Castlepook and Derryvree
Circa 31,901 BCE, Ireland was a cold, seasonally varied Late Pleistocene landscape, not yet wholly covered by the expanding British-Irish Ice Sheet. Derryvree sediments in Fermanagh record open, treeless wetland vegetation, freshwater pools and cold-adapted insects during an ice-free interval, though dates remain broad. Castlepook Cave in Cork preserves mixed remains of mammoth, reindeer, giant deer, hyaena, wolf, Arctic fox and other fauna, accumulated over extended periods and partly modified by carnivores. A possibly butchered reindeer bone suggests fleeting human activity, but no secure settlement evidence exists. Together, the sites document environmental change, ecological connectivity and fragmentary survival of evidence.
View Record
Bogbean Beneath the Tills
About 31,902 BCE cannot be treated as a precise Irish historical year: evidence belongs broadly to Marine Isotope Stage 3, within the later Middle Midlandian. Ireland experienced severe, variable glacial conditions before the ice sheet’s maximum. Derryvree deposits in Fermanagh indicate local ice-free wet tundra, with sparse treeless vegetation, while Castlepook Cave in Cork preserves remains of reindeer, mammoth, giant deer, hyaena and other cold-adapted animals. Lower sea levels altered geography but did not ensure permanent land access. A possibly butchered reindeer bone suggests episodic Upper Palaeolithic visitation, yet remains unconfirmed. No secure evidence supports settlement, institutions, warfare or occupation.
View Record