| Basalts & other Volcanic rocks |
| Permo-Triassic Sandstones |
| Permo-Triassic Mudstones and Gypsum |
| Westphalian Sandstones |
| Westphalian Shales |
| Namurian Shales |
| Namurian Sandstones |
| Namurian Undifferentiated |
| Dinantian Shales and Limestones |
| Dinantian Mixed Sandstones, Shales and Limestones |
| Dinantian Sandstones |
| Dinantian Pure Bedded Limestones |
| Dinantian Upper Impure Limestones |
| Dinantian Dolomitised Limestones |
| Dinantian Pure Unbedded Limestones |
| Dinantian Lower Impure Limestones |
| Dinantian (early) Sandstones, Shales and Limestones |
| Dinantian Mudstones and Sandstones (Cork Group) |
| Devonian Kiltorcan-type Sandstones |
| Devonian Old Red Sandstones |
| Granites & other Igneous Intrusive rocks |
| Silurian Metasediments and Volcanics |
| Ordovician Metasediments |
| Ordovician Volcanics |
| Cambrian Metasediments |
| Precambrian Quartzites, Gneisses & Schists |
| Precambrian Marbles |