The BGS Lexicon of Named Rock Units — Result Details
Pershore Sand And Gravel Member
| Computer Code: | PERT | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Pleistocene Epoch (QP) — Pleistocene Epoch (QP) | ||
| Lithological Description: | Predominantly cold phase sands and gravels that underlie the Avon Fifth Terrace of Tomlinson (1925) and of BGS maps (sheets 199, 200 and 215). Dominated by clasts of "Bunter" quartz/quartzite lithologies with subordinate flint. | ||
| Definition of Lower Boundary: | Unconformable, commonly channelled base on Lower Jurassic or Triassic bedrock. | ||
| Definition of Upper Boundary: | Ground surface. | ||
| Thickness: | 0 to c 7m | ||
| Geographical Limits: | Lower Avon valley, Stratford-upon-Avon to Tewkesbury. (BGS Sheets 199, 200, 216). | ||
| Parent Unit: | Warwickshire Avon Valley Formation (AVON) | ||
| Previous Name(s): | Avon Fifth Terrace [Deposits]
(-2366)
No 5 Terrace [Deposits] (-3609) Fifth Terrace [Deposits] (-4250) Fifth Or Pershore Terrace [Deposits] (-2973) Pershore Member (-446) Pershore Terrace Deposits (Warwickshire Avon) (-447) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Allesborough Hill road cutting, near Pershore, Warwickshire. Whitehead, i989 [in which the NGR of the site is wrongly quoted as SO 038 464]. | ||
| Reference(s): | |||
| Maddy, D, Keen, D H, Bridgland, D R and Green, C P. 1991. A revised model for the Pleistocene development of the River Avon, Warwickshire. Journal of the Geological Society of London, Vol.148, 473-484. | |||
| Williams, B J and Whittaker, A. 1974. Geology of the country around Stratford-upon-Avon and Evesham. Memoir of the Geological Survey of Great Britain Sheet 200 (England and Wales). | |||
| 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). | |||
| Tomlinson, M E. 1925. The river terraces of the lower valley of the Warwickshire Avon. Quarterley Journal of the Geological Society of London. Vol.81, 137-169. | |||
| Whitehead, P F. 1989. The development and sequence of deposition of the Avon Valley river terraces. 37-41 in Keen, D H, 1989. The Pleistocene of the West Midlands. Field Guide. [Cambridge: Quaternary Research Association.] | |||
| 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). | |||
| Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E199 E200 E216 | |||