The BGS Lexicon of Named Rock Units — Result Details

Eskdalemuir Formation

Computer Code: EKM Preferred Map Code: EKM
Status Code: Full
Age range: Llandovery Epoch (SL) — Llandovery Epoch (SL)
Lithological Description: Sandstone, typically fine- to medium-grained but ranging from very fine- to coarse-grained. Generally medium- to thick-bedded over thicknesses of tens of metres interspersed with units up to few metres very thin to thin-bedded. Sparse very thick beds of massive sandstone. Interbedded siltstone or silty mudstone generally in thin beds. Sandstone and siltstone typically pale green when fresh with characteristic deep rusty brown weathering reflecting relatively high carbonate content. Distinguished from the Glendearg and Selcoth Formations by relatively high carbonate content and associated weathering character.
Definition of Lower Boundary: Faulted; stratigraphical contact not preserved.
Definition of Upper Boundary: Faulted; no stratigraphical contact preserved.
Thickness: Uncertain, likely to be several thousand metres.
Geographical Limits: Southern Scotland.
Parent Unit: Hawick Group (HWK)
Previous Name(s): Hawick Group (HWK)
Hawick Rocks (-3383)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Redcleugh Edge to Kirkhill, south of Eskdale. 
Reference(s):
British Geological Survey. 1991. Moffatdale. Solid Geology. 1:25 000. Classical areas of British geology. (Keyworth, Nottingham: British Geological Survey). 
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.) 
Peach, B N and Horne, J. 1899. The Silurian Rocks of Britain, Volume 1. Scotland. Memoir of the Geological Survey of the United Kingdom. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable