- 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 ...
Said of a rock or soil hardened or consolidated by pressure, cementation, or heat.
Industry:Mining
Said of a rock resulting from the physiological activities of organisms, e.g., a coral reef.
Industry:Mining
Said of a rock texture produced by the intimate intergrowth of two different minerals; sometimes the term is restricted to such textures of secondary origin. One of the minerals may assume a vermicular habit. Also, said of a rock exhibiting such texture, or of the intergrowth itself; i.e., symplectite. Also spelled: symplektic; symplectitic; symplektitic. Compare: dactylitic
Industry:Mining
Said of a sediment or sedimentary rock, such as red beds or sandstone, showing variations of color in irregular spots, streaks, blotches, stripes, or reticulate patterns.
Industry:Mining
Said of a sedimentary rock composed of a significant amount of fragments coarser than sand grains; pertaining to a rudite. The term implies no special size, shape, or roundness of fragments throughout the gravel range, and is broader than pebbly, cobbly, and bouldery. Also said of the texture of such a rock.
Industry:Mining
Said of a sedimentary rock formed from mud (clay- and/or silt-size particles) or having the fine texture of impalpable powder or rock flour; pertaining to a lutite. Also said of the texture of such a rock. Compare: argillaceous; pelitic.
Industry:Mining
Said of a shot that goes into the coal beyond the point to which the coal can be broken by the blast.
Industry:Mining
