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Minnesota Geology

General Topics

Finely-laminated lake (or lacustrine) sediment deposited over pebbly sand outwash sediment from an exposure in Kandiyohi County. The field notebook is placed at the contact between the two deposits.

Glacial Geology

Precambrian rock along Highway 1.

Bedrock Geology

Precambrian bedrock lake shoreline.

Geologic Time

Thin section image in cross-polarized light under a microscope.

Rocks and Minerals

Fossil shark tooth, genus Squalicorax, from Cretaceous bedrock drill core in Aitkin County.

Fossils

Moth Spring in Fillmore County. The spring emanates from the lower Cummingsville Formation.

Water

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Geophysics

Niagara Cave in southeastern Minnesota.

Caves and Karst

Earthquake hazard map showing peak ground accelerations having a 2 percent probability of being exceeded in 50 years, for a firm rock site.

Earthquakes

An example of a stone meteorite.

Meteorites

An iron mine along the Mesabi Iron Range.

Mining

Miscellaneous Topics

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Carbon Sequestration

Regional Topics

Bedrock Geology map (Plate 2) of the Olmsted County Geologic Atlas, Part A

County Geologic Atlases

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Geology of Minnesota Parks

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Field Trip Guidebooks

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Regional Hydrogeologic Assessments

Minnesota Geological Survey

2609 Territorial Road, St. Paul MN 55114
612-626-2969
mgs@umn.edu

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