- 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 common name in the older literature for unwelded massive ash and pumice-flow deposits. Trass has been used in the production of pozzolan cement. Compare: ignimbrite.
Industry:Mining
A common nonmetallic halogen element, found in the combined state only, chiefly with sodium as common salt (NaCl). Symbol, Cl. A greenish-yellow irritating toxic gas with a disagreeable odor; a respiratory irritant. Used for producing safe drinking water, paper products, dyestuffs, textiles, petroleum products, medicines, antiseptics, insecticides, foodstuffs, solvents, paints, plastics, and many other consumer products.
Industry:Mining
A common scapolite. A mineral of the scapolite group, intermediate in composition between meionite and marialite.
Industry:Mining
A common scapolite. A mineral of the scapolite group, intermediate in composition between meionite and marialite.
Industry:Mining
A common soil stabilization method in which the soil on the site is first pulverized, then mixed with an admixture or stabilizing agent, compacted and, if necessary, surfaced. All the work is carried out on the site. Compare: plant mix.
Industry:Mining
A common standard configuration used in polarized-light microscopy with the substage polarizing filter (polarizer) permitting plane polarized light with its electric vector in an east-west direction and the above-stage polarizing filter (analyzer) permitting plane polarized light with its electric vector in a north-south direction. Under these conditions all light is absorbed by the two polars. Introduction of any anisotropic transparent material into the light path repolarizes light between the polars so as to generate interference colors and other effects visible in the microscope ocular.
Industry:Mining
A common term for both high duty and super-duty fire clay plastic refractories.
Industry:Mining
A common term for crowbar, lever, or some such article used as a manual aid in moving heavy objects.
Industry:Mining
A common term used on the color scale, generally given as about 1,382 degrees F (750 degrees C).
Industry:Mining
