The BGS Lexicon of Named Rock Units — Result Details

Bowland High Group

Computer Code: BOHI Preferred Map Code: BOHI
Status Code: Full
Age range: Courceyan Substage (CF) — Chadian Substage (CI)
Lithological Description: Pale to dark grey, packstone and wackestone with subordinate grainstones, partings and thin beds of calcareous mudstone and calcareous siltstone. Mudmound reef (Waulsortian) limestones are present in the upper part of the group.
Definition of Lower Boundary: Not exposed or proved
Definition of Upper Boundary: The uppermost limestone of the Bowland High Group, overlain by mudstones of the Hodder Mudstone Formation, marked by regional unconformity.
Thickness: Up to 2340 m thickness known (base not proved).
Geographical Limits: The Craven Basin between Clitheroe and Skipton.
Parent Unit: Carboniferous Limestone Supergroup (CL)
Previous Name(s): IN PART: CHATBURN LIMESTONE GROUP
IN PART: WORSTON SHALE GROUP
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Clitheroe, Lancashire, -see component Chatburn Limestone and Clitheroe Limestone formations for reference sections. 
Reference(s):
Waters, C N, Barclay, W J, Davies, J R and Waters, R A. In press. Stratigraphical framework for Carboniferous successions of Southern Great Britain (Onshore). British Geological Survey Research Report, RR/05/06. 
Whittard, W F and Simpson, S. 1960. Lower Carboniferous. 54-55 in Whittard, W F and Simpson, S (editors), Lexique Stratigraphique International, Part 3a VII, Vol.1. 
Earp, J R and others, 1961. Geology of the country around Clitheroe and Nelson. Geological Survey of Great Britain Memoir, Sheet 68. 
Fewtrell, M D and Smith, D G, 1980. Revision of the Dinantian stratigraphy of the Craven Basin, N. England. Geological Magazine, Vol.117, p.37-49. 
Lees, A and Miller, J. 1985. Facies variation in Waulsortian buildups, Part 2; mid-Dinantian buildups from Europe and North America. Geological Journal, Vol.20, 134-159. 
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. 
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. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E059 E060 E061 E067 E068 E069