HOW VALUABLE IS SILICA SAND TO THE ECONOMY OF THE STATE?
Illinois is a major producer of silica sand, having produced 2,900,000 tons in 1963. The silica sand and ground silica produced in the same year was valued at $11,400,000.
Illinois is a major producer of silica sand, having produced 2,900,000 tons in 1963. The silica sand and ground silica produced in the same year was valued at $11,400,000.