- 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 ...
A term applied in Minnesota to rusty-colored outcropping rocks, such as gabbros and quartzites, that resemble brown sugar. Etymol: Spanish, brown sugar.
Industry:Mining
A term applied in the early 19th century as a syn. of Floetz. It was later applied to the extensive series of stratified rocks separating the older Primary and the younger Tertiary rocks, and ranging from the Silurian to the Cretaceous; still later, it was restricted to the whole of the Mesozoic Era. The term was abandoned in the late 19th century in favor of Mesozoic.
Industry:Mining
A term applied in the grading of quartz crystals to fairly large needlelike inclusions or imperfections that appear to be hard.
Industry:Mining
A term applied in the Western United States to diggings for gold or other precious minerals located on a bar or in the shallows of a stream, and worked when the water is low.
Industry:Mining
A term applied loosely to any disturbed bedding; specif. deformed bedding produced by subaqueous slumping or lateral movement of newly deposited sediment.
Industry:Mining
A term applied loosely to any fine-textured, fairly plastic clay that acquires a natural vitreous skin in burning and that is used in the manufacture of terra cotta. It is characterized by low shrinkage, freedom from warping, strong bonding, and absence of soluble salts.
Industry:Mining
A term applied to a borehole that has been started and the hole has reached bedrock and/or the standpipe has been set.
Industry:Mining
A term applied to a chain bracket to be inserted between adjacent shaker conveyor troughs to permit suspension of the trough line from the roof.
Industry:Mining
A term applied to a rock texture produced by a symplectic intergrowth, in which one mineral is penetrated by fingerlike projections from another mineral; also, said of a rock exhibiting such texture.
Industry:Mining
A term applied to a single stick of timber, called a post, stull, or prop. Post and prop are applied to vertical timbers, and stull is applied to inclined timbers, or those placed horizontally.
Industry:Mining
