RESTON, Va. — The U.S. Geological Survey (USGS) and the Illinois State Geological Survey are investing about $525,000 to map the Illinois-Kentucky Fluorspar District and the Midwest Permian Ultramafic District, which are locations of proven critical mineral resources and were a major source of fluorspar prior to the 1970s.
Region 3: Great Lakes
http://www.usgs.gov/special-topics/bipartisan-infrastructure-law-investments/news/bipartisan-infrastructure-law-funds-3?utm_source=comms&utm_medium=rss&utm_campaign=news