methane

Fig. 1. This image shows a large plume of methane-rich water, visible as a dark cloud, extending from the bottom hundreds of meters up into the water column. At the base of the thermocline (a water layer where temperature changes with depth), some of the gas bubbles are trapped forming a horizontal layer of methane-rich water in the upper water column. Image courtesy of Mandy Joye, University of Georgia.

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