The BGS Lexicon of Named Rock Units — Result Details

Leadhills Supergroup

Computer Code: LHG Preferred Map Code: LHG
Status Code: Pending Upgrade
Age range: Abereiddian Stage (O2) — Ashgill Series (OA)
Lithological Description: Greywackes, shales, siltstones and mudstones with conglomerates.
Definition of Lower Boundary: Lying between the Glen App and Southern Upland Faults in the north and the Kingledores Fault in the south.
Definition of Upper Boundary: Lying between the Glen App and Southern Upland Faults in the north and the Kingledores Fault in the south.
Thickness: Not defined.
Geographical Limits: The Southern Uplands of Scotalns, and by extension into Longford-Down in Ireland.
Parent Unit: Not Applicable (-)
Previous Name(s): Leadhills Group (*806)
Alternative Name(s): Leadhills Group
Stratotypes:
Type Area  Has its fullest development in the area bounded in the NW by the Southern Upland Fault, in the SE by the Orlock Bridge Fault, in the SW by the A713 road between Dalmellington and Dalry, and in the NE by the River Nith between New Cumnock and Thornhill. 
Reference(s):
Cameron, I B, Stone, P and Smellie, J, 1986. Geology of the Country around Girvan. Explanation of 1:50 000 sheet. British Geological Survey, Sheet 7, Scotland. 
Floyd, J D, 1996. Lithostratigraphy of the Ordovician rocks in the Southern Uplands: Crawford Group, Moffat Shale Group, Leadhills Supergroup. Transactions of the Royal Society of Edinburgh: Earth Sciences, Vol.86, 153-165. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S007 S016 S025 S023 S024 S033 S033