10 cm thick. 2 to 3.5 m below woody, organic-rich silt and peat that host abundant large stumps and logs. It occurs as pods and lenses offset by centimetre-scale faults within massive, grey silt. Located 25 to 30 m above Yukon River.
Old Crow tephra across eastern Beringia: a single cataclysmic eruption at the close of Marine Isotope Stage 6
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