| Group or Formation | Period | Notes |
| Ballyadams Formation | Carboniferous | |
| Ballysteen Limestone Formation | Carboniferous | |
| Boyne Group/Feltrim Formation | Carboniferous | |
| Boyne Group/Slane Castle Formation | Carboniferous | |
| Carboniferous Formation | Carboniferous | |
| Clashford House Formation | Ordovician | |
| Clogrenan Formation | Carboniferous | |
| Cloonnamna Formation | Silurian | |
| Courtown Formation | Ordovician | |
| Dartry Limestone Formation | Carboniferous | |
| Drom Point Formation | Silurian | |
| Duncannon Formation | Ordovician | |
| Duncannon Group/Campile Formation | Ordovician | |
| Duncannon Group/Portrane Limestone Formation | Ordovician | |
| Duncannon Group/Tramore Limestone Formation | Ordovician | |
| Feltrim Formation | Carboniferous | |
| Ferriters Cove Formation | Silurian | |
| Fingal Group/Lucan Formation | Carboniferous | |
| Fingal Group/Naul Formation | Carboniferous | |
| Fingal Group/Tober Colleen Formation | Carboniferous | |
| Glencar Limestone Formation | Carboniferous | |
| Grange Allen Formation | Ordovician | |
| Grangegeeth Group/Knockerk Formation | Ordovician | |
| Harrylock Formation | Devonian | |
| Hollyford Formation | Silurian | |
| Holmpatrick Formation | Carboniferous | |
| Hook head Formation | Carboniferous | |
| Kilbride Formation | Silurian | |
| Kilbride Limestone Formation | Carboniferous | |
| Kilcoan Sands Formation | Cretaceous | |
| Kildare Limestone Formation | Ordovician | |
| Kilmore Sandstone Group/Coomhola Formation | Carboniferous, Devonian | |
| Kiltorcan Formation | Devonian | |
| Kiltorcan beds Formation | Devonian | |
| Knockerk Formation | Ordovician | |
| Lane Formation | Carboniferous | |
| Limerick Limestone Formation | Carboniferous | |
| Lough Shee Mudrocks Formation | Ordovician | |
| Lower Bricklieve Limestone Formation | Carboniferous | |
| Mullaghfin Formation | Carboniferous | |
| Murrisk Group/Mweelrea Formation | Ordovician | |
| Navan Group/Liscartan Formation | Carboniferous | |
| Navan Group/Meath Formation | Carboniferous | |
| Navan Group/Moathill Formation | Carboniferous | |
New Red Sandstone Group /
Kingscourt Gypsum Formation | Permian | |
New Red Sandstone Group /
Kingscourt Sandstone Formation | Triassic | |
| Old Red Sandstone Group/Kiltorcan Formation | Devonian | |
| Porter's Gate Formation | Carboniferous | |
| Ribband Group/Booley Bay Formation | Cambrian | |
| Tourmakeady Formation | Ordovician | |
| Upper Bricklieve Limestone Formation | Carboniferous | |
| Upper Shawly Beds Formation | Carboniferous | |
| West Cork Sandstone Formation | Carboniferous | |
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