- 行业: Mining
- Number of terms: 33118
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The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
A place where ores are washed and separated from the waste; usually applied to places where the hand jigs are used.
Industry:Mining
A place where uranium mineralization has been trapped at a mudstone-sandstone interface.
Industry:Mining
A placer deposit on a present or ancient sea beach. There may be a series of paleo-beach placers owing to changes of shoreline.
Industry:Mining
A placer deposit on a present or ancient sea beach. There may be a series of paleo-beach placers owing to changes of shoreline.
Industry:Mining
A placer location made by an association of persons in one location covering 160 acres (64 ha) is not eight locations covering 20 acres (8 ha) each. It is in law a single location, and as such a single discovery is sufficient to support such a location; the only assessment work required is as for a single claim.
Industry:Mining
A plagioclase glass in some chondrites and irons formed by preterrestrial impact between meteorites in space.
Industry:Mining