- 行业: 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 marine limestone composed largely of fossil crinoid remains, such as plates, disks, stems, or columns.
Industry:Mining
A marine seismic source that employs an electrical spark discharge to form the outgoing signal and produces a trace in the recorder showing the subbottom strata.
Industry:Mining
A mark made in a bit mold, bit die, or blank bit where a pip or hole is drilled to receive or to encompass a diamond.
Industry:Mining
A mark or stake placed at some distance behind the position a drill will occupy in a specific compass direction from the borehole marker for an incline hole to enable the driller to set the drill and drill the borehole in the intended direction.
Industry:Mining
A mark or stake placed at some distance behind the position a drill will occupy in a specific compass direction from the borehole marker for an incline hole to enable the driller to set the drill and drill the borehole in the intended direction.
Industry:Mining
A mark or stake placed at some distance behind the position a drill will occupy in a specific compass direction from the borehole marker for an incline hole to enable the driller to set the drill and drill the borehole in the intended direction.
Industry:Mining
A mark or stake set to indicate the position (approximate or exact) of a property corner, instrument station, or other survey point. A witness may be a rock, tree, or other object; e.g., a blazed tree on the bank of a river to indicate a corner at the intersection of some survey line with the center line of the stream, which, therefore, cannot be marked directly; a stake driven so as to stand out; and a stake marked with a station number, driven flush with or below the surface of the ground.
Industry:Mining
A marker set on a property line leading to a corner; used where it would be impracticable to maintain a monument at the corner itself.
Industry:Mining
A marking, commonly in the form of minute pits, produced by a solvent on a crystal surface; the form varies with the mineral species and the solvent, but reflects the symmetry of the structure; also called etching figure.
Industry:Mining
