added note: Basaltic lava, Laminosa Dolomite (C1), Calc Tuff.
|
Page 87 |
P805746 |
Spring Cove - Weston. Bristol Excursion, [no date, April 1919]. Section in he Laminosa Dolomite (C1) of the Carboniferous Limestone. In the foreground is a block of the raised beach fallen from 25 ft above. Added note: Laminosa Dolomite (C1), Block of raised beach, Calc [Calcareous] Tuff.
|
Page 89 |
P805747 |
Woodspring. Bristol Excursion, [no date, April 1919]. 2nd exposure of igneous series. Added note: Calcareous tuff, Laminosa Dolomite C1.
|
Page 89 |
P805748 |
Woodspring. Bristol Excursion, [no date, April 1919]. Junction of interbedded basaltic lava and Carboniferous Limestone - Spring Cove. Added note: Basaltic lava, Carb. [Carboniferous] Limestone.
|
Page 89 |
P805749 |
Woodspring. Bristol Excursion, [no date, April 1919]. Highly inclined calcareous tuff. Woodspring, 2nd exposure.
|
Page 89 |
P805750 |
Woodspring. Bristol Excursion, [no date, April 1919]. Hollow denuded by the action of the sea at the junction of the calcareous tuff and the Carboniferous Limestone. Added note: Carboniferous Limestone, Calc [Calcareous] tuff.
|
Page 91 |
P805751 |
Woodspring. Bristol Excursion, [no date, April 1919]. Jointing in Laminosa Dolomite (C1). This also [shows] the undercutting caused by the waves dashing the stones against the rock.
|
Page 91 |
P805752 |
Woodspring. Bristol Excursion, [no date, April 1919]. The Western exposure showing junction of the calcareous tuff and the Laminosa Dolomite (C1). Added note: Laminosa Dolomite (C1), Calcareous Tuff.
|
Page 91 |
P805753 |
Woodspring. Bristol Excursion, [no date, April 1919]. Calcareous tuff veined by calcite, Western exposure.
|
Page 93 |
P805754 |
Woodspring. Bristol Excursion, [no date, April 1919]. Outcrop of igneous rocks at the Western exposure - showing the way they form weak points which cause rapid coast erosion. Added note: Calcareous tuff, Pillowy basaltic lava.
|
Page 93 |
P805755 |
Woodspring. Bristol Excursion, [no date, April 1919]. The 'Monkey face' Rock, a mass of pillowy basaltic lava.
|
Page 93 |
P805756 |
Woodspring. Bristol Excursion, [no date, April 1919]. North shore of Woodspring Promontory showing Carb. Lstn. [Carboniferous Limestone] Z2 dipping S.
|
Page 93 |
P805757 |
Woodspring. Bristol Excursion, [no date, April 1919]. North shore of Woodspring Promontory showing Carb. Lstn. [Carboniferous Limestone] Z2 dipping S.
|
Page 95] |
P805758 |
Quarry No. 3 (Rock Leigh) showing the dip slope with Caninia Oolite. Bristol Excursion, [no date, April 1919].
|
Page 95 |
P805759 |
Quarry No. 2 (Z2 Beds). Bristol Excursion, [no date, April 1919]. [Group photo].
|
Page 95 |
P805760 |
The Avon Gorge looking N towards the sea. Bristol Excursion, [no date, April 1919].
|
Page 95 |
P805761 |
The Avon Gorge looking S towards Bristol. Bristol Excursion, [no date, April 1919].
|
Page 97 |
P805762 |
Avon section, left bank. Bristol Excursion, [no date, April 1919].
|
Page 97 |
P805763 |
Avon section, left bank. Bristol Excursion, [no date, April 1919]. Caninia Dolomite on Gully Oolite (Carb [Carboniferous] Limestone. Quarry No. 3. Added note: Caninia Dolomite C2, Gully or Caninia Oolite C1.
|
Page 97 |
P805764 |
Avon section, left bank. Bristol Excursion, [no date, April 1919]. No. 2 Quarry. Z2 beds.
|
Page 97 |
P805765 |
Avon section, left bank. Bristol Excursion, [no date, April 1919]. Quarry No. 2 (Z2 beds).
|
Page 99 |
P805766 |
Avon section, right bank. Bristol Excursion, [no date, April 1919]. The Northern end of the section. In the centre are seen the Modiola shales (Km) capped by the Bryozoa bed. Added note: Old Red Sandstone, Bryozoa bed.
|
Page 99 |
P805767 |
Avon section, right bank. Bristol Excursion, [no date, April 1919]. The Black Rock Quarry. Added note: K2 beds, Z1, Z2 beds. Subzone of Zaphrentis konincki, Z2, Z1 Subzone of Sprifer clathratus.
