Figure F3. A. Temperature profiles from conductivity/temperature/depth recorder over southern Hydrate Ridge. The stability boundaries for (A) pure methane hydrate and (B) a mixture of 97.5% methane and 2.5% hydrogen sulfide are shown as are the water depths of Leg 204 sites. B. Echo sounder records (12 kHz) from the region of Hydrate Ridge showing bubbles in the water column.
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