The BGS Lexicon of Named Rock Units — Result Details

Thatcham Gravel

Computer Code: THGR Preferred Map Code: symb
Status Code: Index Level
Age range: Wolstonian Stage (QO) — Devensian Stage (QD)
Lithological Description: Gravel, variably sandy and clayey.
Definition of Lower Boundary: Sharp erosional base on Cretaceous-Tertiary bedrock.
Definition of Upper Boundary: Terrace surface modified by erosion: Thatcham (+8 - 10m) Terrace in Kennet.
Thickness: 3-4m
Geographical Limits: Kennet Valley.
Parent Unit: Not Entered (?)
Previous Name(s): Valley Gravel (VLGR)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Kennet Valley: Thatcham - Reading. 
Reference(s):
Cheetham, C H, 1975. Late Quaternary palaeohydrology with reference to the Kennet Valley, PhD Thesis, University of Reading. 
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