The BGS Lexicon of Named Rock Units — Result Details

Stickle Pike Tuff Member

Computer Code: STPI Preferred Map Code: StPi
Status Code: Full
Age range: Caradoc Series (O4) — Caradoc Series (O4)
Lithological Description: Rhyolitic lapilli-tuff, pale-weathered, eutaxitic to parataxitic.
Definition of Lower Boundary: At base of rhyolitic lapilli-tuff in the Lickle Tuff Formation that usually overlies volcaniclastic sandstone and locally rests on the Paddy End Tuff Member.
Definition of Upper Boundary: Base of overlying Caw Sandstone Formation (volcaniclastic breccia and sandstone) or, locally, the Lag Bank Tuff Formation (dacitic lapilli tuff).
Thickness: 20 - 100m
Geographical Limits: Within the Ulpha Basin southeast of the River Duddon. Turner Hall (SD 230 960) to Great Stickle (SD 211 915) and Lickle Valley (SD 240 920), Cumbria.
Parent Unit: Lickle Tuff Formation (LICK)
Previous Name(s): Lickle Rhyolites (-1657)
Stickle Pike Member (-1848)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Dunnerdale Fells. Between Yew Pike (SD 204 925) and Stickle Tarn (SD 213 928) and from Tarn Hill (SD 208 919) to Great Stickle (SD 2117 9159). 
Reference(s):
Mitchell, G H, 1956. (Undivided Lickle Rhyolites). The Borrowdale Volcanic Series of the Dunnerdale Fells, Lancashire. Liverpool and Manchester Geological Journal, Vol.1, p.428-449. 
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. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E038