| 1, Meta-dolerite, meta-gabbro |
| 2, Serpentinite, Neoproterozoic (NE Ox Mts) & Lower Ordovician (Clew Bay, Carnew) |
| 3, Orthogneiss suite, mainly quartz diorite (Connemara) |
| 4, Granodiorite, tonalite, dacite, granite |
| 5, Gabbro, dolerite & diorite |
| 6, Microgranite & porphyry |
| 7, Appinite Suite |
| 8, Granite, granodiorite |
| 9, Granite, granophyre |
| 10, Rhyolite |
| 11, Dolerite & gabbro |
| 12, Rhinns Complex (Inishtrahull); Syenitic orthogneiss, minor metagabbro |
| 13, Mullet Gneiss; Granitic orthogneiss |
| 14, Cross Point Gneiss; Granitic orthogneiss |
| 15, Doolough Gneiss & Granite; Granitic orthogneiss & granite |
| 16, Kilmore Quay Group; Paragneiss, schist |
| 17, Greenore Point Group; Schistose amphibolite |
| 18, Tyrone Central Inlier; Quartzo-feldspathic paragneiss & schist |
| 19, Slishwood Division; Quartzo-feldspathic paragneiss |
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| 20, Inishkea Division (possibly Dalradian); Psammitic & pelitic schist |
| 21, Grampian Group; Psammitic & pelitic schist |
| 22, Appin Group; Quartzite |
| 23, Appin Group; Psammitic & pelitic schist & marble |
| 24, Argyll Group; Paragneiss & migmatite |
| 25, Argyll Group; Amphibolite & amphibolitic schist |
|
| 26, Argyll Group; Quartzite |
| 27, Argyll Group; Psammitic & pelitic schist, marble, amphibolite, diamictite |
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| 28, Southern Highland Group; (Epidote-)amphibolitic schist & tuff |
| 29, Southern Highland Group; Pelitic & psammitic schist, phyllite & marble |
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| 30, Marine; Quartzite & minor slate |
| 31, Marine; Slate |
| 32, Marine; Greywacke & shale |
| 33, Basalt - andesite, tuff & shale |
|
| 34, Rhyolite and rhyolitic tuff |
| 35, Deep marine; Slate, schist & minor greywacke |
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| 36, Deep marine; Greywacke, shale, sandstone & conglomerate |
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| 37, Basalt - andesite, tuff, slate & mudstone |
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| 38, Rhyolite, rhyolitic tuff & slate |
| 39, Deep marine; Slate, shale, minor sandstone & siltstone |
| 40, Marine to fluvial; Greywacke, shale, sandstone & conglomerate |
| 41, Melange (Ordovician or Silurian); Greywacke, sandstone & conglomerate |
| 42, "Moffat shale" facies (Ordovician - Silurian); Shale & greywacke |
|
| 43, Shallow marine (Dunquin Group, Dingle); Siltstone, sandstone, tuff, limestone |
| 44, Rhyolitic tuff, basalt & andesite (in Dunquin Group) |
| 45, Shallow marine (Croagh Patrick Succession); Sandstone, siltstone, conglomerate |
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| 46, Quartzite (in Croagh Patrick Succession) |
|
| 47, Alluvial - playa (Louisburgh - Clare Island Succession); Sandstone, siltstone, conglomerate |
| 48, Transgression - regression sequence (Killary Hbr - Joyces Country Succ.); Sandstone, conglomerate, greywacke, mudstone, tuff |
| 49, Deep marine turbidite sequence; Mudstone, greywacke & conglomerate |
| 50, Basalt, andesite, basaltic & andesitic tuff |
| 51, Rhyolite & rhyolitic tuff |
| 52, Continental redbed facies; Sandstone, siltstone & mudstone (base of Dingle Group is in the Upper Silurian) |
| 53, Continental redbed facies; Sandstone, siltstone & mudstone |
| 54, Continental redbed facies; Sandstone, conglomerate & siltstone (in places extends into the Carboniferous) |
|
| 55, Shallow marine, (Cork Group, Old Head Sandstone Fm); Sandstone & mudstone |
| 56, Basalt, trachyte, syenite & tuff |
| 57, Marine (Cork Group) (extends into the Visean); Mudstone, sandstone & thin limestone |
| 58, Shallow marine ("Lower Limestone Shale"); Shale, sandstone & thin limestone |
| 59, Shallow marine & coastal plain (basal clastics); Sandstone, mudstone & conglomerate |
| 60, Shallow & marginal marine (Navan Group); Dark-grey limestone, mudstone, sandstone, minor evaporite |
| 61, Marine shelf & ramp facies; Argillaceous dark-grey bioclastic limestone, subsidiary shale |
| 62, Waulsortian mudbank; Pale-grey massive limestone |
| 63, Shallow marine & coastal plain (Basal Clastics); Sandstone, mudstone & conglomerate |
| 64, Marine shelf facies; Limestone & calcareous shale |
| 65, Marine basinal facies (Tobercolleen & Lucan Fms - "Calp"); Dark-grey argillaceous & cherty limestone & shale |
| 66, Marginal marine (Mullaghmore, Downpatrick & Clogher Valley Fms); Sandstone, mudstone & evaporite |
| 67, Shallow water marine (Armagh Group); Limestone, limestone conglomerate, palaeokarst with red palaeosols |
| 68, Marginal marine (Meenymore Formation); Mudstone, sandstone & evaporite |
| 69, Fluvio-deltaic & minor marine (late Visean to Namurian: Ballycastle); Sandstone, mudstone, thin limestone & coal |
| 70, Continental redbed facies (late Visean to early Westphalian); Sandstone, conglomerate & mudstone |
| 71, Fluvio-deltaic & basinal marine (Turbiditic); Shale, sandstone, siltstone & coal |
| 72, Fluvio-deltaic & shallow marine; Shale, sandstone & siltstone with coal |
| 73, Continental redbed facies & shallow marine; Sandstone, conglomerate, magnesian limestone, marl, evaporite |
|
| 74, Continental redbed facies (Permo-Triassic, Wexford); Sandstone, conglomerate & siltstone |
| 75, Continental redbed facies, lagoonal & shallow marine; Sandstone & mudstone with evaporite |
| 76, Shallow marine (Lias); Mudstone & limestone |
| 77, Shallow marine (Upper Cretaceous); Chalk, flint, glauconitic sandstone& chalk breccia |
| 78, Undifferentiated minor volcanic rocks |
| 79, Lower Basalt Formation; Olivine basalt lava |
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| 80, Interbasaltic Formation; Laterite, bauxite & lithomarge |
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| 81, Causeway Tholeiite Member; Columnar tholeiitic basalt lava |
| 82, Upper Basalt Formation; Olivine basalt lava |
| 83, Lacustrine; Clay, sand & lignite |
