The Precambrian in Iowa, US

Precambrian in Iowa map
 

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Precambrian Fossils
Fossil photos from Precambrian in Iowa

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Paleontology and geology

A 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.

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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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