Derryvree’s Aquatic Refuge
Archived: 19 September 2026
Around 31,120 BCE, Ireland lay within a fluctuating Late Pleistocene environment rather than a datable historical year. At Derryvree, County Fermanagh, organic sediments between glacial tills preserve evidence of an ice-free freshwater wetland, with tundra vegetation, aquatic plants and insects indicating cold, open conditions. Castlepook Cave, County Cork, contains accumulated remains of mammoth, reindeer, giant deer, bears and other fauna, though not all lived simultaneously. A possibly cut-marked reindeer bone suggests brief human activity, but no secure settlement or occupation evidence exists. Later glaciation destroyed many surfaces while preserving rare deposits, leaving climate, habitats and fauna clearer than human history.