An alluvial deposit; alluvium; esp. an alluvial deposit bearing metals or minerals. Frequently in plural.
| 单词 | θ6252 |
| 释义 | the world > the earth > minerals > mineral sources > [noun] > auriferous gravel (7) alluvial1818 An alluvial deposit; alluvium; esp. an alluvial deposit bearing metals or minerals. Frequently in plural. placer1829 A deposit of sand, gravel, or earth, esp. in the bed of a stream, containing particles of gold or other valuable minerals; a place where this… gravel1849 Geology and Mining. A stratum of this material, esp. one that contains gold. pay gravel: see pay, n. compounds 3. washing-stuff1853 a miners' name for auriferous earth. pay gravel1857 gravel containing enough gold to yield a profit. wash-gravel1860 = wash-dirt, n. wash-dirt1862 Auriferous soil or gravel to be submitted to washing. |
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