Computer Code: |
LHGR |
Preferred Map Code: |
notEntered |
Status Code: |
Full |
Age range: |
Wolstonian Stage (QO)
— Wolstonian Stage (QO) |
Lithological Description: |
Sand and gravel, locally with lenses of silt, clay or peat. [Generic description]. |
Definition of Lower Boundary: |
Rests unconformably on bedrock geology. |
Definition of Upper Boundary: |
At surface. |
Thickness: |
Average 7m, range 1-12m. |
Geographical Limits: |
Thames Valley and associated tributaries. |
Parent Unit: |
Maidenhead Formation (MNHD)
|
Previous Name(s): |
Lynch Hill Gravel Formation [Obsolete Name and Code: Use LHGR]
(-4760)
|
Alternative Name(s): |
Denham Valley Terrace Deposits
|
Stratotypes: |
Type Section |
Lynch Hill, Slough. |
Reference(s): |
Gibbard, P L, 1985. Pleistocene history of the Middle Thames Valley. (London: Cambridge University Press.) |
Strange, P J. 1992. A new nomenclature for the River Terrace Deposits of North London. British Geological Survey Technical Report, WA/92/52. |
Hare, F K, 1947. The geomorphology of a part of the Middle Thames. Proceedings of the Geologists' Association, Vol.58, 294-339. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
E254
E256
E257
E268
E269
E285
|