Derryvree’s Drumlin Interlude
Archived: 6 October 2026
Thirty thousand years BCE is a modern approximation, not a date capable of identifying a specific Irish event. At Derryvree, County Fermanagh, sediments between two glacial tills record an ice-free interlude around 33,500 calibrated years BP, when shallow freshwater, tundra plants and periglacial conditions existed before renewed ice advance. Irish cave fauna, notably Castlepook’s, shows cold-adapted mammals, including reindeer, mammoth and giant deer, occupied landscapes during Marine Isotope Stage 3. A possibly tool-marked reindeer bone may indicate human activity, but proves neither settlement nor occupation. No evidence supports communities, farming or institutions; Ireland’s fragmentary deep past is geological and palaeoecological.