The BGS Lexicon of Named Rock Units — Result Details

Shackleton Formation

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
none recorded or not applicable
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