The BGS Lexicon of Named Rock Units — Result Details
Allesley Member
| Computer Code: | ASY | Preferred Map Code: | Asy |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Asturian Substage (CAS) — Stephanian Stage (CS) | ||
| Lithological Description: | Redbed sequence; mudstone-dominated at base but becoming more arenaceous towards top. Impersistent conglomerates at some levels. | ||
| Definition of Lower Boundary: | Taken at the junction between the highest sandstone package in the Keresley Member (Corley Sandstone) and the overlying mudstone unit. | ||
| Definition of Upper Boundary: | Defined at the incoming of mudstones of the essentially argillaceous Tile Hill Mudstone Formation. | ||
| Thickness: | c. 140 m. | ||
| Geographical Limits: | Warwickshire Coalfield (Sheet 169). Also likely to extend in the subcrop across the southern part of the Coalfield (Sheet 184). | ||
| Parent Unit: | Salop Formation (SAL) | ||
| Previous Name(s): | Coventry Sandstone Formation [Obsolete Name And Code: See ASY]
(CYS)
Allesley Conglomerate [Obsolete Name and Code: Use AYC, ASY] (-3808) Coventry Sandstone [Obsolete Name and Code: Use CYS, ASY] (-3809) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Reference Section | Mount Nod Well No 2, Coventry SP27NE/46. Top of Allesley Member proved at 38.3m below surface. Base of Allesley Member proved at 170.5m below surface. | ||
| Type Area | Warwickshire Coalfield; outcrops centred on the village of Allesley and extending from the Western Boundary Fault to the western suburbs of Coventry (poor exposure). | ||
| Reference(s): | |||
| 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). | |||
| Old, R A, Bridge, D M and Rees, J G, 1990. Geology of the Coventry area. British Geological Survey Technical Report, WA/89/29 | |||
| 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). | |||
| Bridge, D M, 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). | |||
| Powell, J H, Chisholm, JI, Bridge, D M, Rees, J G, Glover, B W and Besly, B M. 2000. Stratigraphical framework for Westphalian to Early Permian red-bed successions of the Pennine Basin. British Geological Survey Technical Report WA/99/10. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E169 | |||