Computer Code: |
KNL |
Preferred Map Code: |
KNL |
Status Code: |
Full |
Age range: |
Asbian Substage (CR)
— Asbian Substage (CR) |
Lithological Description: |
Pale grey, scar-forming limestones, mostly thick-bedded biosparites and biopelsparites commonly pseudobrecciated, and probable thin siliciclastic bed, not exposed at type section. |
Definition of Lower Boundary: |
Underlying Potts Beck Limestone comprises interbedded pale grey limestones (of those in Knipe Scar Limestone), dark grey limestones and sandstones (up to 3 metres thick). |
Definition of Upper Boundary: |
Overlying beds are a variable sandstone/siltstone/mudstone unit between Knipe Scar and Robinson Limestones. |
Thickness: |
61m seen, but top 16 metres of formation not present - but exposed in sections on Limestone Scars within 1 km to east and can be seen to comprise comparable thick-bedded pale grey limestones. Thickness fairly constant along outcrop on NY60NW and NY60NE with slight eastward increase up to c.90 metres on Little Asby Scar. |
Geographical Limits: |
Not defined. |
Parent Unit: |
Great Scar Limestone Group (GSCL)
|
Previous Name(s): |
none recorded or not applicable
|
Alternative Name(s): |
none recorded or not applicable
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Stratotypes: |
Type Area |
Great Asby Scar, 500 metres - 1000 metres north of Sunbiggin, near Orton, Cumbria, Sheet 39. |
Reference(s): |
Pattison, J. 1990. Geology of the Orton and Sunbiggin Tarn districts. Geological notes and local details for 1:10,000 Sheets NY60NW and NY60NE and part of 1:50,000 Sheets 30 (Appleby), 31 (Brough), 39 (Kendal) and 40 (Kirkby Stephen). British Geological Survey Onshore Geology Series, Technical Report, WA/90/12. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
E039
E040
E030
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