| Computer Code: |
RES |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Courceyan Substage (CF)
— Courceyan Substage (CF) |
| Lithological Description: |
Pebbly sandstone, conglomerates especially near the base, fine- to medium- sandstone, siltstone and mudstone, typically red-brown with minor green mottling.The formation is broadly upward fining, with individual beds internally upward fining too, the cycles average 6.7 m thick, and diminish in thickness upwards. Carbonate concretions of calcrete may be present at the top of some cycles. |
| Definition of Lower Boundary: |
Not seen, but probably unconformable upon pre-Carboniferous strata. |
| Definition of Upper Boundary: |
Conformable passage, with the base of the overlying Rue Hill Dolomite Formation taken at the base of the lowest dolostone bed containing bioclasts, and underlain by reddish-brown pebbly sandstone of the Redhouse Sandstone Formation. |
| Thickness: |
Measured as 170.3 m thick in the Caldon Low Borehole, although the base is not proved. |
| Geographical Limits: |
Off-shelf to the Derbyshire High and Staffordshire Shelf, in the Ashbourne and Cheadle District, but in the subsurface only. |
| Parent Unit: |
Not Applicable (-)
|
| Previous Name(s): |
Redhouse Sandstones [Obsolete Name and Code: Use RES]
(-4295)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Caldon Low Borehole (SK04NE/36), between 365.07 and 535.37 m. |
| Reference(s): |
| Waters, C N, Smith, K, Hopson, P M, Wilson, D, Bridge, D M, Carney, J N, Cooper, A H, Crofts, R G, Ellison, R A, Mathers, S J, Moorlock, B S P, Scrivener, R C, McMillan, A A, Ambrose, K, Barclay, W J, and Barron, A J M. 2007. Stratigraphical Chart of the United Kingdom: Southern Britain. British Geological Survey, 1 poster. |
| Welsh, A and Owens, B. 1983. Early Dinantian miospore assemblages from the Caldon Low Borehole, Staffordshire, England. Pollen Spores, vol. 25, 253-264. |
| Aitkenhead, N, and Chisholm, J I. 1982. A standard nomenclature for the Dinantian formations of the Peak District of Derbshire and Staffordshire. Report of the Institute of Geological Sciences, No. 82/8. |
| Chisholm, J I, Charsley, T J and Aitkenhead, N. 1988. Geology of the country around Ashbourne and Cheadle. Memoir of the British Geological Survey, Sheet 124 (England and Wales). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E124
|
