- 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 ...
Sedimentary strata composed largely of sandstone, siltstone, and shale, with locally thin units of conglomerate, limestone, or marl, that are predominantly red in color due to the presence of ferric oxide (hematite) usually coating individual grains; e.g. the Permian and Triassic sedimentary rocks of western United States, and the Old Red Sandstone facies of the European Devonian.
Industry:Mining
Sediments derived from the destruction of preexisting rocks on the Earth's surface, as distinguished, e.g., from sediments of organic or volcanic origin.
Industry:Mining
Segregation of particular lands from the operation of specified public land laws, making those laws inapplicable to those lands. Lands may be withdrawn from all or any part of the public land laws, including the mineral location and mineral leasing laws.
Industry:Mining
Seismic calculations are usually reduced to a convenient reference surface or plane. These calculations simulate a condition where the charge is shot on the reference surface and the energy is also recorded on this same reference surface. At this reference surface, the time-depth charts have their origin.
Industry:Mining
Seismograph developed by Frank Rieber for the application of reflection methods to areas of complex geology and steeply dipping beds. The ordinary oscillograph traces are replaced by sound tracks of variable transparency on a moving picture film. The analyzer adds up impulses which are in phase while the random effects tend to cancel one another.
Industry:Mining
Self-acting inclined track used to lower filled coal tubs and raise empty ones.
Industry:Mining
