| Computer Code: |
RR |
Preferred Map Code: |
RR |
| Status Code: |
Index Level |
| Age range: |
Yeadonian Substage (CY)
— Yeadonian Substage (CY) |
| Lithological Description: |
Coarse-grained feldspathic sandstone, cross-bedded. |
| Definition of Lower Boundary: |
The base of the Rough Rock is sharp and erosional, in part undertlain by mudstones with the Gastrioceras cumbriense Marine Band; locally present are fine-grained sandstones (Rough Rock Flags, Upper Haslingden Flags). |
| Definition of Upper Boundary: |
The sandstone of the Rough Rock is commonly overlain sharply by a seatearth clay (Pot Clay), thin coal (Pot Clay Coal) and dark grey mudstones with the Gastrioceras subcrenatum Marine Band. |
| Thickness: |
To about 30m |
| Geographical Limits: |
Central Pennines. |
| Parent Unit: |
Rossendale Formation (ROSSE)
|
| Previous Name(s): |
Rough Rock Formation [Obsolete Name and Code: Use RR]
(-1795)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
Ratten Clough, 5km north west of Todmorden (many other sections recorded in the Rossendale Anticline (Sheet 76) Memoir. |
| Reference Section |
Elland by-pass. Sections recorded by Bristow and Myers (1989). |
| Type Area |
Central Pennines: see Rossendale Anticline (76) Memoir. |
| Reference(s): |
| Wright, W B, Sherlock, R L, Wray, D A, Lloyd, W and Tonks, L H, 1927. The Geology of the Rossendale Anticline. Memoir of the Geological Survey, England. England and Wales Sheet 76. |
| Bristow, C S, and Myers, K J. 1989. Detailed sedimentology and gamma-ray log characteristics of a Namurian deltaic succession: sedimentology and facies analysis. 75-80 in Deltas: sites and traps for Fossil Fuels. Whateley, M K G, and Pickering, K T (editors). Geological Society Special Publication No. 41. |
| Bristow, C S. 1987. Controls on the sedimentation of the Rough Rock Group (Namurian) from the Pennine Basin of northern England. 114-131 in Sedimentation in a synorogenic basin. Besley, B M, and Kelling, G (editors). (Blackie: Glasgow and London.) |
| Whittard, W F and Simpson, S, 1960. Upper Carboniferous of England, Wales and Scotland, "in" Whittard, W F and Simpson, S. Lexique Stratigraphique International, part 3a VIII, Vol.18. Centre National de la Recherche Scientifique, Paris. |
| Waters, C N, Waters, R A, Barclay, W J, and Davies, J R. 2009. Lithostratigraphical framework for Carboniferous successions of Southern Great Britain (Onshore). British Geological Survey Research Report, RR/09/01. 184pp. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E060
E069
E070
E086
E085
E062
E112
E123
E084
E100
E098
E068
E087
E075
E077
E125
E099
E110
E111
E059
E126
E078
E142
E141
|
