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2015. Minnesota Department of Natural Resources. Bedrock geology polygons as digitized from the'1987 Michigan Bedrock Geology map.
2015. Michigan bedrock geology.
2015. Michigan Quaternary Geology.
2020. Digital version of Quaternary Geology maps of northern and southern Michigan.
2016. Access Oakland. This polygon feature class represents the spatial extent of surficial geology deposits, glacial and sub-glacial drainage, and historical glacial la...