| 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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