The BGS Lexicon of Named Rock Units — Result Details
Stoneside Hill Formation [Obsolete: use BFA]
Computer Code: | STHI | Preferred Map Code: | StHi |
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Status Code: | Full | ||
Age range: | Abereiddian Stage (O2) — Caradoc Series (O4) | ||
Lithological Description: | [Obsolete: use BFA] Dacite lavas and possible sills with intercalated volcanogenic sandstone, dacitic tuff and basaltic andesite sills. | ||
Definition of Lower Boundary: | Non-sequence at top of Nettle Crags Tuff Formation. | ||
Definition of Upper Boundary: | Presumed to be non-sequence at top of dacite succession in faulted, and covered by superficial deposits. Overlying strata belong to the Waberthwaite Formation. | ||
Thickness: | At least 700m, top not seen | ||
Geographical Limits: | Bootle Fell - Thwaites Fell area, between the Skiddaw Group and the Eskdale Granodiorite. | ||
Parent Unit: | none recorded or not applicable | ||
Previous Name(s): | Stoneside Hill Tuffs and Lavas (Part) [Obsolete Name and Code: Use STHI]
(-4904)
Nettle Crags Tuff and Lavas (part) [Obsolete Name and Code: Use STHI] (-1204) |
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Alternative Name(s): | none recorded or not applicable | ||
Stratotypes: | |||
Type Area | On Bootle Fell and in Crockley Beck, between Nettle Crags and Stoneside Hill. | ||
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. | |||
Mathieson, N A, 1986 Geology, structure and geochemistry of the Ordovician volcanic succession in south west Cumbria. Unpublished Ph.D. thesis, University of Sheffield. | |||
British Geological Survey. 1994. Black Combe and Bootle, SD18NW, Solid and Drift 1:10 000. (Keyworth, Nottingham: British Geological Survey.) | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
none recorded or not applicable |