Originally and chiefly Australian and New Zealand. Rock which does not contain gold. Also: the refuse from which gold, etc., has been extracted.
| 单词 | θ6249 |
| 释义 | the world > the earth > minerals > mineral sources > [noun] > source rock > non-source (2) mullock1855 Originally and chiefly Australian and New Zealand. Rock which does not contain gold. Also: the refuse from which gold, etc., has been extracted. reef1869 Mining (originally Australian). In later use chiefly South African. Unproductive bedrock surrounding gold- or diamond-bearing materials; gangue… |
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