: a submarine mountain rising above the deep-sea floor
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The conundrum began in the summer of 2023, when NOAA personnel aboard the Okeanos Explorer sent a robot about two miles down to explore a small seamount and found the golden orb, which was about four inches in diameter, connected to a rock.—Sam Gillette, PEOPLE, 24 Apr. 2026 Over millions of years, metals in the surrounding seawater form coatings of iron and manganese oxides, with thicknesses ranging from a few millimeters to a few decimeters, depending on the age of the seamounts.—Leonardo MacElloni, The Conversation, 10 Mar. 2026 These cobalt crusts are found on seamount slopes, which contain vital metals such as cobalt, nickel, and platinum.—Mrigakshi Dixit, Interesting Engineering, 7 Nov. 2025 The seamount is 250 miles north of Palau — an island country east of the Philippines — and multibeam sonar revealed its peak is hidden about 800 feet below the surface.—Mark Price, Sacbee.com, 11 Sep. 2025 See All Example Sentences for seamount