The BGS Lexicon of Named Rock Units — Result Details

Studgill Tuff Formation

Computer Code: SGIL Preferred Map Code: Sgil
Status Code: Full
Age range: Caradoc Series (O4) — Caradoc Series (O4)
Lithological Description: Rhyolitic lapilli-tuff and volcaniclastic sandstone
Definition of Lower Boundary: Lower boundary is nowhere seen becouse of faulting
Definition of Upper Boundary: Defined by the base of the overlying silicic tuff of the Knock Pike Formation
Thickness: About 300m
Geographical Limits: In the Cross Fell Inlier, Cumbria
Parent Unit: Borrowdale Volcanic Group (BVG)
Previous Name(s): Studgill Formation (-3670)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Northeast face of Dufton Pike, Cross Fell Inlier, Cumbria 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:
E024 E031 E030