| Computer Code: |
COSL |
Preferred Map Code: |
CoSL |
| Status Code: |
Full |
| Age range: |
Chadian Substage (CI)
— Chadian Substage (CI) |
| Lithological Description: |
Packstone, dark grey, well bedded, blocky, partly dolomitized and bituminous, with the common occurrence of the coral Dorlodotia. Cyclically interbedded with thin mudstone and siltstone beds. The limestone beds are a fairly constant 0.75m thick. |
| Definition of Lower Boundary: |
At the base of limestone, overlying a 5m unit of interbedded sandstone and mudstone, which forms a topographic depression at the top of the underlying Park Hill Limestone Member. The junction is nowhere exposed now, but the interbedded unit was formerly seen in a road cutting at [NY 7248 0448] during the construction of the Ravenstonedale By-pass, and the junction was recorded in M6 Site Investigation Boreholes at [NY 5885 0998] |
| Definition of Upper Boundary: |
Taken at the base of the overlying Brownber Formation, where there is a change from dark grey cyclically bedded limestone to pale grey ooidal limestone and calcarenite. |
| Thickness: |
40 to 50m |
| Geographical Limits: |
Ravenstonedale, Cumbria between the M6 and the Dent Fault zone, south of Kirkby Stephen. |
| Parent Unit: |
Scandal Beck Limestone Formation (SCBL)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
Slapestones Quarry (disused), Raisbeck, Cumbria. Pattison (1990). |
| Type Section |
Coupland Sike, Ravenstonedale, Cumbria. (Base of section). |
| Partial Type Section |
A stone quarry (working in 2005) on the B6261 road west of Orton village, Cumbria. Pattison (1990). |
| 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: |
|
E040
|
