Geological History (mya)
| 1700 Ireland’s oldest rocks |
Palaeolithic Period (kya)
| 12.5 Alice & Gwendoline Cave, County Clare |
Mesolithic Period (BC)
| 7530 Earliest known human burial |
| 7000 Mount Sandel, County Londonderry, Ulster |
| 7000 Killuragh Cave, County Limerick |
| 6800 Lough Boora, County Offaly, Leinster |
| 6000 Newferry, Co, Londonderry, Ulster |
| 4570 Rockmarshall, County Lough, Leinster |
| 4560 Sutton, County Dublin, Leinster |
| 4495 Ferriter’s Cove, County Kerry, Munster |
| 4200 Poulnabrone, County Clare, Munster |
| 4000 Dalkey Island, County Dublin, Munster |
| 4000 Sramore, County Antrim, Ulster |
Neolithic Period (BC)
| 4000 Rathcroghan, County Roscommon, Connacht |
| 3800 Ballynagilly, County Tyrone, Ulster |
| 3950 Lyles Hill, County Antrim, Ulster |
| 3500 Céide Fields, County Mayo, Connacht |
| 3500 Lough Gur, County Limerick, Munster |
| 3400 Hill of Tara, County Meath, Leinster |
| 3300 Browne’s Hill, County Carlow, Leinster |
| 3200 Knowth, County Meath, Leinster |
| 3200 Newgrange, County Meath, Leinster |
| 3000 Creevykeel, County Sligo, Connacht |
| 2500 Carrowcrom, County Mayo, Connacht |
| 2500 Dowth, County Meath, Leinster |
Copper Age (BC)
| 2400 Ross Island, County Kerry, Munster |
| 2400-1800 Bell Beaker culture |
Bronze Age (BC)
| 2100 Beltany, County Donegal, Ulster |
| 2000 Cashel Man, County Laois, Leinster |
| 1200 Rathgall, County Wicklow, Leinster |
| 1150 Ballinderry, County Westmeath, Leinster |
| 1100 Drombeg, County Cork, Munster |
| 850 Dowris Phase |
| 700 Navan Fort, County Armagh, Ulster |
Early Iron Age (BC)
| 500 Knockaulin, County Kildare, Ulster |
| 450-00-100 La Tène period |
| 390-370 Black Pig’s Dyke, Ulster-Connacht |
| 330-320 Pytheas circumnavigated Britain |
| 148–147 Corlea trackway, Leinster |
| 100 Dorsey earthwork, Ulster |
Late Iron Age (AD)
| 1st century: Arretine ware, Leinster |
| 4th century: Ogham script |
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