The BGS Lexicon of Named Rock Units — Result Details

Kirkley Bank Formation

Computer Code: KKB Preferred Map Code: KKB
Status Code: Full
Age range: Cautleyan Stage (OU) — Cautleyan Stage (OU)
Lithological Description: Predominantly calcareous siltstone and calcareous mudstone, with nodules, beds and members of mostly impure limestone.
Definition of Lower Boundary: Base of the calcareous siltstone succession or volcanogenic sedimentary succession (Low Scales Beck Member) that rests directly on the underlying Borrowdale Volcanic Group succession.
Definition of Upper Boundary: Top of calcareous siltstone succession that is succeeded by either nodular bedded, micritic limestone of the Broughton Moor Formation or rhyolitic tuff that forms the High Haume Volcanic Formation.
Thickness: 120-150m (Rose and Dunham, 1977 - see bibliography)
Geographical Limits: Low Furness and Lake District, Windermere Supergroup outcrop, Cumbria.
Parent Unit: Dent Group (DNT)
Previous Name(s): HIGH HAUME MUDSTONE
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Outcrop south west of High Haume Farm, Dalton in Furness, Cumbria. 
Reference(s):
Rose, W C C and Dunham, K C, 1977. Geology and hematite deposits of South Cumbria. Economic Memoir of the British Geological Survey, Sheet 58, Part 48. 
Kneller, B C, Scott R W, Soper N J, Johnson E W and Allen P M, 1994. Lithostratigraphy of the Windermere Supergroup, Northern England. Geological Journal, Vol. 29, 219-240. 
Soper, N J, 1994. The Lower Palaeozoic rocks of 1:10,000 sheets SD28SW, SD27NW and SD27NE, Low Furness, Cumbria, British Geological Survey Technical Report WA/94/61. 
Johnson, E W, Soper, N J and Burgess, I C, 2001. Geology of the country around Ulverston. Memoir of the British Geological Survey, Sheet 48. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E038 E048