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Start Over You searched for: Subject Devonian Geologic Period Remove constraint Subject: Devonian Geologic Period Spatial Coverage Lower Peninsula Remove constraint Spatial Coverage: Lower Peninsula

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1951. 2018-01-23T15:55:42Z. 2018-01-23T15:55:42Z. Cohee, George Vincent, 1907-. U.S. Dept. of the Interior, Geological Survey. English. cartographic image. Public. Lower Peninsula (Mich.), Michigan, Lower Peninsula, and Lower Peninsula. Devonian, Carboniferous, and From 280 to 405 million years ago.