Sioux Quartzite
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The Sioux Quartzite is a Proterozoic quartzite that is found in the region around the intersection of Minnesota, South Dakota, and Iowa, and correlates with other rock units throughout the upper midwe
Sioux Quartzite at Falls Park, Sioux Falls, South Dakota
Cross-bedding in the Sioux Quartzite, Blue Mounds State Park, Minnesota, United States.
The Federal Building in Sioux Falls, South Dakota was constructed with Sioux quartzite from nearby quarries.
Dell Rapids Water Tower, South Dakota
Geology of Minnesota
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The geology of Minnesota comprises the rock, minerals, and soils of the U.S. state of Minnesota, including their formation, development, distribution, and condition.
Shaded relief image: Superior Upland in the northeast, the flat Red River Valley in the northwest, Central Minnesota's irregular landscape, the Coteau des Prairies and Minnesota River in the southwest, and the southeast's dissected Driftless Area along the Mississippi River below its confluences with the Minnesota and St. Croix in East Central Minnesota
Limestone bluffs cut by the Root River in Olmsted County
Limestone over sandstone in the gorge of Minnehaha Creek