Mining silica sand in wisconsinMining silica sand in wisconsin. - P. (CSP) from building a silica sand . . . Welcome to the premier industrial source for Silica Sand in Wisconsin. . Target: Those opposed to silica sand mining and hydraulic fracturing; Sponsored by . . . gravel mining Silica sand . . . . sandstone formation known as the Sylvania Sandstone located at or near the surface in Wayne and Monroe counties contains high silica, uncontaminated sand grains. Stop Silica/Frac Mine in Blair,... more