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United States Bureau of Mines
Industry: 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. A variety of chalcedony of thin concentric layers, which, when cut across, exhibit an iridescence resembling the colors of the rainbow.
Industry:Mining
Eng. A variety of soft marly chalk; Sussex.
Industry:Mining
Eng. A wedge-shaped wood block for supporting machine-cut coal.
Industry:Mining
Eng. A whitish earth found at Thame, Waterperry, and Adwell; mixed with straw, and used for sidewalls and ceilings; a natural mixture of lime and sand, flakes in water (like gypsum) without any heat.
Industry:Mining
Eng. A wooden water pipe used in coffering.
Industry:Mining
Eng. An air crossing fitted with a double door or valve giving direct communication between the two air currents when forced open by the blast of an explosion.
Industry:Mining
Eng. An engine at the mouth of a mine shaft.
Industry:Mining
Eng. An explosion of combustible gases caused by electric current, during a thunderstorm, entering a mine and igniting the gas.
Industry:Mining
Eng. An interior shaft, connecting an upper and lower seam, through which coal is raised or lowered.
Industry:Mining
Eng. Any porous or soft stone, such as the sandstone in the Alston district of Cumberland; tufa.
Industry:Mining