Lake Huron, the third largest of the Great ... and therefore uses pre-formed organic carbon for growth. Karst formations: Sedimentary carbonate rock (limestone, dolomite) that has been eroded ...
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Archeologists discover 9000-year-old ‘Stonehenge-like’ structure in Lake MichiganDr. John O'Shea from the University of Michigan has studied a rock formation in Lake Huron, dating back 9,000 years. Situated 120 feet below the surface along the Alpena-Amberley Ridge ...
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