Author: Minnesota Geological Survey / Access: Public - Yale University Library GeoBlacklight Search Results

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1. Geologic and hydrologic aspects of tunneling in the Twin Cities area, Minnesota [cartographic material]

1979. 2014-09-10T20:08:28Z. 2014-09-23T22:10:35Z. Minnesota Geological Survey. Dept. of the Interior, U.S. Geological Survey. English. Public. Minnesota, Minneapolis, and Saint Paul.

2. Geologic map of the state of Minnesota [cartographic material]

1932. 2018-05-29T18:25:19Z. 2020-10-15T22:41:41Z. Minnesota Geological Survey. Minnesota Geological Survey. English. cartographic image. Public. Minnesota and Minnesota.