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Paleontology and geologyA small amount of Precambrian rock is exposed in the northwest corner of Iowa in Gitchie Manitou State Preserve. These reddish-colored rocks are the1.6-billion-year-old Sioux Quartzite, a metamorphic rock formed from nearly pure quartz sandstone. Other Precambrian-age rocks elsewhere across the state lie deeply buried beneath thousands of feet of sedimentary rocks. No fossils are known from these Precambrian rocks. |
Links to more on the Precambrian in Iowa |
Research and Collections
Research and Collections
Ongoing Research Projects (showing 1 of 1 listings)
Big Sioux River: Descriptions, photos and maps showing the Big Sioux River geology, origin, flora and fauna, with emphasis on Sioux Quartzite formations.
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