Derryvree’s Lower Till
Archived: 4 October 2026
Abstract
30,290 BCE is a modern label within a broad Late Pleistocene interval, not a datable Irish year. Derryvree, County Fermanagh, preserves freshwater sediments between two tills, indicating an ice-free wetland episode amid changing glaciation. Its plants, pollen and fauna depict treeless, periglacial tundra with shallow water and productive summer vegetation. Ireland was a varied mosaic of ice, open ground and altered coastlines, without proven land routes. Castlepook and Shandon caves record cold-stage mammals, including mammoth, reindeer and predators. A marked reindeer bone may suggest human butchery, yet no permanent population is established. Environmental uncertainty defines this prehistoric Ireland in evidence.