Crag Cave Speleothem Growth
Archived: 3 October 2026
About 30,338 BCE, Ireland lay within the unstable Late Pleistocene, not a precisely recoverable calendar year. Derryvree, County Fermanagh, preserves freshwater wetland sediments dated broadly to this period, indicating open, cold, treeless terrain of sedges, mosses, pools and tundra plants. Episodic calcite growth in County Kerry’s Crag Cave shows that southwest Ireland periodically retained circulating water during milder phases. Advancing ice later buried or destroyed landscapes, while Castlepook Cave fauna records mammoth, reindeer and carnivores. A marked reindeer bone may indicate human processing, but proves neither settlement nor culture. Evidence supports a regionally varied Ice Age environment, not year-specific events.