The BGS Lexicon of Named Rock Units — Result Details

Wet Sleddale Andesite Formation

Computer Code: WETS Preferred Map Code: WetS
Status Code: Full
Age range: Caradoc Series (O4) — Caradoc Series (O4)
Lithological Description: Andesite and basaltic andesite sheets with thin intercalations of bedded volcaniclastic rocks.
Definition of Lower Boundary: Taken at the base of the lowest andesite sheet overlying the bedded volcaniclastic sandstone succession of the Seathwaite Fell Sandstone Formatrion.
Definition of Upper Boundary: Defined by the base of the overlying Lincomb Tarns Tuff Formation.
Thickness: Possibly up to 1200m, much faulted.
Geographical Limits: Longsleddale to Wet Sleddale, eastern Lake District, Cumbria.
Parent Unit: Borrowdale Volcanic Group (BVG)
Previous Name(s): Wet Sleddale Formation (-2526)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Fellside from Tod Crags south to little Saddle Crag, Shap Fells, Cumbria. 
Reference(s):
Millward, D, 2002. Geology of the area between Haweswater and Shap. British Geological Survey Research Report RR/02/02 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E039 E030