- Industry: 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 ...
Any porphyritic igneous rock having a glassy groundmass. Adj: vitrophyric. Compare: felsophyre; granophyre.
Industry:Mining
Any porphyritic igneous rock having a glassy groundmass. Adj: vitrophyric. Compare: felsophyre; granophyre.
Industry:Mining
Any portion of the universe that can be isolated completely and arbitrarily from the rest for consideration of the changes that may occur within it under varied conditions. In a closed system, energy may cross the system boundary, but matter may not. In an open system, both energy and matter may enter or leave as required. An equilibrium system is closed with all phases in their lowest energy states. The variance (degrees of freedom) of an equilibrium system is its number of components minus its number of phases plus two. A steady-state system is open with all phases in their lowest energy states while matter streams through it. Systems may be described by the number of their components; 2308 e.g., unary for one component, binary for two, ternary for three, etc. They are commonly defined in terms of their components; e.g., the system CaO-MgO-SiO<sub>2</sub>-H<sub>2</sub>O is a quaternary system.
Industry:Mining
Any powder or solid substance that when heated or struck explodes with violence and a loud report.
Industry:Mining
Any process by which the output of a detector-amplifier system is recorded on a magnetic recording medium. The advantages of such a system are that the resulting records may be played back and converted into conventional records with phase shifting, mixing, etc., between traces and with filtering variations. Most modern magnetic recording is in digital form.
Industry:Mining
Any process for making potable water from sea water or other saline waters. Distillation is the oldest method. Others involve electrodialysis, freezing, extraction, and ion exchange.
Industry:Mining
Any process for making potable water from sea water or other saline waters. Distillation is the oldest method. Others involve electrodialysis, freezing, extraction, and ion exchange.
Industry:Mining
Any product of the Bessemer process, such as Bessemer steel, iron, etc.; named from Henry Bessemer, who patented the process in 1855; used also attributively as Bessemer converter, flame, or method.
Industry:Mining
Any protozoan belonging to the subclass Sarcodina, order Foraminifera, characterized by the presence of a test (shell) of one to many chambers composed of secreted calcite (rarely silica or aragonite) or of agglutinated particles. Most foraminifers are marine but freshwater forms are known. They are important microfossils in well logging. Range, Cambrian to present.
Industry:Mining
