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
Stratotypes:
Reference Section  Elland by-pass. Sections recorded by Bristow and Myers (1989). 
Reference Section  Ratten Clough, 5km north west of Todmorden (many other sections recorded in the Rossendale Anticline (Sheet 76) Memoir. 
Type Area  Central Pennines: see Rossendale Anticline (76) Memoir. 
Reference(s):
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