6 In some areas, alluvial gold was worked by shafts sunk into river banks and reef mining may have developed from this technique see, for example, The Rhodesian Mining Review, 19 02 1913, 185. For further details of alluvial mining methods, see I. R. Phimister, Placer mining in South Central Africa, unpub. research paper.Free consultation 40 years of industry experience providing one-stop solution
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