| LOUGH NEAGH CLAYS GROUP - CLAY AND LIGNITE |
| BALLYLAGAN MEMBER - BAUXITE-CLAY |
| CARLINGFORD COMPLEX - AGGLOMERATE |
| CARLINGFORD COMPLEX - GABBRO |
| CARLINGFORD COMPLEX - GRANOPHYRIC GRANITE |
| COAGH CONGLOMERATE MEMBER - CONGLOMERATE |
| INTERBASALTIC FORMATION - BAUXITE-CLAY |
| LOWER BASALT FORMATION - ANDESITE |
| LOWER BASALT FORMATION - BASALT |
| LOWER BASALT FORMATION - PYROCLASTIC-ROCK |
| MOURNE MOUNTAINS GRANITE (G1) - GRANITE |
| MOURNE MOUNTAINS GRANITE (G2) - GRANITE |
| MOURNE MOUNTAINS GRANITE (G3) - GRANITE |
| MOURNE MOUNTAINS GRANITE (G4) - GRANITE |
| MOURNE MOUNTAINS GRANITE (G5) - GRANITE |
| PORT NA SPANIAGH MEMBER - BAUXITE-CLAY |
| SHANE'S HILL RHYODACITE - FELSITE |
| TARDREE RHYOLITE COMPLEX - RHYOLITE |
| TEMPLEPATRICK RHYOLITE - RHYOLITE |
| UPPER BASALT FORMATION - ANDESITE |
| UPPER BASALT FORMATION - BASALT |
| BALLYRAINEY SILL - MICROGABBRO |
| CORKEY ROCKS PLUG - MICROGABBRO |
| DUNDONALD SILL - MICROGABBRO |
| FAIR HEAD SILL - MICROGABBRO |
| GARRISON SILL - MICROGABBRO |
| MAGILLIGAN SILL - MICROGABBRO |
| PORTRUSH SILL - MICROGABBRO |
| SLIEVE GULLION COMPLEX - AGGLOMERATE |
| SLIEVE GULLION COMPLEX - FELSITE |
| SLIEVE GULLION COMPLEX - GABBRO |
| SLIEVE GULLION COMPLEX - GRANOPHYRIC GRANITE |
| SLIEVE GULLION COMPLEX - MICROGABBRO |
| SCAWT HILL PLUG - MICROGABBRO |
| SLEMISH PLUG - MICROGABBRO |
| SCRABO SILL - MICROGABBRO |
| UNNAMED DYKE, PALAEOGENE - AGGLOMERATE |
| UNNAMED DYKE, PALAEOGENE - FELSITE |
| UNNAMED DYKE, PALAEOGENE - GABBRO |
| UNNAMED DYKE, PALAEOGENE - GRANITE |
| UNNAMED DYKE, PALAEOGENE - MICROGABBRO |
| UNNAMED IGNEOUS INTRUSION, PALAEOGENE - GABBRO |
| UNNAMED IGNEOUS INTRUSION, PALAEOGENE - MICROGABBRO |
| UNNAMED IGNEOUS INTRUSION, PALAEOGENE - RHYOLITE |
| UNNAMED SILL, PALAEOGENE - MICROGABBRO |
| HIBERNIAN GREENSANDS FORMATION AND ULSTER WHITE LIMESTONE FORMATION (UNDIFFERENTIATED) - CHALK AND S |
| PENARTH GROUP - MUDSTONE |
| MERCIA MUDSTONE GROUP - ARGILLACEOUS ROCK |
| RED ARCH FORMATION - CONGLOMERATE AND [SUBEQUAL/SUBORDINATE] SANDSTONE, INTERBEDDED |
| BELFAST GROUP - ARGILLACEOUS ROCKS WITH SUBORDINATE SANDSTONE AND EVAPORITIC ROCKS |
| BELFAST GROUP - BRECCIA AND SANDSTONE, INTERBEDDED |
| BELFAST GROUP - DOLOMITIC LIMESTONE AND ARGILLACEOUS ROCKS |
| BELFAST GROUP - INTERBEDDED SANDSTONE AND [SUBEQUAL/SUBORDINATE] LIMESTONE |
| SHERWOOD SANDSTONE GROUP - SANDSTONE |
| ENLER GROUP - INTERBEDDED SANDSTONE AND CONGLOMERATE |
| ENLER GROUP - SANDSTONE AND SUBORDINATE BRECCIA |
| ENLER GROUP - SANDSTONE |
| SLIEVEBANE GROUP - INTERBEDDED SANDSTONE AND CONGLOMERATE |
