Browse TRAIL Inventories

Exploration of the Moffet-Johnston copper property, Madison County, Montana

Investigation of the Hornsilver lead-zinc property, Butte County, Idaho

Investigation of Running Wolf iron deposits, Judith Basin County, Mont.

Investigation of copper-nickel deposits of the Stillwater Complex, Stillwater and Sweetgrass Counties, Mont.

Mines and Mineral Deposits (Except Fuels) Meagher County, Montana

Investigation of the combination silver-tungsten mine, Granite County, Mont.

Mineral Resources of Upper Missouri River Basin, Montana: Fort Peck Reservoir to Morony Dam


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