Derryvree’s Permafrost Pondlife
Archived: 24 September 2026
Around 30,761 BCE, Ireland cannot be described through annual events, but through Late Pleistocene environmental evidence. At Derryvree, County Fermanagh, organic freshwater sediments between glacial tills indicate a temporary ice-free, periglacial wetland during Marine Isotope Stage 3. Mosses, sedges, bogbean and mountain avens show cold, treeless tundra conditions with shallow water and summer thaw. Castlepook Cave, County Cork, contains remains from different periods, including mammoth, reindeer, giant deer, predators and cold-adapted mammals, demonstrating varied harsh habitats. A possibly cut-marked reindeer bone suggests intermittent human presence, but provides no proof of settlement. Ice-sheet fluctuations shaped survival and preservation of evidence today.