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United States Bureau of Mines
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 ...
Eng. Universally applied to the lowest bed in a quarry. Also used in Southeast England for the basal bed of the Tertiary, whether Thanet sand or Reading beds, resting on an eroded surface of the Chalk.
Industry:Mining
Eng. Usually applied to sandstone (not a freestone) in the Carboniferous Limestone Series of Cumberland. Sometimes applied to a dolomite, limestone, or shale.
Industry:Mining
Eng. Very hard underclay (clunch) with interbeds of sand.
Industry:Mining
Eng. Widened; said of the enlarged portion of a shaft at the landing for running the cars past the shaft, and for caging.
Industry:Mining
Eng. Winding rope; a hoisting rope.
Industry:Mining
Eng. Words marked upon the scale of a mercurial barometer to indicate when considerable combustible gases may be expected to be given off in the mine, and to show that extra vigilance is required to keep the ventilation up to its full strength.
Industry:Mining
Eng.; Scot. A shaft used entirely for pumping purposes.
Industry:Mining
Eng.; Scot. Ore sludge; ore slime. A variation of smeddum.
Industry:Mining
Enlarging a heading or drift.
Industry:Mining
Enrichment of a deposit by replacement of one sulfide by another of high value, as pyrite by chalcocite.
Industry:Mining
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