User contributions for Dbk

11 October 2013

• 12:2112:21, 11 October 2013 diff hist +530‎ N Chalk Group Lithostratigraphy: Northern England - Maidlands Lower Marls ‎ Created page with "A group of three grey, chalky marls, c. 20-50 mm thick, in a c. 1.4 m interval of chalk (Whitham, 1993). '''Macrofossil Biozonation''': ''U. socialis'' Zone '''Correlation''..." current
• 12:2012:20, 11 October 2013 diff hist +662‎ N Chalk Group Lithostratigraphy: Northern England - Maidland Tilestone ‎ Created page with "Recognised by Mitchell (1994), it comprises a c. 1.8 m thick unit of thin-bedded (c. 0.1 m) chalk, conspicuous in cliff sections, and containing an acme of the crinoid ''Uinta..." current
• 12:0012:00, 11 October 2013 diff hist +798‎ N Chalk Group Lithostratigraphy: Northern England - Hartendale Marl ‎ Created page with "This comprises a c. 20-30 mm thick grey, silty marl, locally expanding to a c. 100 mm thick chalk and marl complex. '''Macrofossil Biozonation''': ''U. socialis'' Zone '''Co..." current
• 11:5911:59, 11 October 2013 diff hist +1,033‎ N Chalk Group Lithostratigraphy: Northern England - Beacon Hill Farm Marls ‎ Created page with "Whitham (1993) recognised three thick (40-120 mm) marls in this group, comprising dark grey, brown and green-brown silty and unctuous marls, the lowest with chalk lens inclusi..." current
• 11:5811:58, 11 October 2013 diff hist +909‎ N Chalk Group Lithostratigraphy: Northern England - West Nook Marls ‎ Created page with "Whitham (1993) included in the West Nook Marls three grey silty marls, each 20-30 mm thick, and c. 0.5 m apart, but subsequently Mitchell (1994) recognised a fourth marl in th..." current
• 11:5711:57, 11 October 2013 diff hist +1,106‎ N Chalk Group Lithostratigraphy: Northern England - East Nook Marls ‎ Created page with "Whitham (1993) described a single East Nook Marl (=East Nook Marl 1), comprising a grey, silty/chalky marl, c. 20-30 mm thick, marking the base of the Danes Dyke Member. Subse..." current
• 11:5611:56, 11 October 2013 diff hist +1,134‎ N Chalk Group Lithostratigraphy: Northern England - Danes Dyke Member ‎ Created page with "The Danes Dyke Member (stratotype: South Landing to Danes Dyke [TA 231 692 to TA ### ###]), c. 67 m thick, is softer than the underlying South Landing Member, and comprises al..." current
• 11:5511:55, 11 October 2013 diff hist +647‎ N Chalk Group Lithostratigraphy: Northern England - High Stacks Marl ‎ Created page with "A c. 20 mm thick grey, silty marl, c. 3.5 m above the top of the High Stacks Flint, and typically seen as a deep groove in coastal sections (Whitham, 1993). '''Macrofossil Bi..." current
• 11:5411:54, 11 October 2013 diff hist +1,228‎ N Chalk Group Lithostratigraphy: Northern England - South Landing Member ‎ Created page with "The South Landing Member (stratotype: High Stacks to South Landing Ravine [TA 231 692 to TA 256 699], c. 21 m thick, comprises hard, white, massively bedded chalk with c. 19 t..." current
• 11:4911:49, 11 October 2013 diff hist +1,831‎ N Chalk Group Lithostratigraphy: Northern England - Flamborough Chalk Formation ‎ Created page with "The Flamborough Chalk Formation (stratotype: Flamborough Head, between High Stacks [TA 258 704] and Sewerby [TA 202 687]), c. +215-?+300 m thick, is the youngest exposed chalk..." current
• 11:4711:47, 11 October 2013 diff hist +776‎ N Chalk Group Lithostratigraphy: Northern England - High Stacks Flint ‎ Created page with "This is the highest true flint in the Chalk Group of northern England, and marks the top of the Burnham Chalk Formation and the top of the Lower ''Hagenowia rostrata'' Zone of..." current
• 11:4611:46, 11 October 2013 diff hist +1,151‎ N Chalk Group Lithostratigraphy: Northern England - Middleton Marls ‎ Created page with "Wood & Smith (1978) identified a c. 50 mm thick brown marl, underlain by spongiferous chalk and the inoceramid bivalve ''Inoceramus digitatus'', as the Middleton Marl. This ma..." current

