Glacial Retreat in the North Bay Area, Ontario

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Science  13 May 1960:
Vol. 131, Issue 3411, pp. 1444-1446
DOI: 10.1126/science.131.3411.1444


Geological and palynological studies in Ontario and Quebec, supported by radiocarbon dates, suggest that the opening of the North Bay outlet and the initiation of the Stanley-Chippewa stages in the Huron and Michigan basins took place 10,000 to 11,000 years ago.