The BGS Lexicon of Named Rock Units — Result Details

Swindale Limestone Formation

Computer Code: SWL Preferred Map Code: SwL
Status Code: Full
Age range: Ashgill Series (OA) — Ashgill Series (OA)
Lithological Description: Grey nodular limestone with intercalations of pale grey mudstone with limestone nodules
Definition of Lower Boundary: Taken at the base of limestone unconformably overlying mudstone of the Dufton Shale Formation. The extent of the unconformity is appreciated only from the faunal evidence
Definition of Upper Boundary: Taken at the base of mudstones belonging to the unconformably overlying Ashgill Formation
Thickness: About 19m
Geographical Limits: Restricted to the Cross Fell Inlier, Cumbria
Parent Unit: Dent Group (DNT)
Previous Name(s): Staurocephalus Limestone (-3345)
Alternative Name(s): none recorded or not applicable
Type Section  Swindale Beck, Cross Fell Inlier, Cumbria Owen and Rushton, 1999 
Reference Section  Melmerby Road, [A686, Penrith to Alston), Cumbria Owen and Rushton, 1999 
Owen, A W and Rushton, A W A, 1999. Arenig to Ashgill of northern England. pp 259-292 in Rushton, A W A, Owen, A W, Owens, R M, and Prigmore, J K. British Cambrian to Ordovician stratigraphy. Geological Conservation Review, Vol. 18. Joint Nature Conservation Committee. Peterborough. 
Burgess, I C and Holliday, D W. 1979. Geology of the country around Brough-under-Stainmore. Memoir for 1:50 000 geological sheet 31 and parts of sheets 25 and 30. Geological Survey of Great Britain (England and Wales). [London: HMSO.] 131pp. 
Arthurton, R S, and Wadge, A J. 1981. Geology of the country around Penrith. Memoir for geological sheet 24. Institute of Geological Sciences, London, HMSO. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E031 E024 E030