A highly productive or profitable mine; see quot. 1881.
| 单词 | θ6248 |
| 释义 | the world > the earth > minerals > mineral sources > [noun] > source rock > impregnated with ore (2) bonanza1844 A highly productive or profitable mine; see quot. 1881. impregnation1881 concrete. Geology. A mineral deposit consisting of a rock impregnated with ore, not forming a true vein. |
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