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 [Obsolete Name and Code: Use KKB]
(-4728)
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Type Area |
Outcrop south west of High Haume Farm, Dalton in Furness, Cumbria. |
Reference(s): |
Johnson, E W, Soper, N J, Burgess, I C, Ball, D F, Beddoe-Stephens, B, Carruthers, R M, Fortey, N J, Hirons, S, Merritt, J W, Millward, D, Roberts, B, Walker, A B and Young, B. 2001. Geology of the country around Ulverston. Memoir of the British Geological Survey, England and Wales, Sheet 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. |
Rose, W C C. 1977. Geology and Hematite deposits of South Cumbria. Economic Memoir for 1:50,000 Sheet 58 and southern part of Sheet 48. Memoir of the geological Survey of Great Britain. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
E038
E048
|