| COAL MEASURES GROUP [OBSOLETE EXCEPT IN NORTHERN IRELAND: USE PCM, SWCM, CMSC] - INTERBEDDED SANDST |
| GOWLAUN SHALE FORMATION, LACKAGH SANDSTONE FORMATION AND BENCROY SHALE FORMATION (UNDIFFERENTIATED) |
| BRISCLOONAGH SANDSTONE FORMATION - INTERBEDDED SANDSTONE AND [SUBEQUAL/SUBORDINATE] ARGILLACEOUS ROC |
| MILLSTONE GRIT GROUP [SEE ALSO MIGR] - SANDSTONE, SILTSTONE AND MUDSTONE |
| ALDERWOOD MUDSTONE - MUDSTONE |
| BALLINAMALLARD MUDSTONE FORMATION - MUDSTONE |
| BALLYREAGH CONGLOMERATE FORMATION - CONGLOMERATE AND [SUBEQUAL/SUBORDINATE] SANDSTONE, INTERBEDDED |
| CARRAUN SHALE FORMATION AND DERGVONE SHALE FORMATION (UNDIFFERENTIATED) - MUDSTONE |
| CASTLE ESPIE GROUP - INTERBEDDED LIMESTONE AND MUDSTONE |
| GREENAN SANDSTONE FORMATION - SANDSTONE |
| ROSSMORE MUDSTONE FORMATION - ARGILLACEOUS ROCK |
| BLACKWATER LIMESTONE FORMATION - LIMESTONE |
| BRICKLIEVE LIMESTONE FORMATION - LIMESTONE |
| CARNMORE SANDSTONE MEMBER - SANDSTONE |
| CARRICKANESS SANDSTONE FORMATION - SANDSTONE, SILTSTONE AND MUDSTONE |
| DARTRY LIMESTONE FORMATION - LIMESTONE |
| DESERTMARTIN LIMESTONE FORMATION - INTERBEDDED LIMESTONE, ARGILLACEOUS ROCKS AND SUBORDINATE SANDSTO |
| GLENCAR LIMESTONE FORMATION - INTERBEDDED LIMESTONE AND MUDSTONE |
| GLENADE SANDSTONE FORMATION AND BELLAVALLEY FORMATION (UNDIFFERENTIATED) - SANDSTONE WITH SUBORDINAT |
| KNOCKMORE LIMESTONE MEMBER - MUDMOUND LIMESTONE |
| MEENYMORE FORMATION - INTERBEDDED ARGILLACEOUS ROCK AND [SUBEQUAL/SUBORDINATE] LIMESTONE |
| MAYDOWN LIMESTONE FORMATION - ARGILLACEOUS, MUDDY LIMESTONE/CEMENTSTONE/CALCILUTITE |
| ROCKDALE LIMESTONE FORMATION - INTERBEDDED LIMESTONE AND [SUBEQUAL/SUBORDINATE] ARGILLACEOUS ROCKS |
| TOPPED MOUNTAIN SANDSTONE FORMATION - SANDSTONE, SILTSTONE AND MUDSTONE |
| BENBULBEN SHALE FORMATION - MUDSTONE |
| BUNDORAN SHALE FORMATION - MUDSTONE AND LIMESTONE, INTERBEDDED |
| LISGORMAN SHALE FORMATION - MUDSTONE AND LIMESTONE, INTERBEDDED |
| MULLAGHMORE SANDSTONE FORMATION - INTERBEDDED SANDSTONE AND [SUBEQUAL/SUBORDINATE] ARGILLACEOUS ROCK |
| MUCKROSS SANDSTONE FORMATION - SANDSTONE |
| QUARRY SANDSTONE - SANDSTONE |
| ARDNAMONA SANDSTONE FORMATION - INTERBEDDED SANDSTONE AND [SUBEQUAL/SUBORDINATE] ARGILLACEOUS ROCKS |
| ARMAGH GROUP - INTERBEDDED LIMESTONE, ARGILLACEOUS ROCKS AND SUBORDINATE SANDSTONE |
| BASAL CLASTICS MEMBER - INTERBEDDED SANDSTONE AND [SUBEQUAL/SUBORDINATE] ARGILLACEOUS ROCKS |
| BALLYSHANNON LIMESTONE FORMATION - MUDMOUND LIMESTONE |
| BALLYSHANNON LIMESTONE FORMATION - LIMESTONE |
| BALLYSTEEN FORMATION - INTERBEDDED LIMESTONE AND MUDSTONE |
