- Industry: Mining
- Number of terms: 33118
- Number of blossaries: 0
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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 name for the pyroxene series clinoenstatite and clinohypersthene. Compare: enstenite
Industry:Mining
A name generally applied to all salic extrusive and hypabyssal rocks characterized by the presence of albite or albite-oligoclase and chlorite, epidote, and calcite, generally of secondary origin. Some varieties of keratophyre contain sodic orthoclase, sodic amphiboles, and pyroxenes. Keratophyres commonly are associated with spilitic rocks and interbedded with marine sediments.
Industry:Mining
A name given by prospectors and miners to a fine-grained igneous rock having small phenocrysts, particularly if they are quartz, from a fancied resemblance to birds' eyes.
Industry:Mining
A name given to (1) a mixture of wollastonite, quartz, and feldspar from Edelfors, Sweden; (2) impure wollastonite from Giellebak, Sweden (called also gillebackit); and (3) impure laumontite, under the impression that they were new minerals.
Industry:Mining
A name given to (1) a mixture of wollastonite, quartz, and feldspar from Edelfors, Sweden; (2) impure wollastonite from Giellebak, Sweden (called also gillebackit); and (3) impure laumontite, under the impression that they were new minerals.
Industry:Mining
A name given to a mass of raw quartz, either faced or rough, as found in nature.
Industry:Mining
A name given to a mass of raw quartz, either faced or rough, as found in nature.
Industry:Mining
A name given to a particular type of electric safety hand lamp used in rescue operations. It is equipped with a lens for concentrating or diffusing the light beam as occasion may require.
Industry:Mining
A name given to defaced masses of raw quartz used in the oscillator industry.
Industry:Mining
