Maguirebridge’s Calibrated Tundra
Archived: 15 September 2026
Around 31,644 BCE, Ireland’s history is reconstructed from environmental evidence rather than a datable event. Derryvree sediments near Maguiresbridge, calibrated to 36,900–31,700 cal BP, show Fermanagh was temporarily ice-free, with freshwater, tundra-like vegetation and severe seasonal conditions. Castlepook Cave preserves remains of reindeer, mammoth, giant deer and other cold-climate animals, although its deposits represent multiple periods and were disturbed. A possibly cut-marked reindeer bone suggests transient Upper Palaeolithic hunters, but permanent settlement remains unproven. Ireland was approaching wider glaciation, which later erased much evidence. Climatic oscillations and advancing ice, not political or cultural events, define this uncertain deep-prehistoric central horizon.