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United States Bureau of Mines
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 ...
A metamorphic dolomite, or dolomite marble.
Industry:Mining
A metamorphic rock characterized by recrystallized minerals occurring as augen or lenticles parallel to and alternating with schistose streaks.
Industry:Mining
A metamorphic rock composed almost entirely of kyanite (disthene) and some quartz, often associated with magnetiferous quartzite and amphibolite.
Industry:Mining
A metamorphic rock composed of cordierite, quartz, garnet, tourmaline, and kyanite.
Industry:Mining
A metamorphic rock consisting chiefly of an aggregate of interlocking garnet grains. Compare: tactite
Industry:Mining
A metamorphic rock consisting mainly of calcium-bearing silicates, such as diopside and wollastonite, and formed by metamorphism of impure limestone or dolomite; associated with skarn-type mineral deposits.
Industry:Mining
A metamorphic rock consisting mainly of calcium-bearing silicates, such as diopside and wollastonite, and formed by metamorphism of impure limestone or dolomite; associated with skarn-type mineral deposits.
Industry:Mining
A metamorphic rock consisting of epidote and quartz, and generally containing other secondary minerals such as uralite and chlorite.
Industry:Mining
A metamorphic rock consisting principally of jadeite, commonly associated with small amounts of feldspar or feldspathoids. It is probably derived from an alkali-rich igneous rock by high-pressure metamorphism.
Industry:Mining
A metamorphic rock in which porphyroblastic crystals of amphibole (usually hornblende) tend to form stellate or sheaflike groups on the planes of foliation or schistosity. Compare: amphibolite
Industry:Mining
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