Global Volcanism Program | Image GVP-03326
Gas escaping from a mudpot at Yellowstone creates an ephemeral spherical bubble. Mudpots form in hydrothermal systems where the gas phase dominates the thermal system in areas of intense, clay-rich hydrothermal alteration.
Copyrighted photo by Katia and Maurice Krafft, 1984.
Copyrighted image used with permission. All Rights Reserved. Contact photographer for any usage requests.