The BGS Lexicon of Named Rock Units — Result Details
Dollis Hill Gravel Member
Computer Code: | DHGR | Preferred Map Code: | notEntered |
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Status Code: | Full | ||
Age range: | Cromerian Stage (QC) — Anglian Stage (QA) | ||
Lithological Description: | Gravel, sandy and clayey in part, with laminated beds of silty clay, peat and organic material. | ||
Definition of Lower Boundary: | Rests unconformably on bedrock geology. | ||
Definition of Upper Boundary: | Overlain by Anglian Till in many places; otherwise at surface. | ||
Thickness: | 1-15 m. | ||
Geographical Limits: | Tributary of ancestral River Thames in the Finchley - Hoddesdon area of North London. | ||
Parent Unit: | Sudbury Formation (SBRY) | ||
Previous Name(s): | Dollis Hill Gravel Formation [Obsolete Name and Code: Use DHGR]
(-3359)
Glacial sand and gravel [Obsolete Name and Code] (GSG) |
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Alternative Name(s): | none recorded or not applicable | ||
Stratotypes: | |||
Type Section | Temporary exposure on Dollis Hill [TQ 2353 8825] near Hendon (Gibbard, 1979). | ||
Reference(s): | |||
Strange, P J. 1992. A new nomenclature for the River Terrace Deposits of North London. British Geological Survey Technical Report, WA/92/52. | |||
Gibbard, P L. 1979. Middle Pleistocene drainage in the Thames Valley. Geological Magazine, Vol.116, 35-44. | |||
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. | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
E256 |