- 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 ...
A strong surface current of short duration flowing seaward from the shore. It usually appears as a visible band of agitated water and is the return movement of water piled up on the shore by incoming waves and wind.
Industry:Mining
A strong surface current of short duration flowing seaward from the shore. It usually appears as a visible band of agitated water and is the return movement of water piled up on the shore by incoming waves and wind.
Industry:Mining
A strong timber set in a drift that may form the anchorage for the timber sets of the stope above.
Industry:Mining
A strongly banded and partly schistose rock; associated with other rocks of mylonitic habit, in which the alternating bands have been produced from ultramylonite by recrystallization and metamorphic differentiation.
Industry:Mining
A strongly dichroic variety of blue beryl obtained, as a gemstone material, from Malagasy Republic.
Industry:Mining
A strongly foliated crystalline rock, formed by dynamic metamorphism, that can be readily split into thin flakes or slabs due to the well developed parallelism of more than 50% of the minerals present, particularly those of lamellar or elongate prismatic habit, e.g., mica and hornblende. The mineral composition is not an essential factor in its definition unless specif. included in the rock name, e.g., quartz-muscovite schist. Varieties may also be based on general composition, e.g., calc-silicate schist, amphibole 2777 schist; or on texture, e.g., spotted schist. Compare: paraschist
Industry:Mining
A structural frame in which the bending moments and reactions can be determined by the laws of statics alone.
Industry:Mining
A structural frame that is stable under loads imposed upon it from any direction, but which would become unstable if one of its members were removed or one of its fixed ends became hinged.
Industry:Mining
A structural surface used as a reference in analyzing the geologic structure of an area.
Industry:Mining
A structure characterized by tiny peg-shaped cavities, some with intricate profiles, penetrating the interior of crystals; typical of melilite.
Industry:Mining
