Sulfur flow over acid-sulfate ground
![This is a photo of sulfur flow over acid-sulfate ground.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/Sulfur%20flow%20over%20acid-sulfate%20ground.jpg?itok=snmmxRib)
Detailed Description
Sulfur flow over acid-sulfate ground at Brimstone Basin, Yellowstone National Park. The flows formed when native sulfur deposits were ignited during a forest fire.
Sources/Usage
Public Domain.