Castlepook Toolmarked Femur
Archived: 4 October 2026
Around 30,276 BCE, Ireland lay within the fluctuating cold conditions of later Marine Isotope Stage 3, before the Last Glacial Maximum. Lower sea levels altered coasts but did not guarantee permanent land connections. At Derryvree, Fermanagh, organic deposits between glacial tills preserve treeless wetlands with sedges, mosses and Arctic-alpine plants, showing intermittent habitable environments. Castlepook Cave, Cork, contains remains of mammoth, reindeer, giant deer, predators and other cold-adapted animals, accumulated over time. A cut-marked reindeer femur may indicate human carcass processing about 33,000 years ago, but cannot prove settlement. Later ice disturbed or buried evidence, leaving an incomplete environmental record.