Computer Code: |
SCSH |
Preferred Map Code: |
Stk |
Status Code: |
Index Level |
Age range: |
Llandovery Epoch (SL)
— Llandovery Epoch (SL) |
Lithological Description: |
[Duplicate: use STK]
Includes Skelgill and Browgill Formations as separately defined: dominantly mudstone. |
Definition of Lower Boundary: |
Unconformably overlies the Red Gill Formation of the Dent Group. |
Definition of Upper Boundary: |
Conformably overlain by the Brathay Formation. |
Thickness: |
About 50 metres. |
Geographical Limits: |
Southern Lake District and north-west Pennines. |
Parent Unit: |
none recorded or not applicable
|
Previous Name(s): |
none recorded or not applicable
|
Alternative Name(s): |
Stockdale Group
|
Stratotypes: |
Type Area |
Stockdale Beck. (Reference sections: as defined for component formations, Skelgill and Browgill formations). |
Reference(s): |
Marr, J E and Nicholson, H A, 1888. The Stockdale Shales. Quarterly Journal of the Geological Society of London, Vol.44, p.654-732. |
Moseley F. 1984. Lower Palaeozoic lithostratigraphical classification in the English Lake District. Geological Journal, Vol. 19, p. 239-247. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
E038
|