title: List of fossiliferous stratigraphic units in the Republic of Ireland
text: # List of fossiliferous stratigraphic units in the Republic of Ireland
  
  | Group or Formation | Period |
  | - | - |
  | 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 |
  