- 行业: Mining
- Number of terms: 33118
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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 rock or mineral that is older than rocks or minerals introduced into it or formed within or adjacent to it, such as a host rock, or a large crystal with inclusions of smaller crystals of a different mineral species; a palasome. Ant: guest.
Industry:Mining
A rock or rock material, which, by virtue of its dryness, porosity, or permeability, has the ability to drink in or suck up a drilling liquid, as a sponge absorbs water.
Industry:Mining
A rock or rock material, which, by virtue of its dryness, porosity, or permeability, has the ability to drink in or suck up a drilling liquid, as a sponge absorbs water.
Industry:Mining
A rock possessing tabular structure, or which cleaves easily in the lines of lamination, and is consequently suitable for flagging and curbstones.
Industry:Mining
A rock produced by low-grade metamorphism of an argillaceous sediment without the development of cleavage.
Industry:Mining
A rock produced in place by the cementation of the fragmental products of surface weathering; e.g. a recomposed granite. The term has been applied to a rock of intermediate character straddling an unconformable surface between the breccia of the lower formation and the conglomeratic base of the upper formation.
Industry:Mining
A rock representing an early stage in the formation of adinol or spotted slate. Compare: adinole
Industry:Mining