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Date: 2016-06-20 07:41:09Economic geology Oxide minerals Geology of Minnesota Ilmenite Spinel group Titanium dioxide Ore Titanium Natural Resources Research Institute Duluth Complex Magnetite Placer deposit | Explore Minnesota - TitaniumAdd to Reading ListSource URL: files.dnr.state.mn.usDownload Document from Source WebsiteFile Size: 810,92 KBShare Document on Facebook |