- 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 general term for a roadway, heading, or tunnel in course of construction. It may be horizontal or inclined but not vertical.
Industry:Mining
A general term for a series of rock strata having the same dip, e.g., one limb of a fold, a tilted fault block, or an isocline. Compare: monocline Adj: homoclinal.
Industry:Mining
A general term for a topographic feature of any size that rises above the adjacent land or the surrounding ocean bottom; a place or station that is elevated. The vertical distance from a datum (usually mean sea level) to a point or object on the Earth's surface; esp. the height of a ground point above the level of the sea. The term is used synonymously with altitude in referring to distance above sea level, but in modern surveying practice the term elevation is preferred to indicate heights on the Earth's surface, whereas altitude is used to indicate the heights of points in space above the Earth's surface.
Industry:Mining
A general term for all consolidated pyroclastic rocks. Not to be confused with tufa. Adj: tuffaceous. Compare: crystal tuff.
Industry:Mining
A general term for any cave deposit of calcite or other mineral formed by dripping water, including stalactites and stalagmites.
Industry:Mining
A general term for any light-colored, fine-grained or aphanitic extrusive or hypabyssal rock, with or without phenocrysts, and composed chiefly of quartz and feldspar; a rock characterized by felsitic texture.
Industry:Mining
A general term for any light-colored, fine-grained or aphanitic extrusive or hypabyssal rock, with or without phenocrysts, and composed chiefly of quartz and feldspar; a rock characterized by felsitic texture.
Industry:Mining
A general term for any light-colored, fine-grained or aphanitic extrusive or hypabyssal rock, with or without phenocrysts, and composed chiefly of quartz and feldspar; a rock characterized by felsitic texture.
Industry:Mining
