Global Volcanism Program | Image GVP-00780
The yellow stripes in the foreground are strandlines of elemental sulfur particles that have been washed up on the shoreline of Kawah Ijen lake by wave action. The crater walls of Kawah Ijen have been the site of a long-term sulfur-mining operation.
Photo by Tom Casadevall, 1987 (U.S. Geological Survey).
This image is made available as a Public Domain Work, but proper attribution is appreciated.