The BGS Lexicon of Named Rock Units — Result Details
Enville Member
| Computer Code: | EN | Preferred Map Code: | En |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Asturian Substage (CAS) — Cisuralian Epoch (PLC) | ||
| Lithological Description: | Red mudstone and red-brown, fine- to coarse-grained sandstone, locally pebbly, and lenticular beds of conglomerate. Sandstone mostly sublitharenite; conglomerate clasts mostly Carboniferous limestone and chert. | ||
| Definition of Lower Boundary: | Poorly defined; taken arbitrarily at base of sandstone dominated succession that overlies the Alveley Member and is characterised by conglomerates and pebbly sandstones with extra-basinal clasts, commonly of Carboniferous limestone and chert. | ||
| Definition of Upper Boundary: | Unconformable/disconformable; sharp junctions with overlying Clent Formation (breccia) in the Clent Hills; gradational boundary with mudstone dominated Clent Formation; or taken at the base of red mudstone/sandstone with Uriconian volcanic clasts in Gospel End area (West Midlands) | ||
| Thickness: | 100-275m in West Midlands. | ||
| Geographical Limits: | Salop and West Midlands. | ||
| Parent Unit: | Salop Formation (SAL) | ||
| Previous Name(s): | Enville Formation [Obsolete Name And Code: See EN]
(EB)
Enville Beds [Obsolete Name and Code: Use EB, EN] (-2164) Bowhills Formation [Obsolete Name And Code: See EN] (BWH) Calcareous Conglomerate Group [Obsolete Name And Code: See EN] (CACG) Hamstead Formation [Obsolete Name And Code: Use EN] (HSB) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Reference Section | BGS Daleswood Farm Borehole (SO97NE/452) from 97.7m (base) to 3.7m depth (close to top of Member). Glover and Powell, 1996 | ||
| Reference Section | Romsley Borehole (SO97NE/216): upper boundary at 8.85m, to 67.35m depth (upper part of Member). Glover and Powell, 1996 | ||
| Type Area | Bowhills and Enville Sheepwalks, between Alveley and Enville villages, (Salop and West Midlands respectively) | ||
| Reference(s): | |||
| Ramsbottom, W H C, Calver, M A, Eagar, R M C, Hodson, F, Holliday, D W, Stubblefield, C J and Wilson, R B. 1978. A correlation of the Silesian rocks in the British Isles. Geological Society of London, Special Report No.10. | |||
| Whitehead, T H and Eastwood, T, 1927. The geology of the southern part of the South Staffordshire Coalfield. Memoir of the Geological Survey of Great Britain. | |||
| Eastwood, T, Whitehead, T H, and Robertson, T. 1925. The geology of the country around Birmingham. Memoir of the British Geological Survey of Great Britain. | |||
| Powell, J H, Glover, B W and Waters, C N, 1992. A Geological background for planning and development in the `Black Country'. British Geological Survey Technical Report WA/92/33. | |||
| 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. | |||
| Old R A, Hamblin, R J O, Ambrose, K, and Warrington G. 1991. Geology of the country around Redditch. Memoir of the British Geological Survey, Sheet 183 (England and Wales). | |||
| Waters, C N, Waters, R A, Barclay, W J, and Davies, J R. 2009. Lithostratigraphical framework for Carboniferous successions of Southern Great Britain (Onshore). British Geological Survey Research Report, RR/09/01. 184pp. | |||
| Whitehead, T H and Pocock, R W. 1947. Geology of the country around Dudley and Bridgnorth. Memoir of the British Geological Survey, Sheet 167. (England and Wales). | |||
| Glover, B M and Powell, J H, 1996. Interaction of climate and tectonics upon alluvial architecture: Late Carboniferous-Early Permian sequences at the southern margin of the Pennine Basin, UK. Palaeogeography, Palaeoclimatology and Palaeoecology, Vol. 121, 13 - 34. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E168 E167 E153 E183 E154 E201 | |||