Lake Frontenac
From Infogalactic: the planetary knowledge core
Lake Frontenac was a proglacial lake in the basin of what is now Lake Ontario.[1][2] The sudden influx of fresh water into the Atlantic, as the retreat of the Laurentian Glacier triggered a sudden drop in the lake's water level, may in turn have triggered the onset of the Younger Dryas, 1000-year period of renewed cooling approximately 12000 years ago.
See also
References
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