- 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 ...
Limestone, quicklime, hydrated lime, and cement dusts fall in this class. These dusts are more or less soluble in the body fluids, and are eventually absorbed.
Industry:Mining
Limonite in the gangue around and adjoining a cavity or a group of cavities formerly occupied by iron-bearing sulfide.
Industry:Mining
Limonite or brown iron ore. A local name applied in Virginia to the low-grade siliceous variety, which commonly occurs in hard lumps and is found on the mountain slopes at or near the contact of the Cambrian shale and sandstone with the Cambro-Ordovician limestone. Compare: valley brown ore
Industry:Mining
Limonite precipitated in rock that did not formerly contain any iron-bearing sulfide. Compare: indigenous limonite
Industry:Mining
LiNbO<sub>3</sub>; a ferroelectric compound having the ilmenite structure and of potential interest as an electroceramic.
Industry:Mining
Line of demarcation between fairly clear supernatant water and settling solids in a thickener or other sedimentation vessel.
Industry:Mining
Line on the Earth's surface connecting points where the seismic wave arrives, generated by an earthquake, at the same time.
Industry:Mining
