The BGS Lexicon of Named Rock Units — Result Details

Corvanaghan Formation

Computer Code: CORV Preferred Map Code: CORV
Status Code: Full
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Predominantly quartz feldspar biotite granular gneiss with subordinate mica schist and pelite. Metamorphosed up to sillimanite grade.
Definition of Lower Boundary: Not seen due to faulting.
Definition of Upper Boundary: Not seen due to faulting.
Thickness: Unknown.
Geographical Limits: Central County Tyrone, Northern Ireland. Corvanaghan, Fir Mountain, Beleevenamore, Evishanoran.
Parent Unit: Lough Derg Group (MLD)
Previous Name(s): Tyrone Central Inlier (-811)
Corvanaghan Formation [Obsolete Code: Use CORV] (DACV)
Tyrone Metamorphic Inlier [Obsolete Name And Code: Use CORV] (DATI)
Corvanaghan Formation (CORV)
Alternative Name(s): none recorded or not applicable
Type Section  Corvanaghan Quarry, Corvanaghan Mountain, 12km west north west of Cookstown, County Tyrone. 
Geological Survey of Northern Ireland 1979. Pomeroy, sheet 34, solid, 1:50 000. [Southampton, Ordnance Survey for Institute of Geological Sciences.] 
1:50K maps on which the lithostratigraphical unit is found, and map code used: