BIRM-166’s Radiocarbon Uncertainty
Archived: 4 October 2026
Around 30,280 BCE, Ireland was a dynamic Late Pleistocene landscape, not a documented historical society. Derryvree, County Fermanagh, preserves organic freshwater deposits between tills, radiocarbon-dated broadly to 34,950–29,750 BCE. Its plants and insects indicate treeless, periglacial tundra wetlands, with sedges, mosses, herbs and shallow water, during an ice-free local interval. Castlepook Cave, County Cork, contains animal remains accumulated over millennia, including reindeer, mammoth, giant deer, predators and cold-adapted small mammals. A marked reindeer femur may indicate human carcass processing, but cannot establish settlement, hunting, community, culture or a precise date. Evidence chiefly reveals changing ice, environments and wildlife in Ireland.