The BGS Lexicon of Named Rock Units — Result Details

Cockley Pike Sandstone Member

Computer Code: CPK Preferred Map Code: CPk
Status Code: Full
Age range: Caradoc Series (O4) — Caradoc Series (O4)
Lithological Description: Massive to weakly stratified, coarse- to very coarse-grained volcaniclastic sandstone and breccia
Definition of Lower Boundary: Taken at the mostly very abrupt change from siltstone and very fine-grained sandstone of the Bowfell Links Member to massive very coarse-grained sandstone. Locally there is some interdigitation between the two members.
Definition of Upper Boundary: Defined by the base of the overlying volcaniclastic rocks of the Sprinkling Tarn Member
Thickness: Up to 250m
Geographical Limits: From Thirlmere to Scafell and Langdale, Lake District, Cumbria
Parent Unit: Seathwaite Fell Sandstone Formation (SET)
Previous Name(s): Cockley Pike Member (-2112)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Stake Pass to High Raise, north of Great Langdale, Cumbria Kneller and McConnell, 1993 
Reference(s):
Millward, D, Johnson, E W, Beddoe-Stephens, B, Young, B, Kneller, B C, Lee, M K, Fortey, N J, Allen, P M, Branney, M J, Cooper, D C, Hirons, S, Kokelaar, B P, Marks, R J, McConnell, B J, Merritt, J W, Molyneux, S G, Petterson, M G, Roberts, B, Rundle, C C, Rushton, A W A, Scott, R W, Soper, N J and Stone, P. 2000. Geology of the Ambleside district. Memoir of the British Geological Survey, England and Wales, Sheet 38. 
Kneller B C and McConnell, B J . 1993. The Seathwaite Fell Formation in the central Fells. British Geological Survey Technical Report WA/93/43 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable