| Group or Formation
|
Period
|
Notes
|
| Bardahessiagh Formation |
Ordovician |
|
| Blackstokes Limestone Formation |
Carboniferous |
|
| Blackwater Limestone Formation |
Carboniferous |
|
| Carrickaness Sandstone Formation |
Carboniferous |
|
| Chalk Marl Formation |
Cretaceous |
|
| Glauconitic Chalk Formation |
Cretaceous |
|
| Glencar Formation |
Carboniferous |
|
| Killey Bridge Formation |
Ordovician |
|
| Lias Formation |
Jurassic |
|
| Lias Group/Waterloo Mudstone Formation |
Jurassic |
|
| Limehill Beds Formation |
Silurian |
|
| Maydown Limestone Formation |
Carboniferous |
|
| Pernarth Group/Westbury Formation |
Triassic |
|
| Tirnaskea Formation |
Ordovician |
|
| Waterloo Formation |
Jurassic |
|
| White Limestone Formation |
Cretaceous |
|
