- 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 ...
Pertaining to or containing asphalt; e.g., asphaltic limestone or asphaltic sandstone impregnated with asphalt, or asphaltic sand representing a natural mixture of asphalt with varying proportions of loose sand grains.
Industry:Mining
Pertaining to or designating that part of the electromagnetic spectrum ranging in wavelength from 0.7 mu m to about 1 mm. Compare: visible light
Industry:Mining
Pertaining to physical processes within the Earth as they affect the features of the crust.
Industry:Mining
Pertaining to porphyritic rocks in which the phenocrysts are arranged in lines or streaks.
Industry:Mining
Pertaining to rocks or strata that are normally below those of later formations of the same subdivision of rocks. The adj. is applied to the name of a chronostratigraphic unit (system, series, stage) to indicate position in the geologic column and corresponds to early as applied to the name of the equivalent geologic-time unit; e.g., rocks of the Lower Jurassic System were formed during the Early Jurassic Period. The initial letter of the term is capitalized to indicate a formal subdivision (e.g., Lower Devonian) and is lowercased to indicate an informal subdivision (e.g., lower Miocene). The informal term may be used where there is no formal subdivision of a system or of a series. Compare: upper; middle.
Industry:Mining
Pertaining to sedimentary rocks, signifying that they were formed by deposition from above, as of suspended material.
Industry:Mining
Pertaining to swamps or marshes, and to organic, clay, or other material deposited in a swamp environment. Compare: palustrine
Industry:Mining
Pertaining to the composition, sequence, and correlation of stratified rocks.
Industry:Mining
