Maguirebridge Beneath Two Tills
Archived: 26 September 2026
Abstract
30,621 BCE is a modern label within a broad calibrated Late Pleistocene range, not a recoverable Irish year. At Derryvree, County Fermanagh, organic wetland sediments between glacial tills indicate a local ice-free interval during Marine Isotope Stage 3. Plant and insect evidence reconstructs cold, open tundra wetlands, rather than forest or permanent snow. Castlepook Cave, County Cork, preserves remains of diverse cold-stage mammals, although its mixed deposits cannot place species together precisely. A cut-marked reindeer femur may indicate human butchery around 31,000 BCE, but does not prove settlement. Evidence reveals environmental change and possible human activity, while precluding social history.