- المجال: Mining
- Number of terms: 33118
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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 sandstone containing rock fragments in greater abundance than feldspar grains.
Industry:Mining
A sandstone containing rock fragments in greater abundance than feldspar grains.
Industry:Mining
A sandstone containing sufficient grains of glauconite to impart a marked greenish color to the rock; greensand.
Industry:Mining
A sandstone that breaks or cuts as readily in one direction as in another and that can be worked without being affected by stratification; a dense freestone that lacks natural division planes.
Industry:Mining
A sandstone that does not have enough feldspar to be classed as an arkose, or a sandstone that is intermediate in composition between arkose and pure quartz sandstone. Compare: arkose
Industry:Mining
A sandstone with considerable feldspar, such as one containing minerals derived from coarse-grained quartzo-feldspathic rocks (granite, granodiorite, gneiss) or from highly feldspathic sedimentary rocks; specif. a sandstone containing more than 25% feldspar and less than 20% matrix material of clay, sericite, and chlorite.
Industry:Mining
A satellite-based navigational system permitting the determination of any point on the Earth with high accuracy. Abbrev: GPS. GPS is used in mapping, mineral exploration, and GIS data collection. The systems depend on the Navigation Satellite Timing and Ranging (NAVSTAR) GPS developed and operated by the U.S. Department of Defense, which consists of a network of 25 satellites in orbit about the Earth as well as ground operations support. After all the satellites are deployed, GPS will provide all-weather, worldwide, two- and three-dimensional (latitude, longitude, and elevation) positioning capabilities over a 24-h period.
Industry:Mining
A saw consisting of one- and three-strand wire cables up to 16,000 ft (4.9 km) long running over pulleys. When fed by a slurry of sand and water and held against rock by tension, the saw cuts narrow, uniform channels by abrasion. This saw is used for cutting granite, slate, marble, limestone, or sandstone blocks.
Industry:Mining
