- 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 ...
A type of topography that is formed on limestone, gypsum, and other rocks by dissolution, and that is characterized by sinkholes, caves, and underground drainage. Etymol. German, from the Yugoslavian territory Krs; type locality, a limestone plateau in the Dinaric Alps of northwestern Yugoslavia and northeastern Italy. First published on a topographic map, Ducatus Carnioliae, in 1774. Adj. karstic.
Industry:Mining
A type of tripod drill operated by compressed air supplied by a portable motor-driven compressor that accompanies the drill.
Industry:Mining
A type of twin found in quartz in which the two crystalline individuals are of opposite kinds, one being right-handed, the other left-handed, with a face of the trigonal prism of the second order as twinning plane. Since one is not derivable from the other by any rotation, there is no twinning axis.
Industry:Mining
A type of twinning in quartz in which the parts of the twin are alternately left- and righthanded. So named because it can be recognized by optical tests in distinction to Dauphine (electrical) twinning. Optical twinning as ordinarily applied includes all twin laws in quartz with the exception of the Dauphine.
Industry:Mining
A type of twinning in quartz in which the parts of the twin are alternately left- and righthanded. So named because it can be recognized by optical tests in distinction to Dauphine (electrical) twinning. Optical twinning as ordinarily applied includes all twin laws in quartz with the exception of the Dauphine.
Industry:Mining
A type of twinning in quartz in which the parts of the twin are alternately left- and righthanded. So named because it can be recognized by optical tests in distinction to Dauphine (electrical) twinning. Optical twinning as ordinarily applied includes all twin laws in quartz with the exception of the Dauphine.
Industry:Mining
A type of twinning in the monoclinic crystal system. The basal pinacoid is the twinning plane.
Industry:Mining
A type of vibrating conveyor having a relatively low frequency and large amplitude of motion.
Industry:Mining
A type of vibrating conveyor having a relatively low frequency and large amplitude of motion.
Industry:Mining
A type of wheel conveyor making use of a series of skate wheels mounted on common shafts or axles or mounted on parallel spaced bars on individual axles.
Industry:Mining
