Castlepook’s Reindeer Window
Archived: 20 September 2026
Abstract
Around 31,000 BCE, Ireland lay within the cold, unstable Marine Isotope Stage 3, with lower seas, shifting ice, and open tundra-like habitats rather than modern coastlines or forests. Wetland deposits in Fermanagh preserve plants adapted to cold, moist conditions. Castlepook Cave, County Cork, contains re-dated animal remains showing that reindeer, mammoth, giant deer, bears, wolves, Arctic foxes and hyaenas occurred during parts of this period. A possibly cut-marked reindeer femur suggests brief Upper Palaeolithic human contact, but no secure occupation site exists. Environmental evidence, not events or societies, defines this fragmentary era, continually reassessed through improved dating and research methods.