Derryvree Freshwater Silts
Archived: 7 October 2026
Around 30,154 BCE, Ireland was a climatically unstable Late Pleistocene landscape rather than a documented human society. Derryvree, County Fermanagh, preserves freshwater silts between glacial tills, demonstrating a locally ice-free, treeless periglacial wetland interval before renewed glaciation, though its radiocarbon date cannot identify a precise calendar year. Plants indicate open, cold, wet habitats. Castlepook Cave, County Cork, contains MIS 3 fauna including mammoth, reindeer and hyaena, but deposits are chronologically complex. A possibly cut-marked reindeer femur may indicate brief human activity, not settlement. Together, these records reveal shifting Irish habitats, animal movement and later ice-driven destruction or burial of evidence.