Articles from April 2021
![Coal](/sites/iowageologicalsurvey.uiowa.edu/files/styles/widescreen__1024_x_576/public/2023-01/coal-495x400.jpg?h=b8944338&itok=kc0eoOGX)
Assessing Iowa's critical mineral potential
Thursday, April 8, 2021
The IGS partnered with more than a dozen other state surveys on two projects to assess the geochemistry of selected Pennsylvanian and Devonian bedrock formations.