The BGS Lexicon of Named Rock Units — Result Details
Thatcham Gravel Member
Computer Code: | THGR | Preferred Map Code: | symb |
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Status Code: | Full | ||
Age range: | Wolstonian Stage (QO) — Devensian Stage (QD) | ||
Lithological Description: | Represents the deposits of the third terrace of the Kennet valley on BGS maps. Gravel, variably sandy and clayey. | ||
Definition of Lower Boundary: | Sharp erosional base on Cretaceous-Tertiary bedrock. | ||
Definition of Upper Boundary: | The terrace, which is modified by erosion, is about 8-10 m above the Kennet Floodplain. | ||
Thickness: | It comprises 3-4 m of gravel underlying the terrace surface at Thatcham. | ||
Geographical Limits: | Kennet Valley. | ||
Parent Unit: | Kennet Valley Formation (KNTV) | ||
Previous Name(s): | Valley Gravel
(VLGR)
Valley Gravel (VLGR) |
||
Alternative Name(s): | none recorded or not applicable | ||
Stratotypes: | |||
Type Area | Kennet Valley: Thatcham - Reading. | ||
Reference(s): | |||
McMillan, A A, Hamblin, R J O, and Merritt, J W. 2011. A lithostratigraphical framework for onshore Quaternary and Neogene (Tertiary) superficial deposits of Great Britain and the Isle of Man. British Geological Survey Research Report, RR/10/03. 343pp. | |||
Cheetham, C H, 1975. Late Quaternary palaeohydrology with reference to the Kennet Valley, PhD Thesis, University of Reading. | |||
Aldiss, D T, Newell, A J, Smith, N J P, and Woods, M A. 2006. Geology of the Newbury district. Sheet Explanation of the British Geological Survey. Sheet 267 (England and Wales). | |||
Chartres, C J, 1975. Soil Development on the terraces of the River Kennet, PhD Thesis, University of Reading. | |||
Worsley, P and Collins, P E F. 1995. The geomorphological context of the Brimpton Late Pleistocene succession. Proceedings of the Geologists' Association, Vol.106, 39-45. | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
E268 |