The BGS Lexicon of Named Rock Units — Result Details

Bannisdale Formation

Computer Code: BND Preferred Map Code: BND
Status Code: Full
Age range: Gorstian Age (SG) — Ludfordian Age (SD)
Lithological Description: Silty mudstone with subordinate siltstone and sandstone.
Definition of Lower Boundary: Conformably overlies the Coniston Group (Yewbank Formation).
Definition of Upper Boundary: Conformably overlain by the Underbarrow Formation.
Thickness: c.3000m
Geographical Limits: Southern Lake District and Northwest Pennines.
Parent Unit: Kendal Group (KNDL)
Previous Name(s): Bannisdale Slates [Obsolete Name And Code: Use BND] (BASL)
Alternative Name(s): none recorded or not applicable
Reference Section  East of Borwick Fold to Land's Lot. 
Type Area  Reston Scar. 
Moseley F. 1984. Lower Palaeozoic lithostratigraphical classification in the English Lake District. Geological Journal, Vol. 19, p. 239-247. 
Marr J E. 1892. On the Wenlock and Ludlow strata of the Lake District. Geological Magazine, Vol. 9, p 534-541. 
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. 
Kneller, B C. 1990. The Wenlock rocks of sheet 38 (Ambleside). British Geological Survey Technical Report, WA/90/64 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E039 E038 E040 E048