The BGS Lexicon of Named Rock Units — Result Details

Dollis Hill Gravel Member

Computer Code: DHGR Preferred Map Code: notEntered
Status Code: Full
Age range: Cromerian Stage (QC) — Anglian Stage (QA)
Lithological Description: Gravel, sandy and clayey in part, with some laminated silty beds.Sand and gravel, locally with lenses of silt, clay or peat and organic material - [Generic description].
Definition of Lower Boundary: Rests unconformably on bedrock geology.
Definition of Upper Boundary: Overlain by Anglian Till in many places; otherwise at surface.
Thickness: 1-15m.
Geographical Limits: Tributary of ancestral River Thames in the Finchley - Hoddesdon area of North London.
Parent Unit: Sudbury Formation (SBRY)
Previous Name(s): Glacial Sand and Gravel (GSG)
Dollis Hill Gravel Formation (-3359)
Alternative Name(s): none recorded or not applicable
Type Section  Temporary exposure on Dollis Hill near Hendon. 
Gibbard, P L. 1979. Middle Pleistocene drainage in the Thames Valley. Geological Magazine, Vol.116, 35-44. 
Strange, P J. 1992. A new nomenclature for the River Terrace Deposits of North London. British Geological Survey Technical Report, WA/92/52. 
1:50K maps on which the lithostratigraphical unit is found, and map code used: