Derryvree’s 1969 Exposure
Archived: 7 October 2026
At approximately 30,162 BCE, Ireland lay within the cold conditions of Marine Isotope Stage 3, although no precise calendar dating is possible. Roadworks at Derryvree, County Fermanagh, exposed a freshwater organic layer between glacial tills, showing a tundra wetland persisted between ice advances. Its flora indicates treeless, waterlogged, periglacial terrain. Castlepook Cave, County Cork, preserves a mixed, poorly dated assemblage including mammoth, reindeer and carnivores, demonstrating intermittent cold-stage animal habitats. A possibly cut-marked reindeer bone suggests, but cannot confirm, early human visitation. Evidence reveals dynamic regional environments, changed coastlines and uncertain ice extent, rather than settlement, society or continuous glaciation.