The BGS Lexicon of Named Rock Units — Result Details

Warley Wise Grit

Computer Code: WWG Preferred Map Code: WWG
Status Code: Index Level
Age range: Pendleian Substage (CE) — Pendleian Substage (CE)
Lithological Description: A medium to thickly bedded, brownish grey, medium- to coarse-grained, sandstone and pebbly sandstone, which is massive to cross-bedded; beds of siltstone occur throughout and coals are locally developed.The unit is interpreted as a delta top sandstone.
Definition of Lower Boundary: Sharp upward change in a conformable succession from predominantly grey mudstone to sandstone - base of first pebbly sandstone bed above the Pendle Grit Member.
Definition of Upper Boundary: Sharp upward change in a conformable succession from sandstone to predominantly mudstone - top of last coarse or pebbly sandstone below the synsedimentary slumped siltstones and sandstones of the Roeburndale Member and the Cravenoceras cowlingense Marine Band.
Thickness: 40 to165m
Geographical Limits: Yorkshire and Lancashire Pennines south of the Craven Fault System and north of a line from Rochdale to Leeds.
Parent Unit: Pendleton Formation (PENDL)
Previous Name(s): Almscliff Grit [Obsolete Name And Code: Use WWG] (ALMG)
Alternative Name(s): Grassington Grit
Brennarnd Grit
Upper Howgate Edge Grit
Stratotypes:
Type Section  Section in Stone Head Beck to the east of Warly Wise Farm; complete, almost continuous section with base seen and overlying Cravenoceras cowlingense Marine Band. Earp and others, 1961. 
Reference Section  Section in River Ribble at Sales Wheel exposes up to 117m of sandstone from upper part of unit with top and overlying Cravenoceras cowlingense Marine Band seen. Aitkenhead and others 1972. 
Reference(s):
Earp, J R, Magraw, D, Poole, E G, Land, D H and Whiteman, A J, 1961. Geology of the country around Clitheroe and Nelson. Memoir of the Geological Survey of Great Britain, Sheet.68, England and Wales, pp.346. 
Bray, A. 1927. The Carboniferous sequence between Lothersdale and Cowling (Colne). Journal of the Manchester Geological Association, Vol.1, 44-57. 
Aitkenhead, N, Barclay, W J, Brandon, A, Chadwick, R A, Chisholm, J I, Cooper, A H and Johnson, E W. 2002. British Regional Geology: the Pennines and adjacent areas (fourth edition) (British Geological Survey, Nottingham). 
Aitkenhead, N, Bridge, D M, Riley, N J and Kimbell, S F. 1992. Geology of the country around Garstang. Memoir of the British Geological Survey, Sheet 67 (England and Wales) 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E068 E067 E070 E076 E060 E069