NW Ireland

Somerville, I.D.; Waters, C.N.. 2011 NW Ireland. In: Waters, Colin, (ed.) A revised correlation of Carboniferous rocks in the British Isles. Geological Society of London, 128-132.

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The Carboniferous rocks of north-west Ireland extend from the western margin of the Dublin Basin (see Chapter 21), northwest into Co. Roscommon as far as the Curlew Mountains, and further northwest into Co. Leitrim and Co. Sligo, south Co. Donegal, and north Co. Mayo, north of the Ox Mountains (Fig. 19.1). All the rocks in the region belong to the Mississippian Subsystem. Late Tournaisian, mostly continental or marginal marine facies, and Visean (Chadian to Asbian) shelf limestone of the Tyrone Group occur in counties Roscommon, Mayo, Leitrim, Sligo and Donegal within four structurally controlled basins: the Carrick-on- Shannon Syncline, south of the Curlew Mountains; the Ballymote Syncline, between the Curlew Mountains to the south and the Ox Mountains to the north (Dixon 1972), extending northeast into the Lough Allen Basin and the Cuilcagh Mountains farther to the east in Co. Leitrim; the Sligo Syncline north of the Ox Mountains (Oswald 1955); and the Largymore Syncline, west of Killybegs and St John’s Point in south Co. Donegal. The Tyrone Group is followed by a mainly mudstone-rich sequence with an alternation of marine limestone, shale and sandstone (both marine and fluviodeltaic) of late Visean to Namurian age (Leitrim Group).

Item Type: Publication - Book Section
Programmes: BGS Programmes 2010 > Geological Survey of Northern Ireland
Date made live: 10 Feb 2012 14:03 +0 (UTC)

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