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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 ...
Ponds occupying depressions along active faults, owing to uneven settling of the ground.
Industry:Mining
Porosity developed after the formation of a deposit and resulting from subsequent fracturing, replacement, solution, or weathering.
Industry:Mining
Porosity resulting from the presence of openings produced by the breaking or shattering of an otherwise less pervious rock.
Industry:Mining
Porosity visible only with the aid of a microscope.
Industry:Mining
Porosity visible without the aid of a microscope, such as pipes and blowholes in ingots.
Industry:Mining
Porphyry containing olivine phenocrysts.
Industry:Mining
Port roof of a tank.
Industry:Mining
Port. Mine boss.
Industry:Mining
Portable or semiportable pumps that are required when water is encountered while opening a new mine, for extending headings or entries in an operating mine, for pumprooms or rib sections lying in the dip, for collecting water from local pools, or for sinking a shaft. They discharge water at an intermediate pumping station or into a drainage ditch or tunnel carrying water outside a mine.
Industry:Mining
Portable rail crossing used to transfer wagons from one track to another.
Industry:Mining
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