Lakes dammed by ice will commonly spill in catastrophic outbursts. Lake Agassiz-Ojibway, at the margin of the Laurentide ice sheet, burst 8,470 years ago in a subglacial flood whose marks have been scratched into the seafloor of Hudson Bay.
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Jakobsson, M. The last stampede of a glacial lake. Nature Geosci 1, 152–153 (2008). https://doi.org/10.1038/ngeo147
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DOI: https://doi.org/10.1038/ngeo147
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