| Computer Code: |
FHF |
Preferred Map Code: |
notEntered |
| Status Code: |
Pending Upgrade |
| Age range: |
Devensian Stage (QD)
— Devensian Stage (QD) |
| Lithological Description: |
Soft clay and silty clay often with black sulphide laminae and dropstones: significantly less consolidated than underlying sediments. |
| Definition of Lower Boundary: |
Basal erosion surface dissects most quaternary formations in the area. |
| Definition of Upper Boundary: |
Upper surface is irregular, overlain by Whitehorn Member of the Forth Formation. |
| Thickness: |
49.5 metres - variable - as the infill of erosive features. |
| Geographical Limits: |
Not defined. |
| Parent Unit: |
Forth Formation (FH)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| none recorded or not applicable |
| Reference(s): |
| Holmes, R. 1977. Quaternary deposits of the central North Sea 5. The Quaternary geology of the UK sector of the North Sea between 56° and 58° N. Report of the Institute of Geological Sciences, No. 77/14. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
