The BGS Lexicon of Named Rock Units — Result Details

Hemington Member

Computer Code: HETD Preferred Map Code: SYMB
Status Code: Full
Age range: Pleistocene Epoch (QP) — Holocene Epoch (QH)
Lithological Description: Gravels, sands and loams that underlie the Hemington Terrace. Forms a terrace typically c.0.5 to 1m above the modern floodplain in the type area, and often distinguishable from the latter by the presence of mediaeval ridge and furrow. Generally comprises a lower unit of planar cross-bedded (laterally accreted, meandering river) gravel (up to 5m) and an upper unit of overbank silt (up to 2m); may also include organic muds in channels at the base. Gravel much as Holme Pierrepont Sand and Gravel, i.e. dominated by rounded pebbles of "Bunter" quartz/quartzite (c.80%) with subordinate subangular flint, etc., but typically less sandy and orange-brown (not pinkish).
Definition of Lower Boundary: Unconformable, commonly channelled base, resting (generally) on Holme Pierrepont Sand and Gravel or (more locally) pre-Quaternary bedrock.
Definition of Upper Boundary: Ground surface, or base of alluvium.
Thickness: 0 to c.7m; typically c.5m.
Geographical Limits: Extensively developed along much of the Trent, Derwent and Soar within Sheet 141 and 142; distribution elsewhere uncertain pending resurvey or revision, but probably present at least on adjoining sheets (?125, 126, 140, ?154, 156), where currently mapped mainly as alluvium.
Parent Unit: Trent Valley Formation (TRVA)
Previous Name(s): Hemington Member (HETD)
Hemington Terrace Deposits (-3463)
Ambaston Member (-311)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Hemington Quarry, Hemington Fields, Leicestershire. Brandon, 1996. 
Reference(s):
Carney, J N, Ambrose, K and Brandon A. 2002. Geology of the Melton Mowbray district - a brief explanation of the geological map. British Geological Survey Sheet Explanation, Sheet 142 (England and Wales). 
Knight, D and Howard, A J. 2004. Trent valley landscapes. (King's Lynn: Heritage Marketing and Publications.) 
Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. 
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). 
Brandon, A, 1996. Geology of the Lower Derwent Valley: 1:10 000 Sheets SK33SE, SK43SW and SK43SE. British Geological Survey Technical Report WA/96/07. 
Salisbury, C R, Whitley, P J, Litton, C D and Fox, J L. 1984. Flandrian courses of the River Trent at Colwick, Nottingham. Mercian Geologist, Vol.9. 189-207. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E141 E142