Sulphur Caldron
By Yellowstone
![Sulphur Caldro](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/img7866.jpg?itok=9N81oBpa)
Detailed Description
Sulphur Caldron -- an example of an acid-sulfate hydrothermal feature in Yellowstone National Park. Photo taken by Blaine McCleskey, September 2008.
Sources/Usage
Public Domain.