Maguirebridge’s Intertill Basin
Archived: 23 September 2026
Abstract
30,818 BCE is a modern label within late Marine Isotope Stage 3, not a recoverable Irish historical year. At Derryvree near Maguiresbridge, County Fermanagh, a road cutting exposed freshwater and organic deposits between glacial tills, indicating a temporary ice-free, cold wetland with pools, mosses, sedges and aquatic plants before renewed glaciation. Radiocarbon evidence provides only a broad calibrated range, not annual conditions. Cave deposits at Castlepook, County Cork, indicate cold-stage fauna, including reindeer and hyena, but are chronologically complex. A marked reindeer femur may suggest human butchery, yet proves neither settlement nor population. Climate, ice and animals shaped Ireland’s record.