The BGS Lexicon of Named Rock Units — Result Details

Lower Hartfell Shale Formation

Computer Code: LHBS Preferred Map Code: LHBS
Status Code: Full
Age range: Caradoc Series (O4) — Ashgill Series (OA)
Lithological Description: Black hemipelagic mudstone.
Definition of Lower Boundary: Conformable on Glenkiln Shale Formation.
Definition of Upper Boundary: Conformably overlain by Upper Hartfell Shale Formation.
Thickness: 22m
Geographical Limits: Southern Uplands of Scotland and Longford Down Inlier, Northern Ireland.
Parent Unit: Moffat Shale Group (MFS)
Previous Name(s): Lower Hartfell Shales (-1025)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Hartfell Score, Annandale, Dumfriesshire Williams, 1994 
Reference(s):
Floyd, J D, 2001. The Southern Uolands Terrane: a stratigraphical review. Transactions of the Royal Society of Edinburgh: Earth Sciences, Vol.91, 349-362. 
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. 
Williams, S H, 1994. Revision and definition of the C. wilsoni Zone (middle Ordovician) of southern Scotland. Transactions of the Royal Society of Edinburgh: Earth Sciences, Vol.85, 143-157. 
Lapworth, C, 1877. The Moffat Series. Quarterly Journal of the Geological Society of London, Vol.34, 240-346. 
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.) 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S017 S024 S015 S015