Barite District and the Valles Mines, Washington, Jefferson, and St. Francois Counties, Missouri Scientific...Barite District and the Valles Mines, Washington, Jefferson, and St. Francois Counties, Missouri By Douglas...Barite District and the Valles Mines, Washington, Jefferson, and St. Francois Counties, Missouri: U.S. Geological...Missouri Barite District, Valles Mines, Franklin County Mines, and subdistricts of the Southeast Missouri...Environmental Protection Agency sites in Washington and Jefferson Counties..................................... |