The BGS Lexicon of Named Rock Units — Result Details

Skea Sandstone Member

Computer Code: SKEA Preferred Map Code: SKEA
Status Code: Full
Age range: Arundian Substage (CJ) — Arundian Substage (CJ)
Lithological Description: Sandstone, pale grey to blue-grey, medium-grained, calcareous, sparsely bioturbated, fossiliferous. Proximally is a channel (palaeovalley) fill conglomerate with mainly metamorphic clasts.
Definition of Lower Boundary: Conformable distally, resting on soft multi-coloured clays that lie on top surface of Ballyshannon Limestone Formation. Proximally, lower contact is deeply erosional into underlying limestone formation.
Definition of Upper Boundary: Abrupt change, in distal location, from sandstone up into conformable silty mudstones, shales and thin sandstones of normal Bundoran Shale. Proximally, top of member is not exposed.
Thickness: 0 - 4.5m (measured), probably 10 - 12m in area of main palaeovalley conglomerate fill.
Geographical Limits: Kesh-Omagh area of the northwest Carboniferous basin in Ireland.
Parent Unit: Bundoran Shale Formation (BUNS)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Type Section  Magheraculmoney (Ederny) Quarry, 1km south-south-east of Ederny village. Base of member and underlying strata exposed in southeast wall, top and succeeding strata exposed at top of west face. 
Reference Section  Prominent scarp, 2.33km west of west end of Lough Lee. Exposes conglomeratic facies. 
Mitchell, W I, Johnston, T P and Legg, I C. 2004. Geology of the country around Kesh, Co. Fermanagh and Omagh, Co. Tyrone. Geological Sheets 32 and part of 31 (Kesh) and 33 (Omagh). Geological Survey of Northern Ireland. Technical Report GSNI 04/1. 
1:50K maps on which the lithostratigraphical unit is found, and map code used: