The BGS Lexicon of Named Rock Units — Result Details

Sprinkling Tarn Sandstone Member

Computer Code: SPR Preferred Map Code: Spr
Status Code: Full
Age range: Caradoc Series (O4) — Caradoc Series (O4)
Lithological Description: Interbedded coarse-grained pebbly volcaniclastic sandstone, planar bedded and cross-bedded. Includes units of banded andesitic tuff (pyroclastic fall-out deposits) and a succession of silicic tuff and lapilli-tuff (pyroclastic fall-out and density current deposits (the Glaramara Tuff). The facies associated separates this from the underlying Cockley Pike Member
Definition of Lower Boundary: The gradational base is taken at the first appearance of pyroclastic rocks in the sandstone succession
Definition of Upper Boundary: Defined by the base of the overlying silicic pyroclastic rocks of the Lincomb Tarns Formation. The contact varies from conformable and with angular discordance
Thickness: Up to 70m
Geographical Limits: From High Raise to Scafell and Langdale, probably also present in the Tiberthwaite, Coniston area, Lake District, Cumbria
Parent Unit: Seathwaite Fell Sandstone Formation (SET)
Previous Name(s): Sprinkling Tarn Member (-4899)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Sprinkling Tarn, Scafell area, 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