| Computer Code: |
FD |
Preferred Map Code: |
notEntered |
| Status Code: |
Pending Upgrade |
| Age range: |
Marine Isotope Stage 6 (QMIS006)
— Marine Isotope Stage 4 (QMIS004) |
| Lithological Description: |
Pebbly and shelly, sandy silty clay to clayey silty sand. Stiff to very stiff, possibly till. Shell fragments common at top, middle and base of unit, sand and clay partings are common. Less sandy than underlying Mariner Formation, geotechnically stronger than overlying Cape Shore Formation. |
| Definition of Lower Boundary: |
Lower boundary is a marked unconformity with "channeling" up to 50 metres deep. In places erosion has removed all Quaternary material below this reflector. |
| Definition of Upper Boundary: |
The upper boundary is unconformable with Holocene sand at the sea bed or apparently conformable/disconformable below the Cape Shore Formation. |
| Thickness: |
50 metres. Thins to south and west. Thickens to north and east on the North Sea Plateau and may be 200 metres or more in the northern part of the Norwegian Trench. |
| Geographical Limits: |
Not defined. |
| Parent Unit: |
Hjaltland Glacigenic Group (HJG)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| none recorded or not applicable |
| Reference(s): |
| Stoker, M S, Balson, P S, Long, D, and Tappin, D R. 2011. An overview of the lithostratigraphical framework for the Quaternary deposits on the United Kingdom continental shelf. British Geological Survey Research Report, RR/11/03. 48pp. |
| Johnson, H, Richards, P C, Long, D, and Graham, C C. 1993. United Kingdom offshore regional report: the geology of the northern North Sea. (London: HMSO for the British Geological Survey.) |
| Stoker, M S, Hitchen, K, and Graham, C C. 1993. United Kingdom offshore regional report: the geology of the Hebrides and West Shetland shelves and adjacent deep-water areas. (London: HMSO for the British Geological Survey.) |
| Cameron, T D J, and Holmes, R. 1999. The Continental Shelf. 125-139 in A revised correlation of Quaternary deposits in the British Isles. Bowen, D Q (editor). Special Report of the Geological Society of London, No. 23. |
| Rise, L, Rokoengen, K, Skinner, A C, and Long, D. 1984. Nordlige Nordsjø. Kvartaergeologisk kart mellom 60°30’ og 62°N, og øst for 1°Ø (Northern North Sea. Quaternary geology map between 60°30’ and 62°N, and east of 1°E) M 1:500 000. Institutt for kontinentalsokkelundersøkelser (IKU), Norway. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
