Derryvree’s Frozen Sedgebank
Archived: 26 September 2026
Around 30,666 BCE, Ireland’s evidence records environmental change rather than dated events or communities. At Derryvree, County Fermanagh, freshwater silts between glacial tills indicate a locally ice-free interval during the unstable Late Pleistocene, preserving tundra plants, sedges, mosses, aquatic species and insect remains. Castlepook Cave, County Cork, contains bones of mammoth, giant deer, reindeer, bear, hyena and other cold-adapted animals, accumulated over a long period. A possibly stone-cut reindeer femur may suggest brief human involvement, but proves neither settlement nor population. Later ice advance destroyed or buried much evidence, leaving these deposits as limited records of a cold, changing landscape.