Mining. A section in which a vein of ore or coal is greatly narrowed or interrupted by the convergence of the enclosing beds of stone. Cf. twitch, v.1…
| 单词 | θ6282 |
| 释义 | the world > the earth > minerals > mineral deposits > features of stratum or vein > [noun] > pinching > pinched place (3) twitch1630 Mining. A section in which a vein of ore or coal is greatly narrowed or interrupted by the convergence of the enclosing beds of stone. Cf. twitch, v.1… pinch1873 Mining and Geology. A point at which a mineral vein is narrowed or compressed by the walls of rock; a similar narrowing of a stratum. Frequently in… pinch and swell1916 Mining and Geology. A point at which a mineral vein is narrowed or compressed by the walls of rock; a similar narrowing of a stratum. Frequently in… |
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