The BGS Lexicon of Named Rock Units — Result Details

Pavey Ark Breccia Member

Computer Code: PAV Preferred Map Code: Pav
Status Code: Full
Age range: Caradoc Series (O4) — Caradoc Series (O4)
Lithological Description: Pebbly sandstone and volcaniclastic breccia; brown weathered, massive to poorly bedded; in the type area contains abundant ragged, vesicular andesite spatter.
Definition of Lower Boundary: Base of the unit of pebbly sandstone and volcaniclastic breccia. Mildly unconformable on volcaniclastic sedimentary rocks within the Seathwaite Fell Sandstone Formation.
Definition of Upper Boundary: Generally overlain by fine-grained sandstone and siltstone within the Seathwaite Fell Sandstone Formation.
Thickness: 0 - 200m
Geographical Limits: Langdale Pikes (NY 280 075) to Bell Crags (NY 298 142), Cumbria.
Parent Unit: Seathwaite Fell Sandstone Formation (SET)
Previous Name(s): Pavey Ark Member (-440)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Pavey Ark. 
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:
E038 E029