Mesmerizing mud pot bubbles

Like a big pot of boiling mush or porridge, one could watch this hypnotic bubbling for some time. The different mud colors come from oxidation states of the iron in the mud. The heat in the caldera forces pressurized water up through the ground, and also gasses causing the bubbling action. In the early summer, the mud is watery from the high-water table due to rain and snow melt. By the end of summer, the mud is much thicker as the water table drops.
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