- 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 ...
A signal that is recorded on a seismogram later than the first arrival of energy.
Industry:Mining
A signaling system that operates between the surface lamp room and the underground office, indicating the workers in attendance at the beginning of the shift.
Industry:Mining
A silent-shift transmission construction in which hub speeds are synchronized before engagement by contact of leather cones.
Industry:Mining
A Silesian zinc-distillation furnace employing the Siemens system of heat recuperation.
Industry:Mining
A silica brick having harmless areas of dark cream to reddish brown.
Industry:Mining
A silica rock having the superficial appearance of a true ganister but characterized by more interstitial matter, a greater variability of texture, and often an incomplete secondary silicification.
Industry:Mining
A silica-oversaturated (quartz-normative) basalt, characterized by the presence of lowcalcium pyroxenes (orthopyroxene and/or pigeonite) in addition to clinopyroxene and calcic plagioclase. Olivine may be present in the mode, but neither olivine nor nepheline appear in the norm. Compare: basalt
Industry:Mining
A silicate of aluminum and barium, BaAl<sub>2</sub>Si<sub>2</sub>O<sub>8</sub>. An artificial feldspar, similar to anorthite, but containing barium instead of calcium. Hexagonal prisms. Uniaxial, negative.
Industry:Mining
