Methane gas hydrate forming below a rock overhang at the sea floor on the Blake Ridge diapir. This image, taken from the DSV Alvin during the NOAA-sponsored Deep East cruise in 2001, marked the first discovery of gas hydrate at the sea floor on the Blake Ridge. Methane bubbling out of the sea floor below this overhang quickly “freezes,” forming this downward hanging hydrate deposit, dubbed the "inverted snowcone."
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