- Industry: 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 ...
Dense, laminated, brownish-red algal coal found in Irkutsk, Russia. It consists of an accumulation of spheroidal algal colonies of different sizes, among which are 629 disseminated great numbers of desmid algae, belonging to the living genus, Closterium.
Industry:Mining
Dense-media system used to float coal away from shale, the latter falling to the bottom of a wedge-shaped pool of separating fluid and being withdrawn by a rising belt.
Industry:Mining
Deposit found in deep water far from shore and may be predominantly either organic or inorganic in origin. Such deposits are light colored, reddish or brown, fine grained, and generally contain some skeletal remains of plankton organisms. Those that contain less than about 30% of organic remains are called red clay; those that contain more than about 30% of organic remains are known as oozes.
Industry:Mining
Deposit from the acid waters of a mine or partial neutralization. Ferrous anhydride and other impurities including fine clay carried down with it.
Industry:Mining
Deposition, around a clastic mineral grain, of material of the same composition as that grain and in optical and crystallographic continuity with it, often resulting in crystal faces characteristic of the original mineral; e.g., the addition of a quartz overgrowth around a silica grain in sandstone.
Industry:Mining
Deposits and coal seams having a dip of from 40 degrees to 60 degrees .
Industry:Mining
Deposits consisting dominantly of minerals crystallized out of sea water, such as manganese nodules.
Industry:Mining
Deposits of coal, phosphate, oil, oil shale, gas, sodium, potassium and sulfur that can be leased from the U.S. Government under the Mineral Leasing Act for acquired lands.
Industry:Mining
Deposits of siliceous ooze made up largely of radiolarian skeletons and are formed at depths between 13,000 ft and 25,000 ft (4.0 km and 7.6 km).
Industry:Mining
