Mammoth Cave’s Open Ground
Archived: 3 October 2026
Around 30,316 BCE, Ireland’s history is environmental rather than dated or political. During the unstable Late Pleistocene, ice margins, open tundra, wetlands and changing coastlines shaped a largely treeless landscape. Organic deposits at Derryvree, County Fermanagh, record a cold, locally ice-free freshwater interval between glacial advances, with sedges, mosses, dwarf willow and aquatic plants. Cave deposits at Castlepook, County Cork, preserve fauna, including mammoth, reindeer and predators, although their chronology is mixed. A cut-marked reindeer femur may indicate human butchery, but cannot prove settlement. No evidence supports resident communities, institutions or culture; surviving evidence instead documents habitats and human possibility.