Derryvree’s Calcareous Silts
Archived: 4 October 2026
30,310 BCE is a label within a MIS 3 chronological range, not a recoverable Irish year. At Derryvree, County Fermanagh, freshwater silts between glacial tills record an ice-free interval before ice burial. Radiocarbon evidence broadly places these deposits within the horizon. Plant remains indicate a cold, open, treeless periglacial landscape of shallow water, mosses, sedges and tundra vegetation. Cave records elsewhere preserve Late Pleistocene fauna, although their dates and contexts differ. Possible butchery marks suggest intermittent human visitation, not settlement. No evidence supports polities, trade or events. Derryvree preserves a fleeting, biologically active freshwater landscape before expanding glaciers reshaped Ireland.