The BGS Lexicon of Named Rock Units — Result Details

Knock Pike Tuff Formation

Computer Code: KNPK Preferred Map Code: KnPk
Status Code: Full
Age range: Caradoc Series (O4) — Caradoc Series (O4)
Lithological Description: Pale grey, densely welded silicic tuff and lapilli-tuff with a very prominent parataxitic texture; there may be some lava.
Definition of Lower Boundary: Taken at the base of densely welded rhyolitic tuff, resting on a bedded, mixed sequence of volcaniclastic sandstone and rhyolitic tuff of the Studgill Tuff Formation.
Definition of Upper Boundary: Defined by the base of the overlying mixed succession of silicic tuff and volcaniclastic sandstone of the Harthwaite Tuff Formation.
Thickness: About 500m
Geographical Limits: Restricted to the Cross Fell Inlier, Cumbria.
Parent Unit: Borrowdale Volcanic Group (BVG)
Previous Name(s): Knock Pike Formation (-1629)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Partial Type Section  Roadstone Quarry, NE side of Knock Pike Burgess and Holliday (1979) 
Reference(s):
Burgess, I C and Holliday, D W. 1979. Geology of the country around Brough-under-Stainmore. Memoir for 1:50 000 geological sheet 31 and parts of sheets 25 and 30. Geological Survey of Great Britain (England and Wales). [London: HMSO.] 131pp. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E030 E024 E031