| Computer Code: |
BOSG |
Preferred Map Code: |
symb |
| Status Code: |
Pending Upgrade |
| Age range: |
Wolstonian Stage (QO)
— Wolstonian Stage (QO) |
| Lithological Description: |
Sand and gravel with minor clay and silt lenses. |
| Definition of Lower Boundary: |
The bedrock surface - commonly cryogenically involuted; other deposits may intervene. |
| Definition of Upper Boundary: |
Top of sand and gravel, commonly corresponding to terrace surface; commonly overlain by head that is involuted with sand and gravel to varying degrees. |
| Thickness: |
To 4.5m |
| Geographical Limits: |
Derwent Valley. |
| Parent Unit: |
Trent Valley Formation (TRVA)
|
| Previous Name(s): |
Lower Hilton Terrace [Obsolete Name and Code: Use BOSG, EGSG]
(-4486)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| none recorded or not applicable |
| Reference(s): |
| Brandon, A. 1996. Geology of the Lower Derwent Valley: 1:10 000 Sheets SK33SE, SK43SW and SK43SE. British Geological Survey Technical Report WA/96/07. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E141
|
