- 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 ...
The unit of exposure dose of X-ray or gamma-ray radiation. One roentgen is an exposure dose of X-ray or gamma-ray radiation such that the associated corpuscular emission per 2694 0.001293 g of air produces, in air, ions carrying 1 electrostatic unit of quantity of electricity of either sign. Designated by the symbol R. Also spelled roentgen.
Industry:Mining
The unit of magnetomotive force in the electromagnetic system, equal to the magnetomotive force of a closed loop of one turn in which there is a current of 1/(4pi ) abamp.
Industry:Mining
The unit of survey of the U.S. Public Land Survey system, representing a piece of land that is bounded on the east and west by meridians approx. 6 miles (9.6 km) apart (exactly 6 miles at its south border) and on the north and south by parallels 6 miles apart, and that is normally subdivided into 36 sections. Townships are located with reference to the initial point of a principal meridian and base line, and are normally numbered consecutively north and south from a base line (e.g., township 14 north indicates a township in the 14th tier north of a base line). The term township is used in conjunction with the appropriate range to indicate the coordinates of a particular township in reference to the initial point (e.g., township 3 south, range 4 west indicates the particular township that is the 3rd township south of the base line and the 4th township west of the principal meridian controlling the surveys in that area). Abbrev. (when citing specific location): T.
Industry:Mining
The unit weight of a soil that, when multiplied by the height of the overlying column of soil, yields the effective pressure due to the weight of the overburden.
Industry:Mining
The unobstructed distance that the wind can travel to any point when raising waves.
Industry:Mining
The upper confining bed of an aquifer whose head is above the upper surface of the zone of saturation; i.e., above the water table. Little used.
Industry:Mining
The upper or bearing part of a bridge pier; usually made of concrete or hard stone; designed to distribute concentrated loads evenly over the area of the pier.
Industry:Mining
