Mammoth Cave’s Bone Archive
Archived: 20 September 2026
Around 31,023 BCE, Ireland lay within the Midlandian glacial cycle, and evidence describes environments rather than datable events. Derryvree, County Fermanagh, preserves freshwater sediments between till layers, indicating a local ice-free interval with treeless, waterlogged tundra, mosses, insects and short growing seasons. Castlepook Cave, County Cork, contains a long-accumulated, disturbed assemblage of mammoth, reindeer, giant deer, bear, hyena and other cold-stage fauna, demonstrating intermittent links with Britain and Europe. A possible stone-tool mark on a reindeer bone suggests brief human presence, but remains unconfirmed. No evidence supports permanent settlement, society or culture. Changing ice, sea levels and routes governed access.