The Precambrian in South Dakota, US

Precambrian in South Dakota map

Choose a time period:


Precambrian Fossils
Fossil photos from Precambrian in South Dakota

Search the fossil gallery

Paleontology and geology

There are two exposures of Precambrian rocks in South Dakota. The Sioux Arch in the eastern part of the state consists of metamorphosed sandstone and claystone deposited in a shallow sea. A particular type of claystone from this area, catlinite, is mined by Native Americans and used to make ceremonial pipes and figurines. The second exposure, the Black Hills in western South Dakota, is an uplifted geological dome consisting of metamorphic rocks up to 2.5 billion years old that formed in the deep past from even older rocks. Due to the metamorphic nature of these Precambrian rocks, no fossils have been found in them.

Links to more on the Precambrian in South Dakota

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.

top Top of List

North Dakota State Map
Minnesota State Map
Iowa State Map
Nebraska State Map
Wyoming State Map
Montana State Map

site tour | about the site | site map | site credits | page credits | help | FAQs | contact
© | editorial policy | awards | teachers' guide | site generator | About RSS

paleontology news:   recent site additions: