The BGS Lexicon of Named Rock Units — Result Details
Blisco Sandstone Member
Computer Code: | BCO | Preferred Map Code: | Bco |
---|---|---|---|
Status Code: | Full | ||
Age range: | Caradoc Series (O4) — Caradoc Series (O4) | ||
Lithological Description: | Andesitic volcaniclastic sandstone with tuff and lapilli-tuff interbeds; bedded succession. | ||
Definition of Lower Boundary: | Overlies Little Stand Tuff; base taken at change from massive rhyolitic tuff to bedded andesitic volcanclastic sandstone. | ||
Definition of Upper Boundary: | Overlain by unnamed dacite within the Birker Fell Andesite Formation. | ||
Thickness: | 0 - 150m | ||
Geographical Limits: | Pike of Blisco to Little Stand between Duddon Valley and Longdale, Cumbria. | ||
Parent Unit: | Birker Fell Andesite Formation (BFA) | ||
Previous Name(s): | Blisco Formation [Obsolete Name and Code: Use BCO]
(-2587)
Blisco Member [Obsolete Name and Code: Use BCO] (-3198) |
||
Alternative Name(s): | none recorded or not applicable | ||
Stratotypes: | |||
Type Area | Pike of Blisco. | ||
Reference(s): | |||
Millward, D, Johnson, E W, Beddoe-Stephens, B, Young, B, Kneller, B C, Lee, M K, Fortey, N J, Allen, P M, Branney, M J, Cooper, D C, Hirons, S, Kokelaar, B P, Marks, R J, McConnell, B J, Merritt, J W, Molyneux, S G, Petterson, M G, Roberts, B, Rundle, C C, Rushton, A W A, Scott, R W, Soper, N J, and Stone, P. 2000. Geology of the Ambleside district. Memoir of the British Geological Survey, England and Wales, Sheet 38. | |||
Branney, M J and Soper, N J, 1988. Ordovician Volcano-tectonics in the English Lake District. Journal of the Geological Society of London, Vol.145, p.367-376. | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
E038 |