The horizontal course of a stratum of coal (cf. stretch, n., strike, n.1 8).
| 单词 | θ6336 |
| 释义 | the world > the earth > minerals > mineral deposits > [noun] > stratum or bed > of coal > horizontal course (2) streak1672 The horizontal course of a stratum of coal (cf. stretch, n., strike, n.1 8). stretch1799 Mining and Geology. Course or direction of a seam or a stratum with regard to the points of the compass: = streak, n.1 5, strike, n.1 8. |
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