manganese nodule


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Related to manganese nodule: Foraminifera

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.
References in periodicals archive ?
This interval ended in mineralisation, in which manganese nodules have precipitated in transported sands.
They got their start back in the 1970s and 1980s, when it looked as if there were untold riches in manganese nodules scattered across the ocean floor.
The companies may also look back in history, to the ill-fated attempts to extract manganese nodules in the 1980s.
After three years of graduate studies in theoretical physics, a feasibility study to bring manganese nodules off the bottom of the ocean led her to Seattle, where she completed a master's degree in computer science.
Thousands of square miles of the sea floor, particularly in the Pacific, are covered by fields of walnut-sized manganese nodules containing considerable deposits of iron, copper, nickel and cobalt.
There are great riches in manganese nodules, cobalt, and nickel.