The BGS Lexicon of Named Rock Units — Result Details

Kilnsey Formation

Computer Code: KLSL Preferred Map Code: notEntered
Status Code: Full
Age range: Arundian Substage (CJ) — Holkerian Substage (CQ)
Lithological Description: Dark to medium light grey, thick to thin-bedded, bioclastic limestone with mudstone beds and partings..
Definition of Lower Boundary: Drawn at the base of dark grey limestones with mudstone partings of the Scaleber Force Limestone Member (of the Kilnsey Formation) where it rests sharply and conformably on paler grainstone of the Chapel House Limestone Formation.
Definition of Upper Boundary: Drawn at the conformable upward passage from mid dark-grey limestone of the Scalebar Quarry Limestone Member (of the Kilnsey Formation) into pale grey limestone of the Cove Limestone Member, Malham Formation.
Thickness: Up to 224m in boreholes south of the Middle Craven Fault. The Formation thins rapidly northwards to 53m in the Kilnsey area.
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: Great Scar Limestone Group (GSCL)
Previous Name(s): Kilnsey Limestone (-1626)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Kilnsey Crag, Nr. Malham, North Yorkshire. 
Reference Section  Chapel House Borehole, Nr. Kilnsey, North Yorkshire. 
Reference Section  Stockdale Farm (Cominco S7) Borehole, near Settle, North Yorkshire. The formation is present from 120.1m (base) to 15.2m (top) depth, and comprises 61.6m of the Scaleber Force Limestone Member and 43.2m of the Scaleber Quarry Limestone Member. Authurton et al. 1988 
Partial Type Section  Kilnsey Crag near Malham, North Yorkshire exposes 8m of the upper part of the Scaleber Force Limestone Member and 29m of the overlying Scaleber Quarry Limestone Member. Authurton et al. 1988. 
Reference(s):
Mundy, D J C and Arthurton, R S, 1980. Field Meetings: Settle and Flasby. Proceedings of the Yorkshire Geological Society, Vol.43, 32-36. 
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:
E060