Fermanagh’s Fringed Sandwort
Archived: 28 September 2026
About 30,524 BCE, Ireland lay within the volatile Late Pleistocene, not a datable historical year. At Derryvree, County Fermanagh, sediments between glacial tills preserve evidence of an ice-free freshwater wetland sometime between roughly 36,900 and 31,700 cal BP. Fossils indicate tundra vegetation, including fringed sandwort, mosses, sedges and aquatic plants, with insects inhabiting pools and saturated ground. Southern cave collections show that diverse cold-stage mammals, including reindeer, mammoth and predators, reached or inhabited Ireland at varying times. Human presence remains unproven: a possibly butchered reindeer bone is inconclusive. Subsequent ice-sheet expansion buried and preserved this fragile environmental archive for posterity.