The BGS Lexicon of Named Rock Units — Result Details

Holme Pierrepont Sand and Gravel Member

Stratotypes:
Computer Code:	HPSG	Preferred Map Code:	symb
Status Code:	Full
Age range:	Late Pleistocene (QPL) — Late Pleistocene (QPL)
Lithological Description:	Predominantly cold-phase sands and gravels that underlie the Holme Pierrepont Terrace. Generally pinkish, poorly sorted and compositionally rather immature matrix-supported, sandy, trough-cross bedded (braided river) gravels with syndepositional ice-wedge casts. Gravel dominated by rounded pebbles of "Bunter" quartz/quartzite (typically c. 80%), plus flint, Triassic and Upper Carboniferous sandstone, Lower Carboniferous cherts, etc, and other "exotic" lithogies. Forms a fairly well preserved terrace typically 1 to 2 m above the floodplain in the upper and middle Trent, with the deposits extending beneath those of the younger Hemington Terrace and the floodplain alluvium. River terrace deposits. Upper Pleistocene (MI Stage 2).
Definition of Lower Boundary:	Unconformable, commonly channelled base, resting on pre-Quaternary bedrock.
Definition of Upper Boundary:	Ground surface, or base of alluvium or of the Hemington Member.
Thickness:	Typically 0 to c. 12 m; typically up to c. 8 m in the middle Trent valley.
Geographical Limits:	Extensively developed along the upper and middle Trent and tributaries downstream from the Devensian ice limit (on Sheet 140) downstream, and [probably] on the lower Trent to the Humber but precise extent in some areas pending resurvey.
Parent Unit:	Trent Valley Formation (TRVA)
Previous Name(s):	Floodplain sand and gravel [Obsolete Name and Code: Use HPSG] (-3478) Holme Pierrepont Sand and Gravel (-964) Floodplain terrace [Obsolete Name and Code: Use SCSG, HPSG] (-325)
Alternative Name(s):	none recorded or not applicable
Type Section	Holme Pierrepont sand and gravel pits, Nottingham. Lowe, 1989; Charsley et al., 1990.
Reference(s):
Carney, J N, Ambrose, K and Brandon, A. 2001. Geology of the country between Burton, Loughborough and Derby. Description of 1:50k Sheet 141 (England and Wales).
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).
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.
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).
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.
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.
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).
Stoker, M S, McMillan, A A and Waters, C N. Quaternary Stratigraphical Chart: Southern Britain. British Geological Survey, 1 poster.
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.
Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23.
Posnansky, M. 1960. The Pleistocene succession in the middle Trent basin. Proceedings of the Geologists' Association, Vol.17, 285-311.
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E126 E141 E088 E089 E101 E113 E124 E140 E154

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