Castlepook’s Earliest Claim
Archived: 19 September 2026
Abstract
Around 31,165 BCE, Ireland was a climatically unstable Late Pleistocene landmass, not a defined island or society. Derryvree, County Fermanagh, preserves tundra wetland sediments, broadly dated to this period, showing locally ice-free ground between glacial advances. Castlepook Cave, County Cork, contains a long, disturbed assemblage of Ice Age fauna, including reindeer, mammoth, giant deer, bear and hyaena. A marked reindeer femur, roughly 33,000 years old, may indicate stone-tool butchery and Ireland’s earliest human presence. However, it dates the animal rather than the incision, and no associated settlement evidence exists. Lower seas altered routes, while later glaciation destroyed much surviving evidence.