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 faults, thrusts or thrust faults and strike-slip faults.

Key to table Column 1 indicates the name of the fault. Note that different authors may deploy different names for one and the same feature, or a part of a feature. Conversely the same name may be applied to two different features, particularly in the case of smaller faults with a wide geographic separation. Column 2 indicates the county in which the fault occurs. Some traverse two or more counties of course. Column 3 indicates the Irish grid reference for the approximate midpoint of the fault (as mapped). Note that the mapped extent of a fault may not correspond to its actual extent. Column 4 indicates on which sheet of the Geological Survey of Northern Ireland's 1:50,000 scale geological map series of Northern Ireland, the fault is shown and named (either on map/s or cross-section/s or both). Some of the faults are also depicted on the 1:250,000 scale geological map of Northern Ireland.Geological Survey of Northern Ireland 1997 Northern Ireland. Solid Geology (2nd edn) 1:250,000 (Keyworth, Nottingham; British Geological Survey). Column 5 indicates a selection of publications in which references to the fault may be found. See references section for full details of publication.

Tabulated list of faults

+Sortable table of faultsFault name Countygrid refGSNI map sheetbook reference/sBallyconnell-Belturbet Fault NIr 57/58Ballytober FaultAntrim D3304 Belcoo FaultFermanagh G1842NIr 44Mem NI 44Camlough FaultArmaghJ0621Carnlough FaultAntrim D2508 Clogher Valley FaultFermanaghG4545 Elagh FaultTyroneH8573 Great Gaw FaultAntrimLyle P. 2003 (p170,177)Killadeas - Seskinore FaultFermanagh, Tyrone G4161 Kinnegoe FaultArmagh H0459 Laghy FaultTyroneH0984 Newry FaultArmagh, Down J0829 Omagh FaultTyroneLyle P. 2003 (p117,124,125)Omagh ThrustTyrone G4573 Orlock Bridge FaultArmagh, DownJ5079Lyle P. 2003 (p41,42)Pettigoe FaultTyrone H2080 Sixmilewater FaultAntrim J3091 Tempo - Sixmilecross FaultFermanaghH3547 Tow Valley FaultAntrim, Londonderry C9524 Lyle P. 2003 (p63,65,177,179)

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, Harpenden

See also List of geological faults of England List of geological faults of Scotland List of geological faults of Wales List of geological folds in Great Britain Geological structure of Great Britain