- 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 ...
Of or pertaining to hot water, to the action of hot water, or to the products of this action, such as a mineral deposit precipitated from a hot aqueous solution, with or without demonstrable association with igneous processes; also, said of the solution itself. Hydrothermal is generally used for any hot water but has been restricted by some to water of magmatic origin.
Industry:Mining
Of or pertaining to intrusion--both the processes and the rock so formed. n. An intrusive rock. Compare: extrusive
Industry:Mining
Of or pertaining to sedimentation partly in lake water and partly in streams, or to deposits laid down under alternating or overlapping lacustrine and fluviatile conditions.
Industry:Mining
Of or relating to Abraham G. Werner (1749-1817), German mineralogist and geologist, who classified minerals according to their external characteristics, advocated the theory of neptunism, and postulated a worldwide age sequence of rocks based on their lithology. Also, said of one who is a great, but dogmatic, teacher of geology. n. An adherent of wernerian beliefs; a neptunist.
Industry:Mining
Of rocks, bedding in layers less than 1 cm thick; formation with thin layers that vary in grain or composition.
Industry:Mining
Of the same chemical composition but of different crystalline form. Compare: allomeric
Industry:Mining
Of, or pertaining to, smoothly rounded masses resembling breasts or portions of spheres; descriptive of the shape of some mineral aggregates, such as malachite or limonite; similar to but a larger size than botryoidal.
Industry:Mining
