释义 |
manganese nodule
manganese nodule n (Geological Science) geology a small irregular concretion found on deep ocean floors having high concentrations of certain metals, esp manganese manganese nodule
manganese nodule[′maŋ·gə‚nēs ′naj·ül] (geology) Small, irregular black to brown concretions consisting chiefly of manganese salts and manganese oxide minerals; formed in oceans as a result of pelagic sedimentation or precipitation. |