| BANNAGHER SANDSTONE FORMATION - SANDSTONE |
| CALHAME LIMESTONE - LIMESTONE |
| CARLINGFORD LIMESTONE GROUP - CALCAREOUS SANDSTONE |
| CARLINGFORD LIMESTONE GROUP - LIMESTONE |
| CLADY LIMESTONE MEMBER - LIMESTONE |
| CLARAGH SANDSTONE FORMATION - SANDSTONE |
| DRUMGESH SHALE FORMATION - MUDSTONE AND LIMESTONE, INTERBEDDED |
| KEENAGHAN SHALE FORMATION - MUDSTONE |
| OAKPORT LIMESTONE FORMATION - INTERBEDDED LIMESTONE AND MUDSTONE |
| RINN POINT LIMESTONE FORMATION - LIMESTONE |
| DERRYLORAN FORMATION - CONGLOMERATE AND [SUBEQUAL/SUBORDINATE] SANDSTONE, INTERBEDDED |
| ANNACLARE GROUP - SANDSTONE, SILTSTONE AND MUDSTONE |
| BARONY GLEN FORMATION - SANDSTONE, CONGLOMERATE AND [SUBORDINATE] ARGILLACEOUS ROCKS |
| BOYLE SANDSTONE FORMATION - SANDSTONE |
| COOLDARAGH FORMATION - SILTY MUDSTONE |
| DARGAN LIMESTONE FORMATION - ARGILLACEOUS, MUDDY LIMESTONE/CEMENTSTONE/CALCILUTITE |
| DRUMMAN MORE SANDSTONE FORMATION - SANDSTONE |
| EDERGOLE FORMATION - CONGLOMERATE AND [SUBEQUAL/SUBORDINATE] SANDSTONE, INTERBEDDED |
| FEARNAGHT FORMATION - INTERBEDDED SANDSTONE AND CONGLOMERATE |
| HOLYWOOD GROUP - SANDSTONE, CONGLOMERATE AND [SUBORDINATE] ARGILLACEOUS ROCKS |
| KILBRYAN LIMESTONE FORMATION - INTERBEDDED LIMESTONE AND MUDSTONE |
| MOY SANDSTONE FORMATION - SANDSTONE, CONGLOMERATE AND [SUBORDINATE] ARGILLACEOUS ROCKS |
| NAVAN GROUP - INTERBEDDED LIMESTONE AND MUDSTONE |
| OMAGH SANDSTONE GROUP - SANDSTONE, SILTSTONE AND MUDSTONE |
| OWENKILLEW SANDSTONE GROUP - INTERBEDDED SANDSTONE AND [SUBEQUAL/SUBORDINATE] ARGILLACEOUS ROCKS |
| TYRONE GROUP - SANDSTONE WITH SUBORDINATE ARGILLACEOUS ROCKS AND LIMESTONE |
| ULSTER CANAL FORMATION - SANDSTONE WITH SUBORDINATE ARGILLACEOUS ROCKS AND LIMESTONE |
| ALTAGOAN FORMATION - SANDSTONE AND MUDSTONE |
| BALLYNESS FORMATION - INTERBEDDED SANDSTONE AND CONGLOMERATE |
| CLOGHER VALLEY FORMATION - INTERBEDDED ARGILLACEOUS ROCK AND [SUBEQUAL/SUBORDINATE] LIMESTONE |
| INISCARN FORMATION - CONGLOMERATE AND [SUBEQUAL/SUBORDINATE] SANDSTONE, INTERBEDDED |
| CARBONIFEROUS LIMESTONE SUPERGROUP - INTERBEDDED LIMESTONE AND [SUBEQUAL/SUBORDINATE] ARGILLACEOUS R |
| CARBONIFEROUS LIMESTONE SUPERGROUP - TUFF AND LAVA |
| BALLYDURNIAN BRECCIA FORMATION - BRECCIA AND SANDSTONE, INTERBEDDED |
| SHANMULLAGH FORMATION - SANDSTONE, SILTSTONE AND MUDSTONE |
| TEDD FORMATION - SANDSTONE, SILTSTONE AND MUDSTONE |
| MAIN DONEGAL GRANITE - GRANITE |
| GORTFINBAR CONGLOMERATE FORMATION - CONGLOMERATE AND [SUBEQUAL/SUBORDINATE] SANDSTONE, INTERBEDDED |
