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Click here for digital edition  At left: A map of the submerged Mackinac Valley taken from the book "Prehistoric Mackinac Island," written by George M. Stanley, Ph.D., published by the University of Michigan in 1945.  |
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Click here for digital edition At left: A map of the submerged Mackinac Valley taken from the book "Prehistoric Mackinac Island," written by George M. Stanley, Ph.D., published by the University of Michigan in 1945. |
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