Computer Code: |
WOGR |
Preferred Map Code: |
notEntered |
Status Code: |
Full |
Age range: |
Cromerian Stage (QC)
— Anglian Stage (QA) |
Lithological Description: |
Sand and gravel, locally with lenses of silt, clay or peat and organic material. It occurs as isolated hill top gravel patches at Woodford, lying at 50 - 80 m above OD. |
Definition of Lower Boundary: |
Rests unconformably on bedrock geology. |
Definition of Upper Boundary: |
Overlain in part by Anglian till, otherwise at surface. |
Thickness: |
1-10 m, average 5 m. |
Geographical Limits: |
Tributary of pre-diversionary (ancestral) River Thames, Woodford - Epping area. |
Parent Unit: |
Sudbury Formation (SBRY)
|
Previous Name(s): |
Glacial sand and gravel [Obsolete Name and Code]
(GSG)
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Type Area |
North Circular Road, Woodford, a series of boreholes [TQ 3973 9047]. Here the unit is 3 - 4 m thick. |
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. |
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. |
Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
E256
E257
|