| RAVEAGH SANDSTONE FORMATION - SANDSTONE, SILTSTONE AND MUDSTONE |
| CUSHENDALL PORPHYRY - GRANODIORITE |
| ARDARA PLUTON PHASE 3 - GRANODIORITE |
| BALLYMASTOCKER FORMATION - CONGLOMERATE AND [SUBEQUAL/SUBORDINATE] SANDSTONE, INTERBEDDED |
| KEADEW FORMATION - INTERBEDDED SANDSTONE AND [SUBEQUAL/SUBORDINATE] ARGILLACEOUS ROCKS |
| ROSSES CENTRED COMPLEX PHASE 3 - GRANITE |
| ROSSES CENTRED COMPLEX PHASE 4 - GRANITE |
| CROSS SLIEVE GROUP - CONGLOMERATE AND [SUBEQUAL/SUBORDINATE] SANDSTONE, INTERBEDDED |
| CROSS SLIEVE GROUP - LAVA AND TUFF |
| DONEGAL APPINITE SUITE - DIORITE |
| ARDARA PLUTON PHASE 1 - DIORITE |
| ARDARA PLUTON PHASE 2 - GRANODIORITE |
| BARNESMORE PLUTON - GRANOPHYRIC GRANITE |
| BARNESMORE PLUTON (PHASE 2) - GRANITE |
| BARNESMORE PLUTON (PHASE 3) - GRANITE |
| BARRACK HILL ANDESITE MEMBER - ANDESITE |
| FANAD PLUTON - GRANODIORITE |
| SHANMAGHERY SANDSTONE FORMATION - SANDSTONE |
| THORR PLUTON - GRANODIORITE |
| THORR PLUTON - GRANITE |
| TRAWENAGH BAY PLUTON - GRANITE |
| TULLAGH POINT PLUTON - GRANODIORITE |
| NEWRY GRANODIORITE COMPLEX - DIORITE |
| NEWRY GRANODIORITE COMPLEX - GRANODIORITE |
| NEWRY GRANODIORITE COMPLEX PHASE 1 - GRANODIORITE |
| NEWRY GRANODIORITE COMPLEX PHASE 2 - GRANODIORITE |
| NEWRY GRANODIORITE COMPLEX PHASE 3 - GRANODIORITE |
| LISBELLAW CONGLOMERATE FORMATION - INTERBEDDED ARGILLACEOUS ROCKS AND [SUBEQUAL/SUBORDINATE] SANDSTO |
| GALA GROUP - SANDSTONE |
| HAWICK GROUP - SANDSTONE |
| LAGHT HILL TONALITE - TONALITE |
| LITTLE RIVER GROUP - ARGILLACEOUS ROCK |
| SLIEVE GALLION GRANITE - GRANITE |
| UNNAMED IGNEOUS INTRUSION, LATE CALEDONIAN - DIORITE |
| UNNAMED IGNEOUS INTRUSION, LATE CALEDONIAN - FELSITE |
| UNNAMED IGNEOUS INTRUSION, LATE CALEDONIAN - MONZONITE |
| DESERTCREAT GROUP - INTERBEDDED SANDSTONE AND [SUBEQUAL/SUBORDINATE] ARGILLACEOUS ROCKS |
| HELEN'S BAY FORMATION - INTERBEDDED SANDSTONE AND [SUBEQUAL/SUBORDINATE] ARGILLACEOUS ROCKS |
| MOFFAT SHALE GROUP - MUDSTONE |
| STROKESTOWN GROUP - SANDSTONE |
| TYRONE VOLCANIC GROUP - LAVA |
| TYRONE VOLCANIC GROUP - RHYOLITE |
| BERAGH GRANITE - GRANITE |
| CARRICKMORE GRANITE - GRANITE |
| COPNEY PILLOW-LAVA FORMATION - BASALT |
| CRAIGBARDAHESSIAGH GRANODIORITE - GRANODIORITE |
| GILNAHIRK GROUP - SANDSTONE |
| POMEROY GRANITE - GRANITE |
| TYRONE PLUTONIC GROUP - GABBRO |
| UNNAMED DYKE, LATE CALEDONIAN - FELSITE |
| UNNAMED DYKE, LATE CALEDONIAN - GRANODIORITE |
| UNNAMED DYKE, LATE CALEDONIAN - LAMPROPHYRES |
| TREMOGE GLEN GRANITE - GRANITE |
| BALLYGAWLY GNEISS - GNEISS |
| CREESLOUGH FORMATION AND ARDS BLACK SCHIST (UNDIFFERENTIATED) - PELITE AND [SUBORDINATE] METALIMESTO |
