Abstract

A variety of evidence suggests that the borders of the Cary and Mankato drift sheets cross eastern New York and New England, that there were two and perhaps three late Wisconsin marine invasions of the St. Lawrence lowland, and that there exist logical eastern correlatives of the low-water phases in the glacial upper Great Lakes, in the form of till-covered marine deposits, the abandoned, drift-filled Niagara gorge, and the North Bay-Ottawa River lake-outlet channel.

The suggested events from the Gary maximum to the present are assembled in a correlation chart for comparison and criticism. Although the scheme proposed is suggestive only, it is consistent with ecology implied by fossils, with the dates and amplitudes of known crustal movements, and with the radium- and radiocarbon dates of the dated materials collected from the region.

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