Derryvree’s Ancient Bogbean
Archived: 18 September 2026
31,281 BCE is a modern label for a poorly resolved Late Pleistocene interval, rather than a recoverable Irish year. At Derryvree, County Fermanagh, freshwater sediments between glacial tills, dated broadly to 36,900–31,700 calibrated years BP, reveal treeless tundra wetland with bogbean, mountain avens and sedges. Castlepook Cave, County Cork, preserves evidence of diverse cold-climate fauna, including reindeer, mammoth, giant deer, predators and smaller mammals, demonstrating connectivity with north-west Europe. A marked, dated reindeer bone may indicate human butchery, but remains inconclusive. Ireland was an unstable frontier of ice-free habitats and advancing glaciers, without evidence for settled communities, polities or culture.