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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 descriptive term applied to igneous rocks with an orbicular texture in which the nuclei of the orbicules are composed of various kinds of rock or mineral fragments. Compare: crystallothrausmatic; isothrausmatic; homeothrausmatic.
Industry:Mining
A descriptive term for dikes that radiate outward from a center, commonly a volcanic neck or stock.
Industry:Mining
A descriptive term for those changes produced by contact metamorphism in the wall rock of the intrusion; opposite of endomorphic.
Industry:Mining
A designation given to a delay detonator to show its relative or absolute delay time in a given series.
Industry:Mining
A detailed investigation in which the average time taken to do each operation of a complete cycle is recorded.
Industry:Mining
A detergent in which the anion (negative ion) is the active part.
Industry:Mining
A detergent in which the cation is the active part.
Industry:Mining
A deterioration in the crystalline structure and strength of metals due to repeated stresses above a certain critical value.
Industry:Mining
A determination of the concentration of a substance in biological fluids and tissue by analysis of urine, feces, blood, bone, tissue, etc.
Industry:Mining
A determination of the relative hardness of a mineral, such as scratch hardness, as made on a specimen, using appropriate hardness-testing apparatus and techniques.
Industry:Mining