Derryvree Beneath Renewed Ice
Archived: 18 September 2026
At 31,290 BCE, Ireland cannot be described through a precisely dated historical event, but through a Late Pleistocene environmental horizon. Derryvree, County Fermanagh, preserves freshwater sediments and organic remains between glacial tills, indicating an ice-free periglacial mosaic of tundra, wetlands, grasses, sedges and juniper during MIS 3. Its radiocarbon date spans a broad calibrated range, including this notional year. Crag Cave records milder episodic conditions, while Castlepook Cave documents cold-adapted fauna, including mammoth, reindeer, giant deer, hyaena and Arctic fox. Human presence remains possible, based on a potentially butchered reindeer bone, but settlement is unproven. Evidence reveals ice and water.