List of Geological Groups of Great Britain

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The content is sourced from: https://handwiki.org/wiki/Earth:List_of_geological_groups_of_Great_Britain

This is a sortable list of the groups into which the rock succession of Great Britain and surrounding seas is formally divided. Rock sequences are described by geologists by dividing them hierarchically thus: individual 'beds' of rock (or in the case of certain volcanic rocks, 'flows') are grouped into 'members', members are grouped into 'formations', formations into 'groups' and groups occasionally into 'supergroups'. Some groups are also subdivided into 'subgroups'. Not all of these hierarchical layers are necessarily present or defined within a particular rock succession. Many of these groups will be encountered as 'series' in older geological literature or indeed simply as the proper name e.g. 'Dalradian' or 'Millstone Grit' though care needs to be exercised as many of the names have or have had other meanings which may not coincide with the assemblage of rocks referred to formally through designation as a 'group'. Note that with all such stratigraphical terms as 'groups', 'formations' and 'members' it is standard practice to capitalise both the proper name and the 'term-word' as per the recommendation of the International Commission on Stratigraphy e.g. Wentnor Group and not Wentnor group. Notes:

stratigraphical stratigraphy 'dalradian'

1. Supergroups

The following 'supergroups', i.e. assemblages of 'groups', are recognised:

Carboniferous Limestone Supergroup
Culm Supergroup
Dalradian Supergroup
Great Britain Superficial Deposits Supergroup
Leadhills Supergroup
Longmyndian Supergroup
Moine Supergroup
New Red Sandstone Supergroup
Old Red Sandstone Supergroup
Pebidian Supergroup
Windermere Supergroup

2. Subgroups

The following 'subgroups', i.e. subdivisions of 'groups', have been named:^[1]^[2]

Albion Glacigenic Group:

Shetland Glacigenic (Albion) Subgroup
Western Isles (Albion) Glacigenic Subgroup
Northwest Highlands (Albion) Glacigenic Subgroup
Banffshire Coast and Caithness (Albion) Glacigenic Subgroup
Inverness (Albion) Glacigenic Subgroup
East Grampian (Albion) Glacigenic Subgroup
Logie-Buchan (Albion) Glacigenic Subgroup
Central Grampian (Albion) Glacigenic Subgroup
Mearns (Albion) Glacigenic Subgroup
Midland Valley (Albion) Glacigenic Subgroup
Borders (Albion) Glacigenic Subgroup
Southern Uplands (Albion) Glacigenic Subgroup
Irish Sea Coast (Albion) Glacigenic Subgroup
Manx (Albion) Glacigenic Subgroup
Central Cumbria (Albion) Glacigenic Subgroup
North Pennine (Albion) Glacigenic Subgroup
North Sea Coast (Albion) Glacigenic Subgroup
Wales (Albion) Glacigenic Subgroup

Appin Group:

Blair Atholl Subgroup
Ballachulish Subgroup
Lochaber Subgroup

Ardmillan Group:

Ardwell Subgroup
Drummuck Subgroup
Whitehouse Subgroup

Argyll Group:

Tayvallich Subgroup
Crinan Subgroup
Easdale Subgroup
Islay Subgroup

Badenoch Group:

Dava Subgroup
Glen Banchor Subgroup

Britannia Catchments Group:

Northern Highlands and Argyll Catchments Subgroup
Grampian Catchments Subgroup
Tay Catchments Subgroup
Forth Catchments Subgroup
Clyde Catchments Subgroup
Tweed Catchments Subgroup
Solway Catchments Subgroup
Northumbria Catchments Subgroup
Isle of Man Catchments Subgroup
Cheshire-North Wales Catchments Subgroup
Yorkshire Catchments Subgroup
Trent Catchments Subgroup
Severn and Avon Catchments Subgroup
West Wales Catchments Subgroup
Ouse-Nene Catchments Subgroup
Yare Catchments Subgroup
Somerset Catchments Subgroup
Thames Catchments Subgroup
Suffolk Catchments Subgroup
Cornubian Catchments Subgroup
Solent Catchments Subgroup
Sussex Catchments Subgroup
South Kent Catchments Subgroup

Grampian Group

Glen Spean Subgroup
Corrieyairack Subgroup
Glenshirra Subgroup

Caledonia Glacigenic Group:

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

Lower Old Red Sandstone Group:

Brecon Subgroup
Cosheston Subgroup
Ditton Subgroup
Downton Subgroup
Milford Haven Subgroup

Pembroke Limestone Group:

Blackrock Limestone Subgroup
Clydach valley Subgroup

Ogwen Group

Nant Ffrancon Subgroup

References

Appin, Argyll & Grampian subgroups after Trewin, N.H. (ed) 2002 The Geology of Scotland, The Geological Society, London p97
Britannia catchments, Albion Glacigenic and Caledonia Glacigenic listings from: 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. ISBN:0 85272 516 7

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1. Supergroups

2. Subgroups

References