- Industry: Mining
- Number of terms: 33118
- Number of blossaries: 0
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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 peach-blossom-red rhombohedral variety of siderite with moderate substitution of cobalt for iron. Also spelled cobaltospharosiderite.
Industry:Mining
A peak or sharply pointed hill or mountain; commonly a volcanic rock. The term is used in desert regions of the Southwestern United States.
Industry:Mining
A pear-shaped steel shell lined with a refractory material containing a number of holes or ports in the bottom or side through which air is blown through the molten pig iron charge. The converter is mounted on trunnions about which it may be tilted to charge or tap. Molten pig iron is charged into the converter, and air is blown through the molten metal to oxidize the impurities, thus making steel.
Industry:Mining
A pear-shaped vessel that resembles the Bessemer converter. It has been largely supplanted by the cylindrical (Peirce-Smith) type converter.
Industry:Mining
A pea-size spherule, usually composed of radiating crystals of plagioclase or pyroxene. This term is generally applied only to such spherical bodies in basic igneous rock, e.g., variolite. Compare: spherulite
Industry:Mining
A peat bog that is either floating or is growing over water-saturated ground, so that it shakes or trembles when walked on. Quagmire is sometimes used as a synonym.
Industry:Mining
A pebble on which facets have been developed by natural agents, such as by wave erosion on a beach or by the grinding action of a glacier. Compare: faceted boulder
Industry:Mining
A peculiar brightening of molten silver, indicating that maximum purity has been attained. Occurs in cupellation.
Industry:Mining
