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单词 mullock reef
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mullock reef
mullock reef n. Australian and New Zealand (now historical) an area of rock with a high proportion of mullock but yielding some gold or minerals.
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1865 Reps. Mining Surveyors & Registrars (Victoria) June 37 A good mullock reef, 4 to 5 feet thick. Good prospects can be washed from this reef.
1875 App. Jrnls. House of Representatives N.Z. (5th Sess. 5th Parl.) II. H.–3. 29 The reefs of the Carrick Range..are peculiar clayey ferruginous ‘mullock reefs’ or rather ‘quartz-mullock reefs’.
1965 G. J. Williams Econ. Geol. N.Z. iii. 20/2 Mullock reef, a number of leaders traversing the mullock; collectively these may be worth working.
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