Castlepook’s Earliest Question
Archived: 15 September 2026
Thirty-one thousand six hundred and thirty-six BCE is best treated as an imprecise late MIS 3 interval, not a recoverable Irish calendar year. Derryvree sediments in Fermanagh record cold, treeless freshwater landscapes between glacial advances, while Kerry speleothems show intermittent milder conditions. Altered coastlines, ice margins and sea levels shaped uncertain access to Ireland. Castlepook and other southern caves preserve faunas including reindeer, mammoth and carnivores, although assemblages span long periods and are disturbed. A marked Castlepook reindeer femur may indicate Upper Palaeolithic butchery, but lacks secure context. No settlements, tools, hearths or institutions are evidenced; hunter-gatherer visits remain possible.