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that occurred around 850 AD and blanketed 340,000 km (130,000 sq mi). While originally believed to only exist within North
America, recent observations (2014) have found crypto-tephra from the eruption across northern Europe.
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deposit found in the southern part of the Yukon
Territory, Canada and eastern Alaska. The deposit is bilobate, formed by two large (
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164:. The Canadian Geomorphology Research Group. Archived from
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