The BGS Lexicon of Named Rock Units — Result Details

Rough Rock

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 (-1795)
Alternative Name(s): none recorded or not applicable
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. 
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. 
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, 1987. Controls on the sedimentation of the Rough Rock Group (Namurian) from the Pennine Basin of northern England. 114-131 "in" Besley, B M and Kelling, G. Sedimentation in a synorogenic basin. [Blackie: Glasgow and London.] 
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" Whateley, M K G and Pickering, K T. Deltas: sites and traps for Fossil Fuels, Geological Society Special Publication No.41. 
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