| Computer Code: |
SHN |
Preferred Map Code: |
notEntered |
| Status Code: |
Pending Upgrade |
| Age range: |
Marine Isotope Stage 62 (QMIS062)
— Marine Isotope Stage 13 (QMIS013) |
| Lithological Description: |
Predominantly a sandy sequence with pebbles and shell fragments. Some clayey partings but generally a well-sorted fine-grained to silty sand. Similar in lithology to base of Mariner Formation above it, but base of unit rests on a variety of lithologies, especially in the west of the area where it onlaps to, or offlaps from, a variety of older strata. |
| Definition of Lower Boundary: |
Unconformable on Pliocene and older strata of varied lithology and competence. |
| Definition of Upper Boundary: |
Unconformable/disconformable or apparently conformable with the sandy material of the overlying Mariner Formation. |
| Thickness: |
40 metres approximately at Borehole 80/1, 90 metres approximately at Borehole 81/18. Thickens to north, east and northwest on North Sea Plateau. May be absent in parts of the Norwegian Trench where it has been eroded away. |
| Geographical Limits: |
Not defined. |
| Parent Unit: |
Zulu Group (ZULU)
|
| 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. |
| 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. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
