- 行业: 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 structure in which one constituent occurs primarily at the grain boundaries, thus partially or completely enveloping the grains of the other constituent.
Industry:Mining
A structure in which one constituent occurs primarily at the grain boundaries, thus partially or completely enveloping the grains of the other constituent.
Industry:Mining
A structure in which the load-bearing members are arranged in such a way that the weights and forces are transmitted to the foundations by the cheapest means consistent with safety and permanency.
Industry:Mining
A structure of igneous rocks that is esp. common in silicic lava flows. It results from movement or flow, and is an alternation of mineralogically unlike layers.
Industry:Mining
A structure of vein fillings resulting from a succession, often a rhythmic deposition, of crusts of unlike minerals on the walls of an open space.
Industry:Mining
A structure or texture found in a number of chromite occurrences, consisting of a series of connected chromite crystals somewhat resembling a chain.
Industry:Mining
A structure produced by sediment trapping and/or precipitation as a result of the growth of cyanophytes (blue-green algae). It has a variety of gross forms, from nearly horizontal to markedly columnar, domal, or subspherical.
Industry:Mining
A structure produced by sediment trapping and/or precipitation as a result of the growth of cyanophytes (blue-green algae). It has a variety of gross forms, from nearly horizontal to markedly columnar, domal, or subspherical.
Industry:Mining
A structure produced by sediment trapping and/or precipitation as a result of the growth of cyanophytes (blue-green algae). It has a variety of gross forms, from nearly horizontal to markedly columnar, domal, or subspherical.
Industry:Mining
