Fumaroles come in all shapes and sizes. This collection of small vents issues into the outflow of Porcelain Springs, which passes below the boardwalks in the Norris Geyser Basin.
The roar of steam from this unnamed fumarole speaks to the tremendous heat below the Norris Geyser Basin.
Last updated: August 21, 2017
P.O. Box 168
Yellowstone National Park, WY