| CARRICK O'HARA FORMATION - PELITE AND [SUBORDINATE] PSAMMITE |
| CORVANAGHAN FORMATION - PSAMMITE |
| ARDS QUARTZITE - QUARTZITE |
| FINTOWN PELITE - GRAPHITIC PELITE |
| FALCARRAGH LIMESTONE - METALIMESTONE AND DOLOSTONE |
| LOUGHROS GROUP AND FALCARRAGH PELITES (UNDIFFERENTIATED) - QUARTZITE, SEMIPELITE AND PELITE |
| OWENGARVE CALCAREOUS FORMATION - DOLOMITIC LIMESTONE |
| GLENCOLUMBKILLE LIMESTONE - DOLOMITIC LIMESTONE |
| DART FORMATION - METALAVA AND METATUFF |
| DART FORMATION - PSAMMITE AND SEMIPELITE |
| AGHYARAN FORMATION - LIMESTONE |
| AGHYARAN FORMATION - PSAMMITE |
| BOULTYPATRICK GRIT - PSAMMITE |
| UPPER CRANA QUARTZITE FORMATION - QUARTZITE |
| CRANFORD LIMESTONE - METALIMESTONE AND DOLOSTONE |
| LOWER CRANA QUARTZITE FORMATION - QUARTZITE |
| CROAGHUBRID PELITE FORMATION - PELITE |
| CULDAFF LIMESTONE - METALIMESTONE AND PELITE |
| GAUGHIN QUARTZITE FORMATION - QUARTZITE |
| KILLETER QUARTZITE FORMATION [OBSOLETE CODE: USE DBKQ] - QUARTZITE |
| LOUGH ESK PSAMMITES - PSAMMITE |
| MURLOUGH BAY FORMATION - PSAMMITE AND SEMIPELITE |
| TERMON FORMATION - PELITE AND [SUBORDINATE] PSAMMITE |
| NEWTOWNSTEWART FORMATION - PSAMMITE |
| OWENCAM FORMATION - METALAVA AND METATUFF |
| OWENCAM FORMATION - PSAMMITE AND SEMIPELITE |
| PORT ASKAIG TILLITE FORMATION - METADIAMICTITE |
| SLIEVE TOOEY QUARTZITE FORMATION - QUARTZITE |
| TORR HEAD LIMESTONE FORMATION - LIMESTONE |
| TORR HEAD LIMESTONE FORMATION - METALAVA AND METATUFF |
| ALTMORE FORMATION - PSAMMITE AND SEMIPELITE |
| BALLYKELLY FORMATION - LIMESTONE |
| BALLYKELLY FORMATION - PSAMMITE AND PELITE |
| CLAUDY FORMATION - LIMESTONE |
| CLAUDY FORMATION - PSAMMITE AND SEMIPELITE |
| CLOGHAN GREEN BEDS - METALAVA AND METATUFF |
| CROAGHGARROW FORMATION - PSAMMITE AND PELITE |
| FAHAN GRITS - EPIDOTIC PSAMMITE |
| FAHAN SLATES - PELITE |
| GREENCASTLE GREEN BEDS - METALAVA AND METATUFF |
| GLENDUN FORMATION - METALAVA AND METATUFF |
| GLENDUN FORMATION - PSAMMITE AND SEMIPELITE |
| INISHOWEN HEAD GRITS - EPIDOTIC PSAMMITE |
| LONDONDERRY FORMATION - PSAMMITE AND PELITE |
| MULLYFA FORMATION - PSAMMITE AND SEMIPELITE |
| RUNABAY FORMATION - METALAVA AND METATUFF |
| RUNABAY FORMATION - PSAMMITE AND SEMIPELITE |
| SHANAGHY GREEN BEDS - METALAVA AND METATUFF |
| DUNGIVEN FORMATION - LIMESTONE |
| DUNGIVEN FORMATION - PSAMMITE AND SEMIPELITE |
| GLENGAWNA FORMATION - PSAMMITE AND SEMIPELITE |
| GLENCOLUMBKILLE PELITE FORMATION - PELITE |
| GLENELLY FORMATION - METALAVA AND METATUFF |
| GLENELLY FORMATION - PSAMMITE AND SEMIPELITE |
