Abstract

Lake Nipissing phase deposits occur between two cultural zones in exposures at the Weber I archeological site along the Cass River in Saginaw County, Michigan. Radiocarbon dates from the lower cultural zone suggest that the Lake Nipissing transgression did not reach an altitude of 180.7 m before about 4600–5000 BP, whereas dates from the upper cultural zone indicate that the lake level was lowered to the 181.3 m Lake Algoma level before about 3000 BP.

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