- 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 ...
The original coal plow; a heavy double-ended machine with fixed blades. Its length is 6- 1/2 ft (1.98 m); its height ranges from 14 to 31 in (35.6 to 78.7 cm). The depth of cut can be varied from 2 to 6 in (5.1 to 15.2 cm). The rapid plow has evolved from this relatively slow-moving machine.
Industry:Mining
The original crusher of jaw type. A crusher with one fixed jaw plate and one pivoted at the top so as to give the greatest movement on the smallest lump. Motion is imparted to the lower end of the crushing jaw by toggle joint operated by eccentric. This machine, or some modification of it, is used for reducing run-of-mine ore or coal to a size small enough to be taken by the next crusher in the series during the first stage of crushing.
Industry:Mining
The original mineral deposit on which a mining claim is based. Compare: secondary vein; discovery claim.
Industry:Mining
The original spelling of poikilitic. Now obsolete in American usage, it is still the most accepted European spelling.
Industry:Mining
The original type of water elutriator; it has since been improved.
Industry:Mining
The originally described sequence of strata that constitute a stratigraphic unit. It serves as an objective standard with which spatially separated parts of the unit may be compared, and it is preferably in an area where the unit shows maximum thickness and is completely exposed (or at least shows top and bottom).
Industry:Mining
The orthorhombic mineral, Ca(UO<sub>2</sub>)<sub>4</sub>(AsO<sub>4</sub>)<sub>2</sub>(OH)<sub>4</sub>.6H<sub>2</sub>O ; typically orange-red.
Industry:Mining
The orthorhombic subgroup of amphiboles including anthophyllite, gedrite, and holmquistite. Compare: clinoamphibole
Industry:Mining
The outer limits to which an orebody can be profitably mined, the limiting factor being the metal content of the country rock as determined from assays.
Industry:Mining
