The BGS Lexicon of Named Rock Units — Result Details

Keresley Member

Computer Code: KRS Preferred Map Code: Krs
Status Code: Full
Age range: Asturian Substage (CAS) — Stephanian Stage (CS)
Lithological Description: Redbed sequence; mudstone dominated in lower part but becoming increasingly arenaceous towards top. Thin Spirorbis limestone beds at some levels. Impersistent conglomerates in upper part.
Definition of Lower Boundary: Taken immediately above the sandstone unit named informally as the Arley and Exhall sandstones at the top of the Whitacre Member.
Definition of Upper Boundary: Taken at the highest mappable sandstone (Corley Sandstone) beneath the basal argillaceous sequence of the overlying Allesley Member.
Thickness: Range 197m-306m. Mean 258m
Geographical Limits: Warwickshire Coalfield (northern part) sheet 169. Also likely to extend in the subcrop across the southern part of the Warwickshire Coalfield. (sheet 184).
Parent Unit: Salop Formation (SAL)
Previous Name(s): Coventry Sandstone (Middle Part) (-2881)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Staircase Lane Borehole SP38SW/97 uncored but with good geophysical signature. Base 363m below surface; top 78m below surface. 
Reference Section  Cliff section; roadside exposure 200m northeast of Corley village exposes sandstones in the upper part of the Member (Corley Sandstone). 
Type Area  Warwickshire Coalfield; centred on the village of Corley (SP 30 85), extending from the coalfield Western Boundary Fault into northwest Coventry (poorly exposed throughout). 
Reference(s):
Eastwood, T, Gibson, W, Cantrill, T C and Whitehead, T H. 1923. The geology of country around Coventry, including an account of the Carboniferous rocks of the Warwickshire Coalfield. Memoir of the Geological Survey of Great Britain, Sheet 169. (England and Wales). 
Powell, J H, Chisholm, JI, Bridge, D M, Rees, J G, Glover, B W and Besly, B M. 1999. Stratigraphical framework for Westphalian to Early Permian red-bed successions of the Pennine Basin. British Geological Survey Technical Report WA/99/10. 
Old, R A, Sumbler, M G and Ambrose, K, 1987. Geology of the country around Warwick. Memoir of the British Geological Survey, Sheet 184 (England and Wales). 
Bridge, D McC, Carney, J N, Lawley, R S and Rushton, A W A. 1998. Geology of the country around Coventry and Nuneaton. Memoir of the British Geological Survey, Sheet 169 (England and Wales). 
Old, R A, 1990. Geology of the Coventry area. British Geological Survey Technical Report WA/89/29. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E169