| Computer Code: |
RHO |
Preferred Map Code: |
RHL |
| Status Code: |
Full |
| Age range: |
Arundian Substage (CJ)
— Arundian Substage (CJ) |
| Lithological Description: |
Carbonate bioclastic, intraclastic and peloidid grainstones, coarse-grained and virtually structureless following bioturbation. |
| Definition of Lower Boundary: |
Taken at base of Algal Band in type locality and elsewhere; otherwise at upward change from fine-grained oolites/grainstones/carbonate mudstones of Martin Limestone to coarse-grained unbedded grainstone. |
| Definition of Upper Boundary: |
Base of overlying Dalton Formation. |
| Thickness: |
20 to 60m |
| Geographical Limits: |
South Cumbria. |
| Parent Unit: |
Great Scar Limestone Group (GSCL)
|
| Previous Name(s): |
Red Hill Oolite [Obsolete Name and Code: Use RHO]
(-4860)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Red Hills Quarry, near Millom. (now partly filled in). |
| Reference Section |
Dunnerholme, Furness. (south-east end). |
| Reference Section |
Meathop Quarry, Grange-over-Sands. |
| Reference(s): |
| Dunham, K C and Rose, W C C. 1941. Geology of the iron-ore field of south Cumberland and Furness. Geological Survey of Great Britain, Wartime Pamphlet, No.16. |
| Nicholas, C. 1968. The stratigraphy and sedimentary petrology of the Lower Carboniferous rocks south west of the Lake District. Unpublished Ph.D. thesis, University of London. |
| 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. |
| 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. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E048
|
