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  Welcome to the Minnesota Geological Survey

  • Confusion HillVirginia Minnesota
  • ConglomerateNear Rainy Lake
  • Sawtooth RangeGrand Marais
  • Knife RiverAgate
  • Poplar River
  • Pink Zeolite with calcite
  • White Iron LakeEly Minnesota
  • Lake Superior outcropGrand Portage Minnesota
  • Diabase dike
  • Thomsonite
  • White Thomsonite
  • Cobble beachLake Superior
  • Dunka pitBabbitt Minnesota
  • Agate
  • Minnesota iron formation
  • quarry face in Morton gneissMorton Minnesota
  • detail of Morton GneissMorton Minnesota
  • Sioux Quartzite conglomerateNew Ulm Minnesota
  • calyx cores in Morton GneissMorton Minnesota
  • inclusion in Morton GneissMorton Minneosta
  • Weatherd granite outcrops
  • Soudan iron formation
  • State aeromagnetic maparomagnetic survey aircraft
  • Vermilion Granitic ComplexRay Minnesota
  • Jordan Sandstone intraclastsWinona County
  • Jordan Sandstone and Oneota DolomiteWinona County
  • Quartz Sand
  • Minnehaha FallsMinneapolis
  • St. Peter sandstone, Glenwood shale and Platteville limestoneSt. Paul
  • Minnehaha FallsMinneapolis
  • Columnar jointing in intrusive rocksSilver Bay
  • Fractured Ordovician Carbonate RockFillmore County
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The Minnesota Geological Survey is a research and service arm of the Newton Horace Winchell School of Earth Sciences at the University of Minnesota. It investigates the geology of Minnesota and provides basic public information on the geology of the state. The Survey works with state, county, and regional offices to set up geologic data bases and provide technical guidance for water resource planning, land management and mineral exploration policy, energy system development, and other planning and resource management activities.

What's New

  • The latest County Geologic Atlas (C-39) for Washington County is now available on the University's Digital Conservancy here. Print copies are also available through our Map Sales Department.
  • Our newest report, RI-68 Quaternary Lithostratigraphic Units of Minnesota, is now available on the University's Digital Conservancy here.
  • Want to see the actual notebooks of MGS Geologists online? Check them out at our UMedia Archive. You can also find the link to the Media Library on our web page under Minnesota Geology Topics
  • We have moved to a new location! Our new office location is now at 2609 Territorial Rd., St. Paul, MN 55114. Please email us at Email MGS for directions or to discuss your paper map or MGS publication needs.
  • The Search or Browse link under Data and Publications now takes you directly to the University's Digital Conservancy. This search and browse has an updated look and still contains all of the Survey's publications. Enjoy!
  • Earthquakes in Minnesota? You betcha! We are getting our fair shake. Check out the update in our Minnesota at a Glance publication.

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Map Sales: 612-626-2969 - please call or email us to discuss your map or publication needs.
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