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(geology) a concretion of oxides of manganese and iron found on the floor of many oceans

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manganese nodule

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manganese nodule

noun

(geology) a concretion of oxides of manganese and iron found on the floor of many oceans

Scientists have discovered a large manganese nodule on the ocean floor.

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(geology) a concretion of oxides of manganese and iron found on the floor of many oceans

1977 The most likely locations for early commercial mining of these seabed resources will be the Pacific Basin where there is a heavy concentration of manganese nodule sites at depths of between 12,500 feet and 17,500 feet. The Times - May 26, 1977 pg 27 col D

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manganese nodule

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