Derryvree’s Moss Assemblage
Archived: 21 September 2026
At about 30,962 BCE, Ireland lay within the climatically unstable MIS 3, before the Last Glacial Maximum. Derryvree’s Fermanagh freshwater deposits, sealed between glacial tills, document an interval of cold, largely open tundra and periglacial wetland conditions. Mosses, sedges, grasses and aquatic plants indicate pools, marshes and frost-affected ground, rather than familiar woodland. Crag Cave records episodic milder conditions, while Castlepook’s mixed fauna demonstrates cold-stage habitats supporting large mammals and predators. A possibly tool-marked reindeer bone suggests Upper Palaeolithic human activity, but remains unconfirmed and does not establish settlement. Later ice destroyed or buried much evidence, leaving exceptional environmental archives.