10 October 2013

• 15:0215:02, 10 October 2013 diff hist +965‎ N Chalk Group Lithostratigraphy: Northern England - De La Pole Flint ‎ Created page with "This is a flat-topped, continuous, tabular flint, c. 0.14 m thick, and markedly carious in the upper half (Gaunt ''et al''., 1992). The relative abundance of ''Volviceramus'' ..." current
• 15:0115:01, 10 October 2013 diff hist +959‎ N Chalk Group Lithostratigraphy: Northern England - Eppleworth Flint ‎ Created page with "This is a large (c. 0.3 m thick), very irregular, semitabular flint, associated with the inoceramid bivalve ''Volviceramus'', and perhaps equating with the Seven Sisters Flint..." current
• 15:0015:00, 10 October 2013 diff hist +718‎ N Chalk Group Lithostratigraphy: Northern England - Rowley Marls ‎ Created page with "These four marls, each c. 20 mm thick, occupy a c. 3 m interval of massive, inoceramid shell rich chalk (Gaunt et al., 1992). In their stratigraphical position, in the lower '..." current
• 14:5914:59, 10 October 2013 diff hist +1,282‎ N Chalk Group Lithostratigraphy: Northern England - Little Weighton Marls ‎ Created page with "These comprise three marls in a c. 3 m thick chalk interval, and are the first thick marl bands that occur above the Kiplingcotes Marls (Gaunt et al., 1992). The lowest two ma..." current
• 14:5814:58, 10 October 2013 diff hist +680‎ N Chalk Group Lithostratigraphy: Northern England - Riplingham Tabular Flints ‎ Created page with "These are three tabular flints in a c. 1.75 m interval, the lowest of which is c. 0.13 m thick, and carious, semitabular or discotinuous; the middle (c. 0.1 m thick) and upper..." current
• 14:4814:48, 10 October 2013 diff hist +626‎ N Chalk Group Lithostratigraphy: Northern England - Willerby Flints ‎ Created page with "These are three thick (0.1-0.25 m), non-carious, tabular or lenticular flints occupying a c. 4 m thick chalk interval, and represent the highest of a succession of dark grey f..." current
• 14:4714:47, 10 October 2013 diff hist +588‎ N Chalk Group Lithostratigraphy: Northern England - Kirk Ella Marl ‎ Created page with "This is a thin (c. 10 mm), pale brown marl, underlain by cream and brown, irregular, partly silicified flints, up to 0.1 m thick; a readily recognised marker combination in se..." current
• 14:4514:45, 10 October 2013 diff hist +1,096‎ N Chalk Group Lithostratigraphy: Northern England - Barrow Flints ‎ Created page with "These comprise two giant flints, each up to c. 0.3 m thick, associated with nodular chalk and separated by laminate chalk (Gaunt ''et al''., 1992). They are variably developed..." current
• 14:4414:44, 10 October 2013 diff hist +798‎ N Chalk Group Lithostratigraphy: Northern England - Easthorpe Tabular Flints ‎ Created page with "These consist of three prominent tabular flints in a c. 1 m chalk interval, underlain by flaser bedded chalks with the trace fossil ''Zoophycos'' and the echinoids ''Micraster..." current
• 14:4214:42, 10 October 2013 diff hist +828‎ N Chalk Group Lithostratigraphy: Northern England - Kiplingcotes Flints ‎ Created page with "These are three conspicuous semitabular flints, c. 0.15 m thick, the lowest of which is lenticular, the middle one distinctly carious, and the highest characterised by downwar..." current
• 14:4014:40, 10 October 2013 diff hist −38‎ Chalk Group Lithostratigraphy: Northern England - Kiplingcotes Marls ‎No edit summary current
• 14:4014:40, 10 October 2013 diff hist +1,432‎ N Chalk Group Lithostratigraphy: Northern England - Kiplingcotes Marls ‎ Created page with " Three marls, each about 30 mm thick, occupying a c. 2 m interval (Wood & Smith, 1978), and possibly equating with the Navigation Marls of the Lewes Nodular Chalk Member in s..."
