The BGS Lexicon of Named Rock Units — Result Details

Tubbrid Sandstone Formation

Computer Code: TBSF Preferred Map Code: TBSF
Status Code: Full
Age range: Holkerian Substage (CQ) — Holkerian Substage (CQ)
Lithological Description: Sandstone, fawn to pale grey, medium- to coarse-grained, micaceous with plant debris; calcareous horizons weathering rusty brown and friable, very fossiliferous and crinoidal.
Definition of Lower Boundary: Not exposed but considered to be conformable with underlying Benbulben Shale Formation.
Definition of Upper Boundary: Not exposed or preserved due to post Carboniferous to Pleistocene erosion.
Thickness: c.25 - 30m
Geographical Limits: Kesh-Omagh area, northwest Carboniferous basin of Ireland.
Parent Unit: Tyrone Group (TYRO)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Type Section  (Now concealed). Formerly exposed in excavations in the car park and for the foundations of Tubbrid Orange Hall. 
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: