- 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 ...
An inclusive term for a wide variety of hard, brittle, semitransparent, yellowish to red fossil resins from various tropical trees (e.g., Copiafera and Agathis), being nearly insoluble in the ordinary solvents and resembling amber in appearance; e.g., Congo copal and kauri. Copal also occurs as modern resinous exudations.
Industry:Mining
An inclusive term for all volcanic subsidence structures regardless of shape or size, depth of erosion, or connection with the surface. The term thus includes cauldron subsidences, in the classical sense, and collapse calderas.
Industry:Mining
An incompetent or hydrating shale that runs, falls, swells, or squeezes into a borehole.
Industry:Mining
An incorrect name for the fiery-red garnet (pyrope) crystals obtained from Colorado.
Industry:Mining
An increase in density occurring when the contents of two pipes carrying water with different temperature and salinity characteristics, but having the same density, are mixed; the resulting fluid mixture is slightly more dense than either of the two original types.
Industry:Mining
An increase in the bulk volume of a granular mass during deformation, caused by a change from close-packed structure to open-packed structure, accompanied by an increase in the pore volume. The latter is accompanied by rotation of grains, microfracturing, and grain boundary slippage.
Industry:Mining
An indentation hardness testing machine by which measurements are obtained by the pressure required to indent a specimen with a diamond 5/8 mm in diameter, the depth of indentation remaining constant.
Industry:Mining
An indention hardness test employing a 136 degrees diamond-pyramid indenter and variable loads enabling the use of one hardness scale for all ranges of hardness from very soft lead to tungsten carbide.
Industry:Mining
An index devised by the Medical Research Council of Great Britain which is based on the rate of loss of sweat from the body. It is designed to measure the physiological effect of work in near limiting conditions in hot working places, and is based on the assumption that heat stress is a function of the rate of sweating.
Industry:Mining
An Indian's right to occupancy of land, and that right recognized by the United States, constitutes Indian title.
Industry:Mining
