The Saildrone Surveyor mission discovered the unnamed, 3,200-foot-tall formation in February while mapping the seafloor off the coast of California.
A strange underwater mountain towering above the seafloor"like a Bundt cake" has been discovered off the coast of California by an uncrewed sailing ship mapping the North Pacific, according to the mission team.
Underwater mountains formed by volcanic activity sometimes poke through the ocean surface and give rise to islands, such as Hawaii. But this one is entirely submerged, with a crowning crater still visible 1,200 feet below sea level. The tall doughnut shape may be the result of intense and rapid volcanic activity or a pileup of marine detritus —"millennia of fish poop" — that sharpened the slopes, Elmore said. While this type of formation exists elsewhere on the ocean floor, it is rare to find one big enough to qualify as a seamount.
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