Castlepook’s Striated Femur
Archived: 5 October 2026
About 30,251 BCE, Ireland lay within the climatically unstable later Marine Isotope Stage 3, rather than a precisely recoverable year. Derryvree, County Fermanagh, preserves freshwater sediments between glacial tills, indicating an ice-free interval with open, treeless, wet periglacial vegetation. Castlepook Cave, County Cork, contains a diverse fauna including mammoth, reindeer, giant deer, hyaena and Arctic fox, accumulated across complex periods. A striated reindeer femur may record stone-tool butchery around 33,000 years ago, but disturbed deposits and lack of tools prevent secure proof of human presence. No evidence supports settlement or institutions; environmental change and advancing ice define the period here.