The BGS Lexicon of Named Rock Units — Result Details
Beeston Sand and Gravel Member
| Computer Code: | BSSG | Preferred Map Code: | symb |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Pleistocene Epoch (QP) — Pleistocene Epoch (QP) | ||
| Lithological Description: | Predominantly cold-phase sands and gravels that underlie the Beeston Terrace. Orange-brown sandy gravel, cryoturbated and decalcified in upper part at least, and dominated by rounded pebbles of "Bunter" quartz/quartzite (typically c.80%) with subordinate subangular flint (c.10%), plus minor Triassic and Upper Carboniferous sandstone, Lower Carboniferous chert and silicified limestone; probably contains a moderate proportion of Lower Carboniferous limestone where fresh at depth. Forms a fairly well preserved terrace in the type area, standing c.7m above the Trent alluvium in the type area. Merges into the correlative Allenton Sand and Gravel Member (Derwent Valley Formation), which includes the organic Crown Inn Beds (Ipswichian). Also correlated with the Wanlip Sand and Gravel Member (Soar Valley Formation) and the Fulbeck and ?Scarle Sand and Gravel members (Trent Valley Formation). | ||
| Definition of Lower Boundary: | Unconformable, commonly channelled base, resting on pe-Quaternary bedrock. | ||
| Definition of Upper Boundary: | Ground surface. | ||
| Thickness: | 0-c.5m. | ||
| Geographical Limits: | Developed principally on the north bank of the Trent near the confluence with the Derwent in which the correlative Allenton Sand and Gravel is well developed. Present to a lesser extent elsewhere on Sheet 141 and 126; also thought to be present upstream on the Trent, Dove and Tame but extent uncertain pending resurvey (Sheet 140, 154, ?124). | ||
| Parent Unit: | Trent Valley Formation (TRVA) | ||
| Previous Name(s): | Beeston Terrace [Obsolete Name and Code: Use BSSG, ALSG]
(-2562)
Beeston Sand and Gravel [Obsolete Name and Code: Use BSSG] (-1400) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Long Eaton to Beeston, Nottingham. Brandon, 1996; Carney et al., 2001. The type locality is just downstream of the Derwent confluence in which the correlative Allenton Sand and Gravel has up to 45% Carboniferous limestone at depth, so it would be remarkable if the Beeston didn't also contain Carboniferous limestone. No reliable record of this has yet been found, as there are no sections. The older (pre-Ipswichian) terraces seem to be decalcified throughout. | ||
| Reference(s): | |||
| Barrow, G, Gibson, W, Cantrill, T C, Dixon, E E L, and Cunningham, C H. 1919. The geology of the country around Lichfield. Memoir of the Geological Survey of Great Britain. | |||
| Carney, J N, Ambrose, K and Brandon, A. 2002. Geology of the Loughborough district. Sheet explanation of the British Geological Survey, Sheet 141 (England and Wales). | |||
| Chisholm, J I, Charsley, T J and Aitkenhead, N. 1988. Geology of the country around Ashbourne and Cheadle. Memoir of the British Geological Survey, Sheet 124 (England and Wales). | |||
| Clayton, K M. 1953. The glacial chronology of part of the middle Trent basin. Proceedings of the Geologists' Association, Vol.64. 198-207. | |||
| Lowe, D J. 1989. Geology of the Radcliffe on Trent district. 1:10 000 sheet SK63NW. British Geological Survey Technical Report WA/89/9. | |||
| Posnansky, M. 1960. The Pleistocene succession in the middle Trent basin. Proceedings of the Geologists' Association, Vol.17, 285-311. | |||
| Stevenson, I P and Gaunt, G D, 1971. Geology of the country around Chapel-en-le-Frith. Memoir of the Geological Survey of Great Britain, England and Wales, Sheet 99. | |||
| Brandon, A. 1996. Geology of the Lower Derwent Valley: 1:10 000 Sheets SK33SE, SK43SW and SK43SE. British Geological Survey Technical Report WA/96/07. | |||
| Rice, R J. 1968. The Quaternary Era, 332-355 in: Sylvester-Bradley, P C and Ford, T D (editors). The Geology of the East Midlands. (Leicester University Press). | |||
| Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. | |||
| 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. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E125 E141 E124 E126 E140 E154 | |||