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![A covering of manganese nodules in a bathymetric low point expn6100.jpg A covering of manganese nodules in a bathymetric low point](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_expn6100.jpg?itok=ead3ZIny)
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A covering of manganese nodules in a bathymetric low point. Are they stillattached to the rock below with sediment in the intervening spaces, have theyformed in situ, have they eroded off a botryoidal manganese coated substrate? (Image credit: NOAA Office of Ocean Exploration and Research, 2015 Hohonu Moana)