The BGS Lexicon of Named Rock Units — Result Details

Powillimount Sandstone Member

Computer Code: POSD Preferred Map Code: POSD
Status Code: Full
Age range: Arundian Substage (CJ) — Holkerian Substage (CQ)
Lithological Description: Interbedded bioturbated sandstone, sandy limestone (some oncolite beds) and mudstone, sparsely fossiliferous.
Definition of Lower Boundary: Gradational with the Gillfoot Sandstone Formation.
Definition of Upper Boundary: Taken at top of the Thirlstane Sandstone Member, which lies conformably under the Arbigland Limestone Formation.
Thickness: 135m
Geographical Limits: Powillimount shore, Southerness, Kirkcudbrightshire, south-western Scotland (Southern Uplands).
Parent Unit: Fell Sandstone Formation (FELL)
Previous Name(s): Powillimount Sandstone Formation (-4847)
Powillimount Beds [Obsolete Name And Code: Use POSD] (POW)
Powillimount Member (-4269)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Coastal section 100m ENE of Powillimount Farm, Southerness, Kirkcudbrightshire. 
Reference(s):
Deegan, C E. 1970. The petrology and sedimentology of the Lower Carboniferous rocks between White Port and Kirkbean, Kirkcudbrightshire. University of Wales, Aberystwyth PhD Thesis (unpublished). 
Craig, G Y. 1956. The Lower Carboniferous outlier of Kirkbean, Kirkcudbrightshire. Transactions of the Geological Society of Glasgow, Vol. 22, 113 - 132. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S006 S005 S006