The BGS Lexicon of Named Rock Units — Result Details

Limekiln Wood Limestone Member

Computer Code: LMKL Preferred Map Code: LmkL
Status Code: Full
Age range: Chadian Substage (CI) — Chadian Substage (CI)
Lithological Description: Packstones, floatstones, grainstones, Waulsortian limestone, limestone-mudstone lithoclast breccias and boulder beds, thin to thick-bedded, interbedded with mudstones, some of which are lithoclastic. Laminated, erosive-based, graded beds occur at the type locality. Crinoidal debris is very conspicuous.
Definition of Lower Boundary: The base is not seen at the type locality. Taken at the base of the succession of lithoclast breccias and boulder beds, packstones, floatstones, grainstones resting unconformably upon mainly pale grey packstones, wackestones and floatstones of the Clitheroe Limestone Formation.
Definition of Upper Boundary: Typically, conformable passage from the succession of lithoclast breccias and boulder beds, packstones, floatstones, grainstones into the overlying dark grey mudstones of the Phynis Mudstone Member.
Thickness: Up to 120 m; maximum thickness at the type locality.
Geographical Limits: Western part of the Craven Basin, including Cow Ark (SD 65 46), Plantation Farm (SD 66 43), Thornley (SD 60 40) and Slaidburn (SD 71 53) anticlines and the southern limb of the Whitewell Anticline (SD 64 47).
Parent Unit: Hodder Mudstone Formation (HOM)
Previous Name(s): Thornley Reef Conglomerate (-1034)
Salthill Cap Beds (-3532)
Alternative Name(s): none recorded or not applicable
Type Section  River Hodder, continuous exposure in the core of the Plantation Farm Anticline at Limekiln Wood, 1.25 to 2.1 km ENE of Doeford Bridge Riley, 1990. 
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. 
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. 
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. 
1:50K maps on which the lithostratigraphical unit is found, and map code used: