Maguirebridge’s Fossil Wetland
Archived: 16 September 2026
31,582 BCE is a modern label within an MIS 3 chronological range, not a datable Irish event. At Derryvree, County Fermanagh, freshwater sediments beneath glacial tills record an ice-free, periglacial tundra of wetlands, mosses, grasses and herbs, later overridden by advancing ice. Castlepook Cave, County Cork, preserves a mixed, long-accumulated fauna including mammoth, reindeer, giant deer, predators and cold-adapted small mammals, demonstrating Ice Age habitats. A marked reindeer femur may indicate stone-tool processing by people, but cannot prove settlement or sustained occupation. No evidence establishes later-style institutions. These sites reveal a dynamic, cold landscape before extensive Last Glacial Maximum ice.