The BGS Lexicon of Named Rock Units — Result Details

Ballyreagh Conglomerate Formation

Computer Code: BRC Preferred Map Code: BRC
Status Code: Full
Age range: Brigantian Substage (CX) — Pendleian Substage (CE)
Lithological Description: Sandstones and conglomerates; coarse, grey-green, purple-stained, matrix supported, cobbles of mainly greywacke and rhyolite.
Definition of Lower Boundary: First appearance of conglomerates and pebbly sandstones above underlying Topped Mountain Sandstone Formation, gradational.
Definition of Upper Boundary: Conglomerates and coarse-grained sandstones become thinner towards the top, replaced by an increasing proportion of fine-grained sandstones and mudstones; gradational to Ballinamallard Mudstone Formation.
Thickness: At least 350 metres.
Geographical Limits: Southwestern part of the Fintona Block, Northern Ireland.
Parent Unit: Kilskeery Group (KILS)
Previous Name(s): Dingle Beds (-1993)
Gortfinbar Conglomerate Formation (GOCF)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  South and east flanks of Ballyreagh Mountain, County Fermanagh, 9km northeast of Enniskillen, Northern Ireland. 
Reference(s):
Mitchell, W I and Owens, B, 1990. The geology of the western part of the Fintona Block, Northern Ireland: Evolution of Carboniferous basins. Geological Magazine, Vol.127 (5), 407-426. 
Wilkinson, S B, 1882. The geology of the country around Eniskillen, Fivemiletown, Trillick, Lisbellew and Maguiresbridge. Explanatory Memoir to accompany Sheet 45 of the maps of the Geological Survey of Northern Ireland. Dublin and London. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
N45 N33