Maguirebridge Under Two Tills
Archived: 17 September 2026
Around 31,507 BCE, Ireland was a climatically unstable Late Pleistocene landscape, not a documented historical year. At Derryvree near Maguiresbridge, freshwater organic sediments between glacial tills preserve pollen, plants and insects indicating treeless, cold wetland with pools, sedges, herbs, mosses and juniper during an ice-free interval. Castlepook Cave in Cork records diverse MIS 3 fauna, including mammoth, reindeer, hyaena and predators, although dates and deposits remain chronologically complex. The British–Irish Ice Sheet expanded unevenly, reshaping habitats and routes. A possibly cut-marked reindeer bone may suggest human visitation, but no settlement evidence exists. Surviving evidence instead documents an uncertain ecological frontier.