The BGS Lexicon of Named Rock Units — Result Details

Coniston Group

Computer Code: CTG Preferred Map Code: CTG
Status Code: Full
Age range: Gorstian Age (SG) — Gorstian Age (SG)
Lithological Description: Sandstone, siltstone and laminated hemipelagite. NOTE: All component parts have individually defined type sections or areas. These cover the entire group: see Yewbank, Moorhowe, Poolscar, Latrigg and Gawthaite formations.
Definition of Lower Boundary: Conformably overlies the Wray Castle Formation.
Definition of Upper Boundary: Conformably overlain by the Bannisdale Formation.
Thickness: 1400-1900m
Geographical Limits: Southern Lake District and north-west Pennines.
Parent Unit: Windermere Supergroup (WIN)
Previous Name(s): Coniston Grits (-3338)
Coniston Grit Formation (-2728)
Alternative Name(s): Coniston Subgroup
Stratotypes:
none recorded or not applicable
Reference(s):
Marr J E. 1892. On the Wenlock and Ludlow strata of the Lake District. Geological Magazine, Vol. 9, p 534-541. 
Moseley F. 1984. Lower Palaeozoic lithostratigraphical classification in the English Lake District. Geological Journal, Vol. 19, p. 239-247. 
Kneller, B C. 1990. The Wenlock rocks of sheet 38 (Ambleside). British Geological Survey Technical Report, WA/90/64 
Cocks, L R M, Holland, C H and Rickards, B. 1992. A revised correlation of Silurian rocks in the British Isles. Geological Society of London Special Report. No.21, 32pp. 
Lawrence, D J D, Webb, B C, Young, B and White, D E. 1986. The geology of the Late Ordovician and Silurian rocks (Windermere Group) in the area around Kentmere and Crook. Includes map, 1:25,000 series, Parts of Sheets NY40 and SD49 Kentmere and Crook, Solid and Drift Geology. Report of the British Geological Survey, 18/5. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E039 E038 E040 E048 E049