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 |