| 单词 | quartz mining |
| 释义 | > as lemmasquartz mining quartz mining n. and adj. ΚΠ 1850 Zanesville (Ohio) Courier 21 Dec. 1/4 This season much attention is being paid to quartz mining. 1872 R. W. Raymond Statistics Mines & Mining 17 Some gold quartz-mining enterprises have been in operation. 1948 O. Weston Mother Lode 16 All that remains today of this once important center of quartz mining..are a few mounds of crumbling adobe. 1994 Econ. Hist. Rev. 47 301 Alluvial mining generally being less capital intensive than either hydraulic or quartz mining operations. < as lemmas |
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