Global Volcanism Program | Image GVP-02240
Intense fumarolic activity occurs on the margins of Atosanupuri lava dome and along fissures along the dome. Constant high-temperature emisson of steam and gas has extensively altered the rocks on the dome. Areas of sulfur deposition such as this are common and have been mined since 1887.
Photo by Lee Siebert, 1977 (Smithsonian Institution).
This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.