Derryvree Macrofossil Mosaic
Archived: 29 September 2026
30,481 BCE is a modern label within a broad Late Pleistocene window, not a recoverable Irish calendar year. At Derryvree, County Fermanagh, freshwater silts between glacial tills preserve plants, mosses and insects dated broadly to 36,900–31,700 calibrated BP. They reveal cold, treeless, open periglacial terrain, with pools, wet margins and tundra-like vegetation, before renewed ice advance. Fauna from Castlepook Cave indicates mammals such as reindeer, mammoth and predators, though remains derive from different periods. A cut-marked reindeer bone may indicate fleeting human activity, but sustained settlement is unproven. No political, social or cultural history survives; environmental uncertainty defines this era.