During several dives on the
Okeanos Explorer Gulf of Mexico 2017 expedition, we found low relief, sediment-covered mounds that may contain a core of gas hydrate mixed with sediment and carbonate rock. The mounds probably form as the underlying gas supply builds up a hydrate deposit beneath and on the seafloor. This mound found during Dive 17 has exposed hydrate just below the peak and a bubble stream visible in the center of the photo.
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