Derryvree’s Open-Tundra Mosses
Archived: 26 September 2026
30,647 BCE is a modern label, not a recoverable Irish year. Derryvree, County Fermanagh, preserves freshwater sediments between glacial tills, radiocarbon dated broadly to 36,900–31,700 calendar years BP. Mosses and plant remains indicate treeless tundra, shallow water and seasonal productivity during a fluctuating MIS 3 climate. Castlepook Cave, County Cork, documents a diverse Pleistocene fauna, including mammoth, reindeer, giant deer, hyaena and horse, but its assemblage spans time and has complex formation histories. A possibly cut-marked reindeer femur suggests, without proving, human presence. No secure settlements, polities, trade networks or events are known; Ireland remained environmentally dynamic and archaeologically elusive.