The Derryvree Two-Till Wetland
Archived: 2 October 2026
At 30,383 BCE, a modern label within a broad chronological range, Ireland’s evidence records environmental change rather than events. Derryvree, County Fermanagh, preserves freshwater sediments between two glacial tills, indicating an ice-free, cold tundra wetland with pools, mosses, sedges and hardy plants before renewed ice advance. Castlepook Cave, County Cork, documents fluctuating cold-stage fauna including reindeer, mammoth, giant deer, predators and scavengers, though remains are not necessarily contemporaneous. A possibly cut-marked reindeer bone suggests, but does not prove, brief human presence. Lower sea levels altered landscapes, while expanding ice destroyed evidence. No settlement, polity, trade or crossing route is known.