The BGS Lexicon of Named Rock Units — Result Details
Irish Sea Coast Glacigenic Subgroup
| Computer Code: | ISCG | Preferred Map Code: | ISC |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Devensian Stage (QD) — Devensian Stage (QD) | ||
| Lithological Description: | Diamicton, gravel, sand, silt and clay, typically reddish brown and containing clasts of red and yellow sandstone, wacke sandstone and siltstone, granite and granodiorite. Welded tuff (Borrowdale Volcanic Group), mudstone, coal, shell fragments and reworked marine microfossils are common to the south of the Solway Firth. | ||
| Definition of Lower Boundary: | Unconformable on bedrock. | ||
| Definition of Upper Boundary: | Ground surface or unconformable contact with units of the Britannia Catchments Group and the British Coastal Deposits Group. | ||
| Thickness: | Up to 50 m. | ||
| Geographical Limits: | Solway lowlands, Vale of Eden, west Cumbria, Isle of Man, Lancashire, Cheshire, north and west Wales. | ||
| Parent Unit: | Caledonia Glacigenic Group (CALI) | ||
| Previous Name(s): | West Cumbria Drift Group [Obsolete Name And Code: See ISCG]
(WCDR)
Irish Sea Drift (-980) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| none recorded or not applicable | |||
| Reference(s): | |||
| Merrit, J W and Auton, C A. 2000. An outline of the lithostratigraphy and depositional history of Quaternary deposits in the Sellafield district, west Cumbria. Proceedings of the Yorkshire Geological Society, Vol.53, 129-154 | |||
| Trotter, F M and Hollingworth, S E, 1932. The glacial sequence in the North of England. Geological Magazine, Vol.69, 374-380. | |||
| Akhurst, M C, Chadwick, R A, Holliday, D W, McCormac, M, McMillan, A A, Millward, D, Young, B, Ambrose, K, Auton, C A, Barclay, W J, Barnes, R P, Beddoe-Stephens, B, James, J C W, Johnson, H, Jones, N S, Glover, B W, Hawkins, M P, Kimbell, G S, MacPherson, K A T, Merritt, J W, Milodowski, A E, Riley, N J, Robins, N S, Stone, P, and Wingfield, R T R. 1997. The geology of the west Cumbria district. Memoir of the British Geological Survey, Sheets 28, 37 and 47 (England and Wales). 138pp. | |||
| 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. | |||
| McMillan, A A, Hamblin, R J O, and Merritt, J W. 2011. A lithostratigraphical framework for onshore Quaternary and Neogene (Tertiary) superficial deposits of Great Britain and the Isle of Man. British Geological Survey Research Report, RR/10/03. 343pp. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| none recorded or not applicable | |||