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- Rocklike deposits found on the sea bottomDeep-sea mineral nodules, also known as polymetallic nodules or manganese nodules, are rocklike deposits found on the sea bottom1234. They contain minerals such as magnesium, nickel, copper, zinc, and cobalt2. These nodules grow very slowly, at an average rate of just 10 to 20 millimeters every million years1.Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.The growth of these deep-sea nodules —metallic lumps of manganese, iron, and other metals found in all the major ocean basins—is one of the slowest known geological processes. These ringed concretions, which are potential sources of rare-earth and other critical elements, grow on average just 10 to 20 millimeters every million years.phys.org/news/2020-01-nodules-bottom-sea.htmlScattered across the abyssal plain are trillions of polymetallic nodules, potato-sized rocklike deposits containing minerals such as magnesium, nickel, copper, zinc, and cobalt.en.wikipedia.org/wiki/Deep_sea_miningPolymetallic nodules, also called manganese nodules, are mineral concretions on the sea bottom formed of concentric layers of iron and manganese hydroxides around a core. As nodules can be found in vast quantities, and contain valuable metals, deposits have been identified as a potential economic interest.en.wikipedia.org/wiki/Manganese_noduleIn marine geology, more specifically, the term usually refers to manganese nodules, a mineral type that forms by accreting in concentric layers around a fragment of some other rock or biological material, called a nucleus. When a manganese nodule is cut in half, the circular layers around the nucleus are reminiscent of tree rings.oceanexplorer.noaa.gov/okeanos/explorations/ex2…
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WEBThe nodules occur over extensive areas of the vast, sediment-covered, abyssal plains of the global ocean in water depths of 4 000 to 6 500 metres, where temperatures are just above freezing, pressures are high, and no …
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