The BGS Lexicon of Named Rock Units — Result Details

Windermere Supergroup

Computer Code: WIN Preferred Map Code: Win
Status Code: Pending Upgrade
Age range: Llandovery Epoch (SL) — Pridoli Epoch (SO)
Lithological Description: A sequence of silty mudstones and siltstones with units of sandstone.
Definition of Lower Boundary: At base of black shales of the Skelgill Beds, overlying the Ashgill Shale Formation.
Definition of Upper Boundary: At the unconformable base of the overlying Carboniferous strata.
Thickness: c.4500m
Geographical Limits: Not defined.
Parent Unit: Not Applicable (-)
Previous Name(s): Windermere Group (-2491)
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
Lawrence, D J D, Webb, B C, Young, B and White, D E. 1986. The geology of the Late Ordovician and Silurian rocks (Windermere Group) in the area around Kentmere and Crook. Includes map, 1:25,000 series, Parts of Sheets NY40 and SD49 Kentmere and Crook, Solid and Drift Geology. Report of the British Geological Survey, 18/5. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E038 E023 E040 E048 E049 E039