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The Omagh Thrust Fault is a
/ref> and an extension of the Highland Boundary Fault which runs through Scotland. The fault occurred in the Caledonian orogeny, during a late stage of this period of mountain building. Older sequences of Dalriadan metamorphic
The Omagh Thrust Fault is a geological fault
In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic ...
in County Tyrone. It is of one of the most important structural discontinuities in Northern IrelandDepartment of the Environment NI/ref> and an extension of the Highland Boundary Fault which runs through Scotland. The fault occurred in the Caledonian orogeny, during a late stage of this period of mountain building. Older sequences of Dalriadan metamorphic
strata
In geology and related fields, a stratum ( : strata) is a layer of rock or sediment characterized by certain lithologic properties or attributes that distinguish it from adjacent layers from which it is separated by visible surfaces known as ei ...
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.
See also
*List of geological faults in Northern Ireland
This is a list of the named geological faults affecting the rocks of Northern Ireland.
Terminology
See the main article on faults for a fuller treatment of fault types and nomenclature but in brief, the main types are normal faults, reverse faul ...
* Geology of Northern Ireland
References
General references * Map sheet 44 (and accompanying memoir) of the series of 1:50,000 scale geological maps of Northern Ireland published by Geological Survey of Northern Ireland. * Lyle, P. 2003 Classic geology in Europe 5 ''The north of Ireland'' Terra Publishing, HarpendenFootnotes
Seismic faults of Northern Ireland Geology of Northern Ireland Geography of County Tyrone {{UK-geology-stub