BIRM-166’s Tundra Assemblage
Archived: 5 October 2026
Thirty thousand years BCE is not recoverable as a precise Irish historical year, but falls within a broadly dated, unstable Marine Isotope Stage 3 interval. At Derryvree, County Fermanagh, organic freshwater sediments between glacial tills, including BIRM-166, record a treeless tundra wetland during an ice-free phase. Plant and insect remains indicate pools, sedges, mosses and severe periglacial conditions. Speleothems at Crag Cave show episodic milder conditions. Castlepook fossils demonstrate intermittent access by cold-adapted mammals, but cannot provide a contemporary national fauna. No secure evidence establishes human settlement, culture, politics or economy. Later glaciation obscured landscapes, leaving environmental archives not events.