Castlepook’s Iceward Herds
Archived: 22 September 2026
Around 30,866 BCE, Ireland lay within the unstable Marine Isotope Stage 3, before the Last Glacial Maximum. Evidence cannot describe a single year, but fossil deposits indicate severe, treeless tundra-steppe landscapes with seasonal wetland refuges. Derryvree, County Fermanagh, preserves plants and animals showing sedges, grasses and freshwater habitats amid periglacial conditions. Castlepook Cave, County Cork, yielded mammoth, reindeer, giant deer, predators and cold-adapted fauna, demonstrating links with wider European ecosystems. A marked reindeer bone may indicate early human butchery, but remains inconclusive. Later glaciation and rising seas destroyed much evidence, leaving fragmentary records of ecological survival and transient human presence.