• 14:3914:39, 10 October 2013 diff hist +796‎ N Chalk Group Lithostratigraphy: Northern England - Enthorpe Oyster Beds ‎ Created page with "Comprises 0.1-0.25 m of relatively soft chalk with pycnodonteine oysters and brachiopods (Wood & Smith, 1978), but typically much less well developed than the underlying Ulceb..." current
• 14:3814:38, 10 October 2013 diff hist +612‎ N Chalk Group Lithostratigraphy: Northern England - Enthorpe Marls ‎ Created page with "A group of up to four marls (although locally the highest might be absent), of which the lowest is the best developed (up to 50 mm), in an interval of c. 2.5 m of chalk (Wood ..." current
• 14:3714:37, 10 October 2013 diff hist +550‎ N Chalk Group Lithostratigraphy: Northern England - Ulceby Oyster Bed ‎ Created page with "Comprises up to 0.2 m of distinctly soft, marly chalk with abundant pycnodonteine oysters, and brachiopods (Wood & Smith, 1978). '''Macrofossil Biozonation''': ''S. plana'' Z..." current
• 14:3614:36, 10 October 2013 diff hist +1,359‎ N Chalk Group Lithostratigraphy: Northern England - Ulceby Marl ‎ Created page with "This marl, up to 70 mm thick, is distinguished from all other marls by being hard, silty and grey-brown in colour and characterised by abundant small crinoid columnals (Wood &..." current
• 14:3514:35, 10 October 2013 diff hist +740‎ N Chalk Group Lithostratigraphy: Northern England - Wootton Marls ‎ Created page with "These are two thin (c. 12 mm) marls bounding a c. 0.45 m thick interval of massive chalk, locally with a tabular flint (Wood & Smith, 1978). The marls mark the change from sol..." current
• 14:3414:34, 10 October 2013 diff hist +523‎ N Chalk Group Lithostratigraphy: Northern England - Thornton Curtis Marl ‎ Created page with "A c. 20 mm thick brown marl, named after the Thornton Curtis Pit [TA 0765 1780] (Wood & Smith, 1978). '''Macrofossil Biozonation''': ''S. plana'' Zone '''Correlation''': see..." current
• 14:3214:32, 10 October 2013 diff hist +1,170‎ N Chalk Group Lithostratigraphy: Northern England - Ludborough Flint ‎ Created page with "This is a conspicuous, laterally very persistent tabular, locally semitabular, flint, up to 0.25 m thick, and typically pale grey or white in colour (Wood & Smith, 1978). In c..." current
• 14:3114:31, 10 October 2013 diff hist +1,619‎ N Chalk Group Lithostratigraphy: Northern England - North Ormsby Marl ‎ Created page with "This is a laminated marl, up to 110mm thick, with a sharp base and gradational top (Wood & Smith, 1978), equating with the Grimes Graves Marl of the East Anglia Chalk Group su..." current
• 14:3014:30, 10 October 2013 diff hist +1,131‎ N Chalk Group Lithostratigraphy: Northern England - Triple Tabular Flints ‎ Created page with "A group of three tabular, or locally semitabular flints, occupying a c. 1.5 m interval of chalk, the lowest of which is the thickest, and the highest flint sometimes being rep..." current
• 14:2914:29, 10 October 2013 diff hist +1,160‎ N Chalk Group Lithostratigraphy: Northern England - Ravendale Flint ‎ Created page with "This is the lowest tabular flint in the Chalk Group of northern England, although it might sometimes be semitabular, and locally occurs as huge elliptical masses (Wood & Smith..." current
• 14:2714:27, 10 October 2013 diff hist +3,758‎ N Chalk Group Lithostratigraphy: Northern England - Burnham Chalk Formation ‎ Created page with "The Burnham Chalk is characterised by the occurrence of common, predominantly tabular flints and thin-bedded (so called 'laminate') chalk with marl seams (Gaunt ''et al''., 19..." current
• 14:2514:25, 10 October 2013 diff hist +634‎ N Chalk Group Lithostratigraphy: Northern England - Beacon Hill Marl ‎ Created page with "The Beacon Hill Marl (stratotype: Beacon Hill [TA 025 197] ) is typically up to 20 mm thick (although locally reduced to just a marl wisp) and usually overlies a bed of ellipt..." current
• 14:2414:24, 10 October 2013 diff hist +681‎ N Chalk Group Lithostratigraphy: Northern England - Deepdale Upper Marl ‎ Created page with "Always thinner (c. 30 mm) than the Deepdale Lower Marl, and usually about 2 m higher in the succession , with common ferruginous pseudomorphs of the small brachiopod ''Terebra..." current
