Geology. With out: the narrowing of a stratum or the like to the point of extinction. Cf. wedge, v.1 6.
| 单词 | θ4745 |
| 释义 | the world > the earth > structure of the earth > structural features > sedimentary formation > [noun] > stratum > position or direction of strata > narrowing (4) wedging1819 Geology. With out: the narrowing of a stratum or the like to the point of extinction. Cf. wedge, v.1 6. 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… lensing1923 Geology. The fact or manner of lensing out (lens, v.). pinch-out1928 A gradual thinning of a stratum, vein, etc., to the point of extinction. Cf. pinching, n. compounds. |
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