The BGS Lexicon of Named Rock Units — Result Details

Coplow Limestone Member

Computer Code: COPL Preferred Map Code: notEntered
Status Code: Full
Age range: Chadian Substage (CI) — Chadian Substage (CI)
Lithological Description: Pure, massive and biohermal Waulsortian limestones with surbordinate packstones, grainstones and thin fissile mudstones.
Definition of Lower Boundary: Taken at the base of the lowest Waulsortian limestone, which rests conformably upon fissile mudstones of the "Lower Coplow Shales".
Definition of Upper Boundary: Generally, Waulsortian limestones of the Coplow Limestone Member are overlaain unconformably by mudstones of the Hodder Mudstone Formation. In the Clitheroe Anticline the upper part of the Coplow Limestone Member is present, with Waulsortian limestones overlain conformably by poorly exposed dark grey fissile mudstones and packstones of the 'Upper Coplow Shales'.
Thickness: Up to 300 m thick.
Geographical Limits: The Craven Basin, generally to the south and west of the Bowland High, within the Ashnott and Clitheroe anticlines [SD 74], Slaidburn and Newton [SD 75], Thornley [SD 64] and Whitwell [SD 64] anticlines.
Parent Unit: Clitheroe Limestone Formation (CLL)
Previous Name(s): Coplow Knoll Series [Obsolete Name And Code: Use COPL] (CKS)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Large quarry exposure at Knoll Wood, 1.25 km west-southwest of Newton, displaying 15 m of massive Waulsortian limestone. Aitkinhead et al., 1992. 
Partial Type Section  Coplow Quarry, 1.8 km north-northeast of Clitheroe Castle, base of the member exposured. Riley, 1990. 
Reference Section  Disused quarry at Hall Hill, 0.9km east-southeast of the Whitewell Hotel shows the diachronous base of a Waulsortian limestone with underlying 4 m of thin-bedded packstones and thin shales. Black 1954; Aitkinhead et al., 1992. 
Reference Section  Large quarry exposure at Leagram knott, 2.1 km northeast of Chipping Parish Church. 
Reference(s):
Riley N J. 1990. Stratigraphy of the Worston Shale Group (Dinantian) Craven Basin, north-west England. Proceedings of the Yorkshire Geological Society, Vol. 48, 163-187. 
Miller, J and Grayson, R F. 1972. Origin and structure of the Lower Visean "reef" limestones near Clitheroe, Lancashire. Proceedings of the Yorkshire Geological Society, Vol. 38, 607-638. 
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) 
Parkinson, D, 1926. The faunal succession in the Carboniferous Limestone and Bowland Shales at Clitheroe and Pendle Hill, Lancashire. Quarterly Journal of the Geological Society of London. Volume 82. p.188-249. 
Black, W W. 1954. Diagnostic characters of the Lower Carboniferous knoll-reefs in the north of England. Transactions of the Leeds Geological Association, Vol.6, 262-297 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E067 E068