INDUSTRIAL MINERALS IN MONTANA
2020-10-20 · 1 INDUSTRIAL MINERALS IN MONTANA Richard B. Berg1 and Christopher H. Gammons2 1Montana Bureau of Mines and Geology, Butte, Montana 2Department of Geological Engineering, Montana Technological University, Butte, Montana With a Special Contribution on Talc and Chlorite Deposits by: John F. Childs, Childs Geoscience, Inc., Bozeman, Montana