- 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 ...
Specimens of a mineral species with distinctive physical properties due to: (1) specific history; e.g., Iceland spar, a coarsely crystalline variety of calcite of optical grade, or (2) small chemical variation; e.g., amalgam, a mercurian variety of native silver.
Industry:Mining
Sphalerite in small crystals or pebblelike grains not attached to rock, but found in clay in wall rock cavities.
Industry:Mining
Spherical surface that a given portion of a seismic impulse (in an isotropic medium) occupies at any particular time.
Industry:Mining
Spiral ribbon of steel enclosed between two steel disks, mounted on a horizontal hollow shaft into which pulp picked up peripherally is discharged during slow rotation.
Industry:Mining
Splice made by holding the bared wires side by side. Half of their length is bent back to form a loop at the end. The loop is then twisted around the main shank of wire.
Industry:Mining
Spoil in excess of that necessary to backfill and grade affected areas to the approximate original contour. The term may include box-cut spoil where it has been demonstrated for the duration of the mining operation, that the box-cut spoil is not needed to restore the approximate original contour.
Industry:Mining
