The BGS Lexicon of Named Rock Units — Result Details

Scaleber Quarry Limestone Member

Computer Code: SQLM Preferred Map Code: notEntered
Status Code: Full
Age range: Holkerian Substage (CQ) — Holkerian Substage (CQ)
Lithological Description: Well-bedded, thin and thick beds of mid and mid dark grey, fine- to coarse-grained limestone, with minor mudstone beds. Bioclastic packstones characterize the lower part of the Member, passing up to packstones and grainstones. Bands and nodules of black chert occur locally in the lower part of the Member. The member contains an abundant macrofauna, characterized by cerioid and fasciculate lithostrotionids.
Definition of Lower Boundary: The base is taken where grey limestone of the Scaleber Quarry Limestone Member overlies dark grey limestone and mudstones of the Scaleber Force Limestone Member. This boundary is typically gradational and for convenience the base is taken at top of highest prominent mudstone.
Definition of Upper Boundary: The top of the Member is drawn at the conformable, gradational and slightly diachronous upward passage from mid dark-grey limestone of the Scaleber Quarry Limestone Member to the pale grey limestone of the Cove Limestone Member.
Thickness: To 134m thick at the type locality, decreasing to 29m at outcrop at Kilnsey Crag.
Geographical Limits: Series of inliers in the southern part of the Askrigg Block, North Yorkshire, including Kilnsey [SD 97 68], Langcliffe [SD 82 65] and Austwick [SD 77 68].
Parent Unit: Kilnsey Formation (KLSL)
Previous Name(s): Kilnsey Limestone (-1626)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Cominco Borehole S2 (SD86SW/6) located at Low Barn, Stockdale Beck. The entire thickness of the Member (134m) was proved from ?363.9m (base) to ?224.2m (top). Arthurton et al. 1988. 
Type Section  Kilnsey Crag provides at outcrop the full thickness (29m) of Member, including top and base in a cliff section. Arthurton et al. 1988. 
Reference(s):
Arthurton, R S, Johnson, E W and Mundy, D J C. 1988. Geology of the country around Settle. Memoir of the British Geological Survey, Sheet 60 (England and Wales). 
Hudson, R G S. 1930. The Carboniferous of the Craven Reef Belt; and the Namurian unconformity at Scaleber, near Settle. Proceedings of the Geologists' Association, Vol.41, 290-322. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E060