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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 ...
An abbrev. of Witwatersrand, the gold fields in the Republic of South Africa.
Industry:Mining
An abrasive produced by fusing aluminum oxide.
Industry:Mining
An abrasive similar to white alumina except ruby red in color because of the presence of chromic oxide.
Industry:Mining
An abrupt change in the velocity of propagation of seismic waves within the earth, as at an interface.
Industry:Mining
An abrupt change or sharp bend in the course of a borehole.
Industry:Mining
An abrupt change or sharp bend in the course of a borehole.
Industry:Mining
An abrupt chasm, cut, breach, or other sharp opening, such as a craggy fissure in a rock, a wave-cut gully in a cliff, a trench on the ocean bottom, a notch in the rim of a volcanic crater, or a narrow recess in a cave floor. Obsolete syn: clift.
Industry:Mining
An absolute unit of pressure equal to 1 million times the pressure produced on 1 cm<sub>2</sub>by the force of 1 dyn.
Industry:Mining
An absolute-temperature scale in which a measurement interval equals a Fahrenheit degree and in which zero degrees is equal to -459.67 degrees F (-273.16 degrees C). Named for William J.M. Rankine, a Scottish physicist.
Industry:Mining
An accessory for a gemological microscope containing a liquid of high refractive index and designed to eliminate reflections from highly polished facets and thus to expedite the observation of determinative inclusions, growth lines, etc.
Industry:Mining
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