The BGS Lexicon of Named Rock Units — Result Details

Shetland (Albion) Glacigenic Subgroup

Computer Code: SDAG Preferred Map Code: SHTA
Status Code: Full
Age range: Cromerian Stage (QC) — Wolstonian Stage (QO)
Lithological Description: A suite of glacial, glaciofluvial and glaciolacustrine deposits that contain clasts derived predominantly from rocks cropping out on the Shetland archipelago, including sandy diamictons (till), sand, gravel, silt and clay. Deposited by ice that radiated outwards from an ice divide positioned along the axis of the archipelago.
Definition of Lower Boundary: Sharp, unconformable contact with bedrock.
Definition of Upper Boundary: Unconformable contact with units of the Shetland Glacigenic Subgroup or Flandrian deposits, predominantly peat.
Thickness: To 10m
Geographical Limits: The Shetland archipelago, Foula and Fair Isle.
Parent Unit: Albion Glacigenic Group (ALBI)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  The Shetland archipelago, Foula and Fair Isle. See also the stratotypes of constituent informal formations documented in Bowen (1999). 
Reference(s):
McMillan, A A, Hamblin, R J O and Merritt, J W. 2005. An overview of the lithostratigraphical framework for the Quarternary and Neogene deposits of Great Britain (onshore). British Geological Survey Research Report RR/04/04. 
Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable