Cut-Marked Reindeer Bone
Castlepook Cave, County Cork, contains a reindeer femur reportedly cut with a stone tool about 31,000 BC, potentially Ireland’s earliest evidence of human activity. The date is approximate, and disturbed cave deposits, lacking associated tools, hearths or settlements, prevent firm conclusions beyond a possible brief hunter visit. During Marine Isotope Stage 3, Ireland was cold, seasonal and variably glaciated, supporting open habitats and fauna including reindeer, mammoth, giant deer, bears, wolves and hyaenas. Low sea levels may have aided access, though routes remain unknown. Later glaciation probably destroyed evidence. The find suggests mobile hunter-gatherers, not permanent occupation, culture or organisation.
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Castlepook Cave Fauna
Around 32,000 BCE, Ireland lay within the Late Pleistocene, before the British–Irish Ice Sheet reached its maximum extent. Lower sea levels altered coasts, but any land connection to Britain or Europe remains uncertain. Conditions varied regionally, though open, cold steppe-tundra supported reindeer, mammoth, giant deer, bears, wolves, Arctic foxes and fauna. Castlepook Cave, County Cork, preserves animal remains and a reindeer bone possibly bearing stone-tool butchery marks. This tentative evidence may indicate human activity, not settlement. Later glaciation destroyed or buried landscapes, complicating interpretation. Evidence of people in Ireland dates to about 10,860–10,640 BCE, leaving this earlier period archaeologically uncertain.
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