Maguirebridge’s Periglacial Waters
Archived: 28 September 2026
30,530 BCE, Ireland lay within the unstable Marine Isotope Stage 3, before expansion of the British–Irish Ice Sheet. At Derryvree near Maguiresbridge, Fermanagh, silts, sands and sediments between glacial tills preserve secure evidence of wet tundra, pools, cold-tolerant plants and animals. These deposits indicate seasonal periglacial habitats later overwhelmed by advancing ice. Castlepook Cave, County Cork, records cold-stage fauna and possibly human butchery: a marked reindeer bone may show tool use around 33,000 years ago. However, disturbed deposits and absent associated artefacts prevent proof of occupation. Evidence supports environmental reconstruction and brief human visits, not recoverable society or precise dating.