Global Volcanism Program | Image GVP-06268
Mud extruding from a small vent in a geothermal area of the Rotorua caldera resembles a lava flow with the flow ridges perpendicular to the direction of movement. Desiccation cracks cut the surface of the older surrounding mud.
Photo by Tom Simkin, 1986 (Smithsonian Institution).
This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.
Galleries: Geothermal Features