The BGS Lexicon of Named Rock Units — Result Details

Upper Hartfell Shale Formation

Computer Code: UHBS Preferred Map Code: UHBS
Status Code: Full
Age range: Ashgill Series (OA) — Ashgill Series (OA)
Lithological Description: Pale grey mudstone with rare laminae of black hemipelagic mudstone.
Definition of Lower Boundary: Conformable on Lower Hartfell Shale Formation.
Definition of Upper Boundary: Conformably overlain by Birkhill Shale Formation
Thickness: 28m
Geographical Limits: Southern Uplands of Scotland and Longford Down Inlier, Northern Ireland.
Parent Unit: Moffat Shale Group (MFS)
Previous Name(s): Upper Hartfell Shales (-4951)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Dobb's Linn, Moffatdale, Dumfriesshire Webb et al, 1993 
Reference(s):
Lapworth, C, 1877. The Moffat Series. Quarterly Journal of the Geological Society of London, Vol.34, 240-346. 
Floyd, J D, 2001. The Southern Uolands Terrane: a stratigraphical review. Transactions of the Royal Society of Edinburgh: Earth Sciences, Vol.91, 349-362. 
Webb, B C, Rushton, A W A and White, D E. 1993. Moffatdale and the upper Ettrick valley. Description of the solid geology of parts of 1:25000 sheets NT10, 11, 20 and 21. Classical Areas of British Geology. (London: British Geological Survey, HMSO.) 
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:
S017 S034 S015 S015