Omagh Thrust

The Omagh Thrust Fault is a geological fault in County Tyrone. It is of one of the most important structural discontinuities in Northern Ireland^[1] and an extension of the Highland Boundary Fault which runs through Scotland.^[2]

The fault occurred in the Caledonian orogeny, during a late stage of this period of mountain building. Older sequences of Dalriadan metamorphic strata were moved over younger Ordovician ones with the fault as their boundary.

There is access to a view of the fault at Mountfield Quarry, County Tyrone. This has been designated an Area of Special Scientific Interest.^[1]

v t e Geology of Northern Ireland
Volcanism	Antrim plateau Benevenagh Black Mountain Cavehill Divis Donald's Hill Giant's Causeway Murlough Bay Rathlin Island	Basalt columns at Giant's Causeway
Volcanic plugs	Carrick a Rede Scawt Hill Slemish Slieve Gallion Slieve Gullion Tievebulliagh
Dykes and sills	Fair Head Ring of Gullion The Maidens The Skerries
Metamorphic	Benbradagh Loughermore Mourne Mountains Mullaghcarn Mullaghmore Sawel Mountain Slieve Bearnagh Slieve Binnian Slieve Commedagh Slieve Croob Slieve Donard Slieve Gallion Slieve Muck Sperrins
Sedimentary	Belmore Mountain Benaughlin Mountain Cuilcagh Hibernian Greensands Group Islandmagee Leitrim Group Magheramorne Marble Arch Caves Slieve Rushen Tyrone Group Ulster White Limestone Group Waterloo Bay
Lists	Geological faults of Northern Ireland
Geology portal Northern Ireland portal

References