Frac Sand Sources in the United States - Rock Products. Frac Sand Sources in the United States. Home ; News ... The Van Oser Member is the more suitable of the Jordan subunits in Wisconsin for use as frac sand, as it is coarser grained and higher in silica than the Norwalk Member (Runkel and Steenberg, 2012; Brown, 2014).
Frac Sand Company Stocks Recovering After Huge Industry ... Stock prices for some of Wisconsin's largest frac sand mining companies started to recover this month after dropping more than 90 percent in the last year and a half..