Welcome to Emerald Archives
Emerald Archives presents Ireland’s story one reference year at a time, from the deep prehistoric past to the modern era. Each article explores the evidence, people, places and developments associated with a particular year and places them within their wider historical setting. The collection brings together archaeology, politics, society, religion, culture, conflict, everyday life and changing landscapes in one continuously expanding timeline. New articles appear here as the archive grows. You can also explore the full Irish History Timeline, search the archive directly, or use Explore to move through the collection by period and subject.
31730–31721 BCE
Derryvree’s Water-Milfoil Record
Approximately 31,728 BCE, Ireland lay in the climatically unstable Late Pleistocene, within MIS 3, rather than a recoverable historical year. Derryvree, County Fermanagh, preserves freshwater sediments between glacial tills, indicating cold, open, largely treeless wetlands with hardy plants during an ice-free interval. Other Ulster sites support environmental fluctuation. Castlepook Cave’s long-lived faunal assemblage records mammals including mammoth, reindeer, lemmings, hyaena and foxes, but not a single contemporaneous community. A modified reindeer bone may indicate an early human visit, yet permanent occupation remains unproven. Falling temperatures preceded later glaciation, while sparse, uncertain evidence rules out claims about societies, beliefs or events.
Castlepook’s Reindeer Corridor
31,729 BCE is not a precise Irish historical date but an approximate position within unstable MIS 3, about 33,700 calibrated years before present. Evidence from Derryvree, Fermanagh, indicates cold, treeless freshwater wetlands supporting sedges, mosses and other adapted life. Castlepook Cave, Cork, preserves fauna including reindeer, mammoth, giant deer, hyaena and Arctic fox, showing ecological links with north-west Europe, although bones may be mixed. A marked reindeer femur possibly records human butchery, suggesting only occasional Upper Palaeolithic visitors, not settlement. No politics, trade or culture can be demonstrated. Growing, uneven ice sheets increasingly transformed habitats and obscured fragmentary Ice-Age records.
Derryvree’s Coldwater Archive
Around 31,730 BCE, Ireland has no recoverable annual history, only fragmentary Ice Age evidence. Derryvree, County Fermanagh, preserves freshwater silts between tills, radiocarbon dated broadly to 36,900–31,700 calibrated years before present, indicating local tundra wetlands before later glaciation. Comparable northern deposits and Crag Cave demonstrate cold but variable MIS 3 conditions. Southern caves, especially Castlepook, contain diverse fauna including mammoth, reindeer and hyaena, though bones may represent separate episodes. A cut-marked reindeer femur suggests possible Upper Palaeolithic visits, not proven settlement. Later ice erosion and sea-level change destroyed evidence. No political, agricultural, cultural or trade history can be established there.
