- 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 wave that advances by alternate compression and rarefaction of a medium, causing a particle in its path to move forward and backward along the direction of the wave's advance. In connection with waves in the Earth, also known as primary wave, compressional wave, longitudinal wave, or P-wave.
Industry:Mining
A wave that advances by causing particles in its path to move from side to side or up and down at right angles to the direction of the wave's advance, a shake motion.
Industry:Mining
A wave that is propagated backward through the burned gas as the result of an explosion wave being completely or partly arrested against the closed extremity, or in a constricted portion of its path, as in a tube, gallery, etc.
Industry:Mining
A wavelike pattern of parallel grooves and ridges, measuring as much as several feet from crest to crest, and formed on a folded surface or along a fault surface. Compare: slickensides
Industry:Mining
A wax near ozocerite but elastic like caoutchouc; yellow; sp gr, 0.915. It occurs at Ropa in Galicia.
Industry:Mining
A waxlike resin from Kaluga, Russ, which resembles compact turf. Also spelled alexjejevite.
Industry:Mining
A weak lath frame, surrounding a main crib, the space between being for the insertion of piles.
Industry:Mining
