Castlepook’s Lone Incision
Archived: 10 September 2026
Abstract
31,830 BCE is a modern label for a climatically unstable phase of MIS 3, not a recoverable Irish calendar year. Ireland was cold, largely treeless and open, with changing ice, lowered seas and uncertain access from Britain. Castlepook Cave in County Cork preserves fauna including reindeer, mammoth, giant deer, hyaena, wolves and lemmings, evidencing a wider north-west European cold-stage ecosystem. Cave deposits are complex and bones may reflect predators, water or natural deaths. A deeply incised reindeer femur, reportedly about 33,000 years old, may record stone-tool butchery, but cannot prove settlement. Expanding ice later erased evidence and profoundly transformed Ireland.