The BGS Lexicon of Named Rock Units — Result Details

Scaleber Force Limestone Member

Computer Code: SFLM Preferred Map Code: notEntered
Status Code: Full
Age range: Arundian Substage (CJ) — Arundian Substage (CJ)
Lithological Description: Bioturbated, well-bedded, fine- to coarse-grained dark limestones (packstones and subordinate wackestones), generally argillaceous, with common detrital quartz and common mudstone partings and interbeds to 1.8m thick.
Definition of Lower Boundary: Base of Scaleber Force Limestone Member is drawn where the dark limestones of the Member rest sharply and conformably on paler grainstone of the Chapel House Limestone Formation.
Definition of Upper Boundary: The top is taken where the dark grey limestones of the Scaleber Force Limestone Member are overlain by the mid dark grey limestone of the Scaleber Quarry Limestone Member.
Thickness: North of Middle Craven Fault the Member ranges from 22m to 58m thick. South of Middle Craven Fault the Member is 61.6m thick at the type locality (Stockdale Farm (Cominco S7) Borehole).
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-With-Mudstone (-1174)
Alternative Name(s): none recorded or not applicable
Type Section  Stockdale Farm (Cominco S7) Borehole, near Settle, North Yorkshire, SD86SE/6, which includes the full thickness of the Member between 120.1m (base) and 58.5m (top) depth. Arthurton et al. 1988. 
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. 
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). 
1:50K maps on which the lithostratigraphical unit is found, and map code used: