- 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 foreign inclusion in an igneous rock. Compare: autolith; xenocryst.
Industry:Mining
A forge for the direct production of wrought iron, generally used in the United States instead of the Catalan forge, from which it differs in using only finely crushed ore and in working continuously.
Industry:Mining
A forge for the direct production of wrought iron, generally used in the United States instead of the Catalan forge, from which it differs in using only finely crushed ore and in working continuously.
Industry:Mining
A forge in which wrought-iron scrap or refined pig iron is partly melted or welded together by means of a charcoal fire and a blast.
Industry:Mining
A form in foundry work that serves to retain the shape of a core while it is being baked.
Industry:Mining