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United States Bureau of Mines
行业: Mining
Number of terms: 33118
Number of blossaries: 0
Company Profile:
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 ...
Obsidian with differently colored irregular bands.
Industry:Mining
Obsidian with schiller effect.
Industry:Mining
Obsolete method of winning coal or bedded iron from shallow deposits, in which mineral was extracted and dragged to a central shaft.
Industry:Mining
Obsolete name for reaming shell.
Industry:Mining
Obsolete term for barite, esp., pseudomorphous after anhydrite.
Industry:Mining
Obsolete term for marble.
Industry:Mining
Obsolete type of shaking table.
Industry:Mining
Obtained by the distillation of coal tar. Used in the manufacture of dyestuffs.
Industry:Mining
Occurring as needles or plates intersecting in a gridlike or grill-like manner. Compare: acicular
Industry:Mining
Occurs native, alloyed with gold as electrum, as sulfide argentite, Ag<sub>2</sub>S , proustite, pyrargyrite, and horn silver, AgCl, or cerargyrite. Main source is argentiferous ores of lead, zinc, and copper where it is extracted as a byproduct. Bulk of production is used for coinage, electrical alloys, photographic chemicals, and the arts.
Industry:Mining
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