The BGS Lexicon of Named Rock Units — Result Details

Tyrone Plutonic Group

Computer Code: TPG Preferred Map Code: TPG
Status Code: Full
Age range: Ordovician Period (O) — Ordovician Period (O)
Lithological Description: Hornblende gabbro and diorite with cross-cutting invasive dyke systems.
Definition of Lower Boundary: Faulted.
Definition of Upper Boundary: Faulted.
Thickness: Unknown
Geographical Limits: Mid-Ulster, Co.Tyrone c.10km west of Cookstown.
Parent Unit: Not Entered (?)
Previous Name(s): TYRONE IGNEOUS SERIES (PLUTONIC ROCKS)
TYRONE BASIC PLUTONIC COMPLEX (OBSOLETE NAME AND CODE: USE TPG) (DATY)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Principle reference section. Black Rock, c500m south of Beaghmore Stone Circles, Beaghmore Townland, Co. Tyrone (gabbro/diorite complex) 
Reference Section  Carrickmore Quarry (sheeted dyke complex) 
Type Area  East Tyrone, west of Cookstown, east of Beaghbeg, and in vicinity of Carrickmore. 
Reference(s):
Geological Survey of Northern Ireland. Cookstown, sheet 27, solid, 1:50,000. 
Geological Survey of Northern Ireland. Draperstown, sheet 26, solid, 1:50,000 
Hartley, J J. 1933. The geology of north-eastern Tyrone and the adjacent portions of County Londonderry. Proceedings of the Royal Irish Academy, Vol.41, section B. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
N27