|
Page 99 |
P805768 |
Avon section, right bank. Bristol Excursion, [no date, April 1919]. The Black Rock Quarry showing the north slope and part of the Gully. Added notes: Z1 Subzone of Spirifer clathratus, Z2 Subzone of Zaphrentis konincki, Fish Beds, Horizon Y., C1, the Gully, C1 Laminosa Dolomites.
|
Page 101 |
P805769 |
Avon section, right bank. Bristol Excursion, [no date, April 1919]. The Oolite Quarry. Added note: Caninia Dolomite C2, Gully or Caninia Oolite C1, Laminosa Dolomite C1.
|
Page 101 |
P805770 |
Avon section, right bank. Bristol Excursion, [no date, April 1919]. The Gully to Great Quarry. Added note: C1, Caninia dolomite C2, S.1.
|
Page 101 |
P805771 |
Avon section, right bank. Bristol Excursion, [no date, April 1919]. The Great Quarry. Added note: Subzone of Caninia bristolensis S.1., S.2. (Subzone of Productus cora), D1 Subzone of Dibunophyllum ?.
|
Page 103 |
P805772 |
Avon section, right bank. Bristol Excursion, [no date, April 1919]. The lower railway cutting. Modiola shales (Km) with Bryozoa Beds above (K.1.). Added note: Bryozoa bed K1.
|
Page 103 |
P805773 |
Avon section, right bank. Bristol Excursion, [no date, April 1919]. The Caninia Dolomite (C2) subzone of Cyathophyllum ? resting conformably on the Caninia Oolite C1 Carboniferous limestone. Gully N. of Great Quarry.
|
Page 103 |
P805774 |
Avon section, right bank. Bristol Excursion, [no date, April 1919]. Railway cutting North of Cooks Folly. Modiola Shales overlaid by the Bryozoa Bed.
|
Page 105 |
P805775 |
Avon section, right bank. Bristol Excursion, [no date, April 1919]. S2 beds at South end of quarry. Added note: Seminula Oolite, Smooth joint face.
|
Page 105 |
P805776 |
Avon section, right bank. Bristol Excursion, [no date, April 1919]. Smooth joint face in S2 beds. South end of Rifle range quarry.
|
Page 105 |
P805777 |
Avon section, right bank. Bristol Excursion, [no date, April 1919]. The Great Quarry or Rifle-Range Quarry. North end S.1. beds. Added note: Line of small thrust.
|
Page 105 |
P805778 |
Avon section, right bank. Bristol Excursion, [no date, April 1919]. The Great Quarry or Rifle-Range Quarry. S.1. beds at North end of quarry. The bare face in the foreground is a shale band covered with a Terebratuliform brachiopod named Seminula ficoides.
|
Page 107 |
P805779 |
Avon section, right bank. Bristol Excursion, [no date, April 1919]. The Great Fault. The vertical displacement is about 1100. The massive limestone on the right belongs to the Upper Seminula zone. The crumpled beds are the Red Grits and shales of the top of D2.
|
Page 109 |
P805780 |
Avon section, right bank. Bristol Excursion, [no date, April 1919]. Southern end of Rifle Range Quarry. Added note: S.2., D1.
|
Page 109 |
P805781 |
Avon section, right bank. Bristol Excursion, [no date, April 1919]. D1 beds near Point Villa. Added note: Dolomitic conglomerate of Bridge Valley Road.
|
Page 109 |
P805782 |
Avon section, right bank. Bristol Excursion, [no date, April 1919]. The Great Fault. Added note: Contorted highest Dibunophyllum beds, Upper Seminula beds.
|
Page 109 |
P805783 |
Avon section, right bank. Bristol Excursion, [no date, April 1919]. Upper Seminula beds S2.
|
Page 111 |
P805784 |
Avon section, right bank. Bristol Excursion, [no date, April 1919]. S.1. beds. N. end of Rifle range quarry.
|
Page 111 |
P805785 |
Avon section, right bank. Bristol Excursion, [no date, April 1919]. Z1 beds. N. end of Black Rock Quarry.
|
Page 111 |
P805786 |
Avon section, right bank. Bristol Excursion, [no date, April 1919]. Upper Carboniferous Limestone beds. Added note: C1, C2, S, D.
|
Page 111 |
P805787 |
Avon section, right bank. Bristol Excursion, [no date, April 1919]. Black Rock Quarry showing the very level surface of Durdham Downs at Sea Walls. Added note: Sea Walls, Gully.
|