Existing comment:
Grizzly Fumarole:
Changing with the Seasons:
All hydrothermal features change, but Grizzly Fumarole changes from day to day, and season to season, reflecting recent weather conditions.
Mudpot or Fumarole? A fumarole or steam vent's underground system is nearly dry. Heated deep below the surface, the water turns to steam, then rises with other gasses. Mudpots are muddy springs. Microorganisms live in mudpots and convert hydrogen sulfide gas from Yellowstone's magma chamber into sulfuric acid. This acid breaks rock and soil into mud. |