| Computer Code: |
PBGR |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Early Pleistocene (QPE)
— Early Pleistocene (QPE) |
| Lithological Description: |
[Obsolete: use NBED, STGR, WHGR]
Gravel, pebble-grade (4-64mm) with subordinate sand and local silt or clay lenses; bedded or chaotic. [Generic description]. |
| Definition of Lower Boundary: |
Rests on pre-Quaternary bedrock. |
| Definition of Upper Boundary: |
Generally at surface. |
| Thickness: |
none recorded or not applicable
|
| Geographical Limits: |
None given. |
| Parent Unit: |
none recorded or not applicable
|
| Previous Name(s): |
Pebble Gravel [Obsolete Name and Code: Use PBGR, STGR]
(-442)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| none recorded or not applicable |
| Reference(s): |
| Gibbard, P L. 1999. The Thames Valley, its tributaries and their former courses. 45-58 in Bowen, D Q (Editor), A revised correlation of Quaternary deposits in the British Isles. [London: The Geological Society.] |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E257
|
