The BGS Lexicon of Named Rock Units — Result Details
Greenscoe Tuff Formation
Computer Code: | GCOE | Preferred Map Code: | GSC |
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Status Code: | Full | ||
Age range: | Caradoc Series (O4) — Caradoc Series (O4) | ||
Lithological Description: | Interbedded sucession of silty mudstone, andesitic lapilli-tuff and tuff-breccia with andesite intrusions. The volcanic component increases up the succession. | ||
Definition of Lower Boundary: | Unconformity. Erosion surface cut in Skiddaw Group. | ||
Definition of Upper Boundary: | Unconformity. Overlain by clastic/carbonate succession of the Dent Group. | ||
Thickness: | none recorded or not applicable | ||
Geographical Limits: | East side of Duddon Estuary (Furness Inlier) between Green Haume (SD 221 751) and Soutergate (SD 227 813), Askam in Furness, Cumbria. | ||
Parent Unit: | Borrowdale Volcanic Group (BVG) | ||
Previous Name(s): | Mottled Shale [Obsolete Name and Code: Use GCOE, WNB]
(-4670)
Mottled Tuff [Obsolete Name and Code: Use GCOE] (-276) |
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Alternative Name(s): | none recorded or not applicable | ||
Stratotypes: | |||
Type Area | Greenscoe Quarry and Greenscoe Cragg south east of Askam in Furness, Cumbria. | ||
Reference(s): | |||
Johnson, E W, Soper, N J, Burgess, I C, Ball, D F, Beddoe-Stephens, B, Carruthers, R M, Fortey, N J, Hirons, S, Merritt, J W, Millward, D, Roberts, B, Walker, A B and Young, B. 2001. Geology of the country around Ulverston. Memoir of the British Geological Survey, England and Wales, Sheet 48. | |||
British Geological Survey. 1994. Askam SD27NW solid and drift 1:10 000. (Keyworth, Nottingham: British Geological Survey.) | |||
Green, J F N, 1913. The older Palaeozoic succession of the Dudden Estuary. London, 23pp. | |||
Rose, W C C. 1977. Geology and Hematite deposits of South Cumbria. Economic Memoir for 1:50,000 Sheet 58 and southern part of Sheet 48. Memoir of the geological Survey of Great Britain. | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
E048 |