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单词 manganese nodule
释义

manganese nodule

noun
A small concretion consisting of manganese and iron oxides, occurring in large numbers in ocean-floor sediment.Crusts of iron-manganese oxides and manganese nodules occur, particularly in red clays....
  • A co-occurrence of these two species is known from only one locality, where they were collected from manganese nodules immediately above the Grimmeri Bed.
  • But as Challenger approached the West Indies the crew encountered a phenomenon that dwarfed in importance even the discovery of manganese nodules.
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更新时间:2026/6/11 11:57:14