The BGS Lexicon of Named Rock Units — Result Details

Studfold Sandstone Member

Computer Code: SDS Preferred Map Code: SdS
Status Code: Full
Age range: Gorstian Age (SG) — Gorstian Age (SG)
Lithological Description: Poorly sorted arkosic fine-grained sandstone, mostly thickly bedded.
Definition of Lower Boundary: Taken at the sharp base of thick-bedded sandstone within the sequence of laminated sandy siltstones of the Horton Formation.
Definition of Upper Boundary: Defined by the change to dominantly laminated siltstones within the main part of the Horton Formation.
Thickness: 40-80m
Geographical Limits: Restricted to the Craven Inliers, North Yorkshire.
Parent Unit: Horton Formation (HNF)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Tongue Gill on the southern limit of the Studrigg-Studfold Syncline 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). 
Kneller, B C, Scott R W, Soper N J, Johnson E W and Allen P M, 1994. Lithostratigraphy of the Windermere Supergroup, Northern England. Geological Journal, Vol. 29, 219-240. 
McCabe, P J. 1972. The Wenlock and Lower Ludlow strata of the Austwick and Horton-in-Ribblesdale Inlier of north west Yorkshire. Proceedings of the Yorkshire Geological Society, Vol.39, 167-174. 
King, W B R and Wilcockson, W H, 1934. The Lower Palaeozoic rocks of Austwick and Horton-in-Ribblesdale, Yorkshire. Quarterly Journal of the Geological Society of London, Vol.90, 7-31. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E060