- المجال: 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 ...
An anticline whose crest has been deeply eroded, so that it is flanked by inward-facing erosional scarps. Compare: bald-headed anticline
Industry:Mining
An anticline whose crest has been eroded prior to deposition of an unconformably overlying sedimentary unit. Compare: breached anticline
Industry:Mining
An anticlinelike structure produced by compaction of sediment over a resistant mass, such as a buried hill or reef.
Industry:Mining
An antifriction bearing using very small-diameter rollers between wide faces.
Industry:Mining
An antiknock constituent of gasoline; Pb (C<sub>2</sub>H<sub>5</sub>)<sub>4</sub>.
Industry:Mining
An antimony yellow developed by Fourgeroux de Bondaroy in 1766: 12 parts white lead; 3 parts potassium antimonate; 1 part alum; 1 part sal ammoniac.
Industry:Mining
An apophysis or tongue of an intrusion which is detached from its source. Also spelled epiphesis.
Industry:Mining
An apparatus comprising three tiers of blanket tables, a shaking table, and a mercury riffle for catching gold.
Industry:Mining
An apparatus consisting of a number of thermoelectric couples (as of antimony and bismuth or of copper sulfide and German silver) combined so as to multiply the effect used; (1) to generate electric currents for various purposes, and (2) in a very sensitive form for determining intensities of radiation due esp. to its heating effect.
Industry:Mining
