The Caledonia Glacigenic Group is a

Quaternary The Quaternary ( ) is the current and most recent of the three periods of the Cenozoic Era in the geologic time scale of the International Commission on Stratigraphy (ICS). It follows the Neogene Period and spans from 2.58 million years ...

lithostratigraphic group (a sequence of

rock strata In geology and related fields, a stratum ( : strata) is a layer of rock or sediment characterized by certain lithologic properties or attributes that distinguish it from adjacent layers from which it is separated by visible surfaces known as ei ...

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 In geography and geology, fluvial processes are associated with rivers and streams and the deposits and landforms created by them. When the stream or rivers are associated with glaciers, ice sheets, or ice caps, the term glaciofluvial or fluvio ...

, 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. The following subgroups are defined: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, * 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

{{Reflist Quaternary geologic formations Geology of England Geology of Scotland Geology of Wales Geological groups of the United Kingdom