Global Volcanism Program | Image GVP-08263
The Aguas Termales geothermal field on the lower southern flank of Rincón de la Vieja volcano contains mud pools like this one. Several geothermal areas occur along a NW trend at the base of the volcano. Soil mercury studies delineate a fault parallel to the volcanic front that connects the geothermal sites.
Photo by Lee Siebert, 1998 (Smithsonian Institution).
This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.
Galleries: Geothermal Features