The BGS Lexicon of Named Rock Units — Result Details
Spring Hill Sand and Gravel Member
| Computer Code: | SPHT | Preferred Map Code: | symb |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Anglian Stage (QA) — Anglian Stage (QA) | ||
| Lithological Description: | Predominantly cold phase sands and gravels that underlie the Severn Sixth Terrace of BGS Maps (Sheets 199, 216 and ?234). Dominated by clasts of "Bunter" quartz/quartzite lithologies with subordinate flint (c 20% below Avon confluence), with an argillaceous sandy matrix. | ||
| Definition of Lower Boundary: | Unconformable, commonly channelled base on Lower Jurassic or Triassic bedrock. | ||
| Definition of Upper Boundary: | Ground surface. | ||
| Thickness: | Up to c. 7 m. | ||
| Geographical Limits: | Recognised from near Holt Heath (between Stourport and Worcester, Sheet 182) downstream. Currently mapped by BGS only on Sheets 182, 199 and 216. Possibly also present both farther downstream (Sheet 234) and farther upstream (Sheet 167) and also in the lowermost part of the Warwickshire Avon (Sheet 200). | ||
| Parent Unit: | Severn Valley Formation (SEVN) | ||
| Previous Name(s): | Spring Hill Member [Obsolete Name and Code: Use SPHT]
(-4339)
Spring Hill Terrace [Obsolete Name and Code: Use SPHT] (-4340) Spring Hill Terrace Deposits (River Severn) [Obsolete Name and Code: Use SPHT] (-1838) Sixth Terrace [Deposits] [Obsolete Name and Code: Use SPHT] (-2441) Spring Hill Terrace Deposits [Obsolete Name and Code: Use SPHT] (-2442) 6th Terrace (River Severn) [Obsolete Name and Code: Use SPHT] (-3689) Bushley Green Terrace (Upper Part) [Obsolete Name and Code: Use SPHT] (-1197) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Gravel Pit, Spring Hill, Gloucestershire. Maddy et al., 1995. | ||
| Reference(s): | |||
| Mitchell, G H, Pocock, R W, and Taylor, J H. 1962. Geology of the country around Droitwich, Abberley and Kidderminster. Memoir of the Geological Survey of Great Britain, Sheet 182 (England and Wales). | |||
| Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. | |||
| Worssam, B C, Ellison, R A and Moorlock, B S P. 1989. Geology of the country around Tewkesbury. Memoir of the British Geological Survey, Sheet 216 (England and Wales). | |||
| 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. | |||
| Keen, D H. 1989. The Pleistocene of the West Midlands. Field Guide. [Cambridge: Quaternary Research Association.] | |||
| Maddy, D. 2002. An evaluation of climate, crustal movement and base level controls on the Middle-Late Pleistocene development of the River Severn Valley, UK. Netherlands Journal of Geosciences / Geologie en Mijnbouw, Vol.81, 329-338. | |||
| Maddy, D and Lewis, S G. 2005. The lower Severn valley. 73-84 in Lewis, C A and Richards A E (editors), The glaciations of Wales and adjacent area. (Logaston Press). | |||
| 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). | |||
| Wills, L J, 1938. The Pleistocene development of the Severn from Bridgnorth to the Sea. Quarterly Journal of the Geological Society, 94, 161-242. | |||
| Stoker, M S, McMillan, A A and Waters, C N. Quaternary Stratigraphical Chart: Southern Britain. British Geological Survey, 1 poster. | |||
| 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: | |||
| E199 E216 E182 E200 | |||