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Sulphur Caldron -- an example of an acid-sulfate hydrothermal feature in Yellows

By Volcano Hazards Program
image related to volcanoes. See description
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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.