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.