| Computer Code: |
KYL |
Preferred Map Code: |
KyL |
| Status Code: |
Full |
| Age range: |
Ashgill Series (OA)
— Ashgill Series (OA) |
| Lithological Description: |
Dark grey nodular limestone with siltstone partings overlain by grey massive beds of bioclastic limestone that are locally dolomitised; probably lowest part seen comprises dark grey siltstone with thin impure limestone beds. Thin unit of synsedimentary breccia and siltstone at top of Formation. Limestone is locally richly fossiliferous. |
| Definition of Lower Boundary: |
Formation seen only in core of anticline, base not reached. |
| Definition of Upper Boundary: |
Taken at the base of black mudstones of overlying Silurian strata. |
| Thickness: |
More than 50m |
| Geographical Limits: |
Only seen in the Keisley area, Cross Fell Inlier, Cumbria. |
| Parent Unit: |
Dent Group (DNT)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Keisley Quarry, about 300 m east of Keisley, Cumbria. Owen and Rushton, 1999. |
| Reference(s): |
| 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.) 131 pp. |
| 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. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E031
|
