Quaternary lithostratigraphic group in Great Britain
The Caledonia Glacigenic Group is a Quaternary lithostratigraphic group (a sequence of rock strata or other definable geological units) present across the whole of Great Britain to the north and west of the furthest limit of Devensian glaciation i.e. throughout Scotland , Wales and northern England . It consists of a wide range of deposits deriving from the Devensian glaciation of glacial , glaciofluvial , glaciolacustrine and glaciomarine origin. It was previously known as the South Britain Glacigenic Group. Its upper boundary is the present day ground surface or an unconformable contact with the Britannia Catchments Group or the British Coastal Deposits Group .[ 1]
The following subgroups are defined:[ 2]
Shetland Glacigenic Subgroup
Western Isles Glacigenic Subgroup
Northwest Highlands Glacigenic Subgroup
Banffshire Coast and Caithness Glacigenic Subgroup
Inverness Glacigenic Subgroup
East Grampian Glacigenic Subgroup
Logie-Buchan Glacigenic Subgroup
Central Grampian Glacigenic Subgroup
Mearns Glacigenic Subgroup
Midland Valley Glacigenic Subgroup
Borders Glacigenic Subgroup
Southern Uplands Glacigenic Subgroup
Irish Sea Coast Glacigenic Subgroup
Manx Glacigenic Subgroup
Central Cumbria Glacigenic Subgroup
North Pennine Glacigenic Subgroup
North Sea Coast Glacigenic Subgroup
Wales Glacigenic Subgroup
References
^ "BGS Lexicon of Named Rock Units – Result Details" . Bgs.ac.uk . Retrieved 16 January 2019 .^ McMillan, A A, Hamblin, R J O, and Merritt, J W. 2005. An overview of the lithostratigraphical framework for the Quaternary and Neogene deposits of Great Britain (Onshore). British Geological Survey Research Report RR/04/04 38pp., p. 8, ISBN 0 85272 516 7