Bentonite mining underway in Valley County | Bureau of ...
Nov 13, 2017· Bentonite mining underway in Valley County. (GLASGOW, Mont.) – Millions of Americans need bentonite every day, but many don't even know it. To supply that demand, bentonite mining started in Valley County Nov. 13, 2017, on lands managed by the Bureau of Land Management Glasgow Field Office. Bentonite clay is used for a variety of purposes.