The BGS Lexicon of Named Rock Units — Result Details
Cotgrave Sandstone Member
| Computer Code: | COT | Preferred Map Code: | Cot |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Carnian Age (TC) — Carnian Age (TC) | ||
| Lithological Description: | Sandstone, fine- to medium-grained dolomitic, pale greenish grey, interbedded with mudstone and siltstone, dark greenish-grey. Common gypsum nodules. | ||
| Definition of Lower Boundary: | Conformable, at the abrupt base of the lowest pale grey sandstone bed of the Cotgrave Sandstone Member where it overlies the red-brown mudstone of the underlying Gunthorpe Member. | ||
| Definition of Upper Boundary: | Conformable, at the abrupt or rapid upward transition from interbedded green mudstone and pale grey fine-grained sandstone of the Cotgrave Sandstone Member to reddish brown structureless mudstone at the base of the Edwalton Member. | ||
| Thickness: | 1 to 5 m (4.5 m in Cropwell Bridge Borehole, SK63NE/28). | ||
| Geographical Limits: | Mappable at surface in south Nottinghamshire and Leicestershire; not traced north of Newark. | ||
| Parent Unit: | Sidmouth Mudstone Formation (SIM) | ||
| Previous Name(s): | Cotgrave Skerry (Member) [Obsolete Name and Code: Use COT]
(-2716)
Cotgrave Skerry Member [Obsolete Name and Code: Use COT] (-1454) Cotgrave Skerry [Obsolete Name and Code: Use COT] (-1453) Cotgrave Place Skerry [Obsolete Name and Code: Use COT] (-4566) |
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| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Cropwell Bridge Borehole (SK63NE/28), Cropwell Bishop, Notts.; depth range 80.4 m-84.9 m. Curated core held at BGS Keyworth. | ||
| Reference Section | Fulbeck 1 Borehole (SK85SE/25), Fulbeck, Lincs.; depth range 199.4 m-200.1 m. Curated core held at BGS Keyworth. | ||
| Reference Section | Surface section, in north bank of gullied trackway to west of Kneeton, Notts. Exposes entire thickness (2.7 m). | ||
| Reference(s): | |||
| Warrington, G, Audley-Charles, M G, Elliott, R E, Evans, W B, Ivimey-Cook, H C, Kent, P E, Robinson, P L, Shotton, F W and Taylor, F M. 1980. A correlation of the Triassic rocks in the British Isles. Special Report of the Geological Society of London, No.13. | |||
| Charsley, T J, Rathbone, P A and Lowe, D J, 1990. Nottingham: A geological background for planning and development. British Geological Survey Technical Report WA/90/1. | |||
| Elliott, R E 1961. The stratigraphy of the Keuper Series in southern Notinghamshire. Proceedings of the Yorkshire Geological Society, Vol.33, 197-231. | |||
| Howard, A S, Warrington, G, Ambrose, K, and Rees, J G. 2008. A formational framework for the Mercia Mudstone Group (Triassic) of England and Wales. British Geological Survey Research Report, RR/08/04. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E126 E142 E141 | |||