The BGS Lexicon of Named Rock Units — Result Details
Bushley Green Sand and Gravel Member
| Computer Code: | BGT | Preferred Map Code: | symb |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Wolstonian Stage (QO) — Wolstonian Stage (QO) | ||
| Lithological Description: | Gravel, mainly flints and Triassic-derived quartzites. Local basal fossiliferous silts and sands. Sand and gravel, with clay, silt and mammalian bones; Fifth Terrace of the Severn; part of the Severn Valley Formation - [Generic description: academic papers and BGS Memoirs]. | ||
| Definition of Lower Boundary: | Where river deposits overlie bedrock or glacial deposits. | ||
| Definition of Upper Boundary: | The present day terrace surface. | ||
| Thickness: | Up to 9m | ||
| Geographical Limits: | River Severn Basin Chepstow. | ||
| Parent Unit: | Severn Valley Formation (SEVN) | ||
| Previous Name(s): | Bushley Green Terrace Deposits (River Severn) [Obsolete Name and Code: Use BGT]
(-2604)
Bushley Green Terrace Deposits [Obsolete Name and Code: Use BGT] (-3847) Bushley Green Terrace [Obsolete Name and Code: Use BGT] (-4460) Fifth Terrace (River Severn) [Obsolete Name and Code: Use BGT] (-1353) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Quarry, Bushley Green. | ||
| Reference(s): | |||
| Wills, L J, 1938. The Pleistocene development of the Severn from Bridgnorth to the Sea. Quarterly Journal of the Geological Society, 94, 161-242. | |||
| Maddy, D, Green, C P, Lewis, S G and Bowen, D Q. 1995. Pleistocene Geology of the lower Severn Valley, UK. Quaternary Science Reviews, Vol 14, 209 - 222. | |||
| Dawson, M R. 1989. The Severn valley south of Bridgnorth. 78-100 in Keen, D H (Editor), The Pleistocene of the West Midlands. Field Guide. [Cambridge: Quaternary Research Association.] | |||
| Dawson, M, Bryant, I D, 1987. Three-dimensional facies geometry in Pleistocene outwash sediments, Worcestershire, United Kingdom. International Fluvial Sedimentology Conference, 3rd, 1985,Colorado Recent developments in fluvial sedimentology Tulsa, Society of Economic Palaeontologists and Mineralogists, Special Publication 39, p191-196. | |||
| Barclay, W J, Ambrose K, Chadwick, R A, and Pharaoh, T C. 1997. Geology of the country around Worcester. Memoir of the British Geological Survey, Sheet 199 (England and Wales). | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E167 E182 E199 E216 E234 E250 | |||