Meet Matt Graesch- DNR Environmental Specialist
Matt has a bachelors and masters in Geology and serves as a senior environmental specialist for the IA DNR. He has had a lifelong interest in geology specifically as it relates to Iowa’s vast landscapes. Matt has published multiple research papers and led many projects related to water supplies, PFAS chemicals, and pollution control.
Data Set, Graph, Learning Tools
Iowa rocks are all either Paleozoic (no Permian) or Cretaceous with the two tiny exceptions of the Fort Dodge Gypsum (Jurassic) and the Sioux Quartzite (Pre-Cambrian).
This map shows what you’d see if you removed all the soil and glacial materials on top of the bedrock.
This graphic shows a geological cross section of the state of Iowa if you cut from the NE corner to the SW corner of the state down 3000 feet. It reveals the various types of layers in our great state.
The oldest exposed sedimentary rocks in Iowa are the Wonewoc sandstone near New Albin, Iowa.
Geology plays an important role, because it helps us understand the Earth's history, predict natural disasters, manage natural resources, and address environmental challenges. Iowa has tremendous geological opportunities. Check out some of the locations highlighted below where you can see and experience Iowa’s geological story.
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For more information or questions, please contact [email protected]