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): Fifth Terrace [Deposits] (-4250)
Fifth Or Pershore Terrace [Deposits] (-2973)
Pershore Member (-446)
Pershore Terrace Deposits (Warwickshire Avon) (-447)
No 5 Terrace [Deposits] (-3609)
Avon Fifth Terrace [Deposits] (-2366)
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):
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, 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.] 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E199 E200 E216