Bogbean Before the Ice Return
Archived: 24 September 2026
At 30,759 BCE, Ireland cannot be described through precise annual history, but evidence places it within a cold, unstable MIS 3 landscape. Derryvree, County Fermanagh, preserves freshwater sediments between glacial tills, dated broadly to 34,950–29,750 BCE. Its mosses, sedges, bogbean and other fossils indicate treeless, periglacial wetland conditions with seasonal thaw, rather than continuous ice cover. Castlepook Cave, County Cork, preserves remains of cold-adapted animals, including reindeer, mammoth and predators, accumulated across several periods. A marked reindeer femur may indicate human butchery around 33,000 years ago, but cannot demonstrate permanent settlement. Ireland’s history then is ecological, with human presence uncertain.