| LOUGH MOURNE GRIT FORMATION - EPIDOTIC PSAMMITE |
| MULLAGHCARN FORMATION - PSAMMITE AND SEMIPELITE |
| LOUGH DERG GROUP - PSAMMITE |
| REELAN FORMATION - CALCAREOUS PELITE, METALIMESTONE AND QUARTZITE |
| SESSIAGH-CLONMASS FORMATION AND LOWER FALCARRAGH PELITE FORMATION (UNDIFFERENTIATED) - CALCAREOUS PE |
| SLISHWOOD DIVISION - METAMORPHIC ROCK |
| SLIEVE LEAGUE FORMATION - PELITE AND [SUBORDINATE] PSAMMITE |
| SOUTHERN HIGHLAND GROUP - PSAMMITE AND PELITE |
| UMMOON FORMATION - PELITE AND SEMIPELITE |
| INISHTRAHULL GNEISS - GNEISS |
| UNNAMED IGNEOUS INTRUSION, PRE-CALEDONIAN - METABASALTIC-ROCK |
| UNNAMED IGNEOUS INTRUSION, PRE-CALEDONIAN - SERPENTINITE |
| CAUSEWAY THOLEIITE MEMBER - BASALT |
| DUNAGHY FORMATION - MUDSTONE AND [SUBEQUAL/SUBORDINATE] CONGLOMERATE |
| ROSSES CENTRED COMPLEX PHASE 1 - GRANITE |
| ROSSES CENTRED COMPLEX PHASE 2 - GRANITE |
| TOORIES PLUTON - GRANODIORITE |
| UNNAMED IGNEOUS INTRUSION, EARLY CALEDONIAN - QUARTZ-FELDSPAR-PORPHYRY |
| UNNAMED IGNEOUS INTRUSION, EARLY CALEDONIAN - TONALITE |
| WATERLOO MUDSTONE FORMATION - INTERBEDDED ARGILLACEOUS ROCK AND [SUBEQUAL/SUBORDINATE] LIMESTONE |
| 1, Meta-dolerite, meta-gabbro |
| 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 |
| 2, Serpentinite, Neoproterozoic (NE Ox Mts) & Lower Ordovician (Clew Bay, Carnew) |
| 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 |
| 28, Southern Highland Group; (Epidote-)amphibolitic schist & tuff |
| 29, Southern Highland Group; Pelitic & psammitic schist, phyllite & marble |
| 3, Orthogneiss suite, mainly quartz diorite (Connemara) |
| 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 |
| 36, Deep marine; Greywacke, shale, sandstone & conglomerate |
| 37, Basalt - andesite, tuff, slate & mudstone |
| 38, Rhyolite, rhyolitic tuff & slate |
| 39, Deep marine; Slate, shale, minor sandstone & siltstone |
| 4, Granodiorite, tonalite, dacite, granite |
| 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 |
| 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 |
| 5, Gabbro, dolerite & diorite |
| 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 |
| 6, Microgranite & porphyry |
| 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 |
| 7, Appinite Suite |
| 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 |
| 8, Granite, granodiorite |
| 80, Interbasaltic Formation; Laterite, bauxite & lithomarge |
| 81, Causeway Tholeiite Member; Columnar tholeiitic basalt lava |
| 82, Upper Basalt Formation; Olivine basalt lava |
| 83, Lacustrine; Clay, sand & lignite |
| 9, Granite, granophyre |