Maguirebridge’s Freshwater Bed
Archived: 27 September 2026
Although 30,580 BCE cannot denote a recorded Irish event, it lies within a later Pleistocene interval documented by deposits and fauna. At Derryvree, County Fermanagh, freshwater organic sediments between glacial tills, radiocarbon dated broadly to 36,900–31,700 calibrated BP, record an ice-free phase of tundra-steppe, wetlands and severe periglacial conditions. Castlepook Cave, County Cork, preserves diverse cold-stage mammals, including mammoth, reindeer, giant deer, predators and lemmings, accumulated over extended periods. A possibly cut-marked reindeer bone suggests, but cannot prove, Upper Palaeolithic human activity. No evidence establishes settlement, institutions or economy; changing ice, habitats and animal movements define this uncertain Irish landscape.