| Computer Code: |
FCS |
Preferred Map Code: |
FCS |
| Status Code: |
Full |
| Age range: |
Marsdenian Substage (CZ)
— Marsdenian Substage (CZ) |
| Lithological Description: |
Sandstone, pale brown to pink, coarse-grained, thickly bedded and massive, feldspathic, with ferruginous concretions and scattered mudstone clasts, and subordinate mudstone beds. |
| Definition of Lower Boundary: |
The lower boundary is taken at the base of a thickly bedded sandstone overlying grey mudstone of undivided Millstone Grit Group in the Upper Hulme Stream Section (SK06SW/14); the precise nature of the boundary is not recorded. |
| Definition of Upper Boundary: |
The upper boundary is taken at the base of the first mudstone-dominated succession of undivided Millstone Grit Group overlying the Five Clouds Sandstones; the precise nature of the boundary is not recorded. |
| Thickness: |
At least 81.6m (the total thickness has not been proven; 81.6m is the maximum proving for the unit). |
| Geographical Limits: |
Danesridge, Staffordshire [SJ 96 65] to Stanley Moor, Derbyshire [SK 04 71]. |
| Parent Unit: |
Millstone Grit Group [See Also MIGR] (MG)
|
| Previous Name(s): |
Five Clouds Grit [Obsolete Name and Code: Use FCS]
(-4040)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Five Clouds escarpment, Meerbrook, Staffordshire; natural cliff section exposing a partial section of the unit (no further details available). Aitkenhead et al., 1985. |
| Partial Type Section |
Stream section at Upper Hulme (Staffordshire) exposes 81.6m partial section of the unit (top not proven). Section has been logged and lodged as borehole record SK06SW/14. Aitkenhead et al., 1985 |
| Reference(s): |
| Aitkenhead, N, Chisholm, J I, and Stevenson, I P. 1985. Geology of the country around Buxton, Leek and Bakewell. Memoir of the British Geological Survey, England and Wales Sheet 111. |
| Jones, C M, 1980. Deltaic sedimentation in the Roaches Grit and associated sediments (Namurian R2b) in the south-west Pennines. Proceedings of the Yorkshire Geological Society Vol.43, Pt.1, 39-67. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E111
|
