List of geological faults of Northern Ireland
# List of geological faults of 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 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.
* 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 faults :

| Fault name | County | grid ref | GSNI map sheet | book reference/s |
| - | - | - | - | - |
| Ballyconnell-Belturbet Fault | | | NIr 57/58 | |
| Ballytober Fault | Antrim | D3304 | | |
| Belcoo Fault | Fermanagh | G1842 | NIr 44 | Mem NI 44 |
| Camlough Fault | Armagh | J0621 | | |
| Carnlough Fault | Antrim | D2508 | | |
| Clogher Valley Fault | Fermanagh | G4545 | | |
| Elagh Fault | Tyrone | H8573 | | |
| Great Gaw Fault | Antrim | | | Lyle P. 2003 (p170,177) |
| Killadeas - Seskinore Fault | Fermanagh, Tyrone | G4161 | | |
| Kinnegoe Fault | Armagh | H0459 | | |
| Laghy Fault | Tyrone | H0984 | | |
| Newry Fault | Armagh, Down | J0829 | | |
| Omagh Fault | Tyrone | | | Lyle P. 2003 (p117,124,125) |
| Omagh Thrust | Tyrone | G4573 | | |
| Orlock Bridge Fault | Armagh, Down | J5079 | | Lyle P. 2003 (p41,42) |
| Pettigoe Fault | Tyrone | H2080 | | |
| Sixmilewater Fault | Antrim | J3091 | | |
| Tempo - Sixmilecross Fault | Fermanagh | H3547 | | |
| Tow Valley Fault | Antrim, Londonderry | C9524 | | Lyle P. 2003 (p63,65,177,179) |
