- Industry: Mining
- Number of terms: 33118
- Number of blossaries: 0
- Company Profile:
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 ...
Ferruginous rock containing one or more minerals from which metallic iron may be profitably extracted. The chief ores of iron consist mainly of the oxides: hematite, Fe<sub>2</sub>O<sub>3</sub>; goethite, alpha -FeO(OH); magnetite, Fe<sub>3</sub>O<sub>4</sub>; and the carbonate, siderite or chalybite, FeCO<sub>3</sub>.
Industry:Mining
Crystalline quartz with a rose pink color, due probably to titanium in minute quantity. The color is destroyed by exposure to strong sunlight. Used as a gem or an ornamental stone.
Industry:Mining
In gassy mines, a lamp of an approved type, which is relatively safe to use in atmospheres that may contain flammable gas. Latterly, the term tends to be restricted to naptha-fueled safety lamps, which are issued to mine inspection personnel and used for combustible gas tests.
Industry:Mining
N. of Eng. Ore mixed with veinstone; second-class ore that must undergo further preparation before going to the smelter.
Industry:Mining
Pennsylvania. A system of working anthracite coal by bords 10 yd (9.1 m) in width, with narrow pillars 5 yd (4.6 m) wide between them, holed through at certain intervals. The breasts are worked from the dip to the rise.
Industry:Mining
Funnel-shaped fireclay piece used in the bottom-pour ingot assembly to lead metal to the fountain brick.
Industry:Mining
Copper obtained by roasting and refining the metal bottoms that collect under the regulus in smelting certain impure ores; usually cast in flat, rectangular plates, hence its name.
Industry:Mining
Features produced in beds that have been disrupted and separated during soft-sediment deformation.
Industry:Mining
Hard calcareous or siliceous nodules of irregular shape, found in the shales and underclays of the Coal Measures.
Industry:Mining
