On the Eve of Expansion31801 BCE
Dateline
31,801 BCE is a modern reference year within the Late Pleistocene rather than a precisely dated Irish event. Evidence from glacial deposits, freshwater sediments and cave faunas describes a cold landscape approaching a period of greater ice expansion.
Changing Ireland
Open ground and freshwater environments could still persist locally while the British-Irish Ice Sheet developed across the wider region. The surviving evidence shows a landscape in transition rather than one uniform sheet of ice.
What Survives
Later glaciation erased or buried much of the earlier record, so exact annual reconstruction is impossible. This date is best understood as an archival marker within a broader environmental sequence.
Primary Sources
Research draws on BRITICE-CHRONO, Derryvree studies, Castlepook investigations, National Museum collections, Quaternary science research and radiocarbon calibration evidence.