• 14:2314:23, 10 October 2013 diff hist +1,186‎ N Chalk Group Lithostratigraphy: Northern England - Deepdale Lower Marl ‎ Created page with "The Deepdale Lower Marl (stratotype: Deepdale Pit [TA 0455 1820] ), immediately overlying chalk with large specimens of the bivalve ''Inoceramus'', is c. 80 mm thick, with a s..." current
• 14:2214:22, 10 October 2013 diff hist +1,275‎ N Chalk Group Lithostratigraphy: Northern England - Deepdale Flint ‎ Created page with "A bed of flattened flints up to 80 mm thick, locally becoming semitabular, and usually overlain by a nodular flint band containing the lowest recorded specimens of the echinoi..." current
• 14:2114:21, 10 October 2013 diff hist +1,155‎ N Chalk Group Lithostratigraphy: Northern England - Riby Marl ‎ Created page with "The Riby Marl, up to 50 mm thick, is named after Riby Quarry [TA 174 062] (Wood & Smith, 1978), and falls in the interval between the Southerham Marl 2 and Caburn Marl of the ..." current
• 14:1914:19, 10 October 2013 diff hist +1,040‎ N Chalk Group Lithostratigraphy: Northern England - Melton Ross Marl ‎ Created page with "A green-brown, c. 100 mm thick marl (Wood & Smith, 1978), equated with the Southerham Marl 1 in the basal Lewes Nodular Chalk of southern England., and the Mt. Ephraim Marl of..." current
• 14:1814:18, 10 October 2013 diff hist +784‎ N Chalk Group Lithostratigraphy: Northern England - Ferruginous Flint ‎ Created page with "This is a semitabular flint, up to 0.18 m thick (Wood & Smith, 1978), with pyrite-coated fracture surfaces, the oxidation of which produces a distinctive red or orange colour ..." current
• 14:1714:17, 10 October 2013 diff hist +606‎ N Chalk Group Lithostratigraphy: Northern England - Yarborough Marl ‎ Created page with "The Yarborough Marl, named after Yarborough Earthworks overlooking Melton Ross Quarry [TA 086 115], is a 0.25 m thick marl complex just below the Ferruginous Flint, typically ..." current
• 12:2112:21, 10 October 2013 diff hist +1,666‎ N Chalk Group Lithostratigraphy: Northern England - Barton Marls ‎ Created page with "The Barton Marls comprise four marl seams (10-20 mm thick) in an interval of c. 5 m at Welton Wold Quarry [SE 970 282] (Whitham, 1991). Gaunt ''et al''. (1992, p. 90) recorded..." current
• 12:1912:19, 10 October 2013 diff hist +583‎ N Chalk Group Lithostratigraphy: Northern England - Croxton Marl ‎ Created page with "Up to 10 mm thick marl, midway between the Grasby Marl and Barton 1 Marl, locally with small closely spaced burrow-form flints beneath, and typically marked by an overhang in ..." current
• 12:1812:18, 10 October 2013 diff hist +819‎ N Chalk Group Lithostratigraphy: Northern England - Grasby Marl ‎ Created page with "The Grasby Marl is c. 20 mm thick at Welton Wold Quarry [SE 970 282] (Whitham, 1991), and equates with the Methwold Marl of the East Anglian Chalk Group succession (Arthurton ..." current
• 12:1612:16, 10 October 2013 diff hist +676‎ N Chalk Group Lithostratigraphy: Northern England - Hall Farm Marl ‎ Created page with "A thin (less than 5mm) marl immediately underlain by a rubbly, locally iron-stained and indurated chalk bed; an association that makes it a conspicuous marker in quarry sectio..." current
• 12:1512:15, 10 October 2013 diff hist +762‎ N Chalk Group Lithostratigraphy: Northern England - First Main Flint ‎ Created page with "This bed comprises closely spaced nodular flints with a complex morphology, and locally may appear as a semicontinuous flint extending for a metre or more laterally (Gaunt ''e..." current
• 12:1412:14, 10 October 2013 diff hist +1,202‎ N Chalk Group Lithostratigraphy: Northern England - Chalk Hill Marls ‎ Created page with "A group of three closely spaced (occupying a c. 0.25 m interval) thin marls (5-10 mm thick) that mark the top of the ''Mytiloides''-rich shell detrital chalk of the basal Welt..." current
• 12:1212:12, 10 October 2013 diff hist +4,362‎ N Chalk Group Lithostratigraphy: Northern England - Black Band ‎ Created page with "The Black Band s.s. is a name restricted to the dark carbonaceous marl at the centre of a c. 0.5 m thick complex of buff-brown, grey, purple and khaki marls at the base of the..." current