Explore Lower Geyser Basin, Yellowstone National Park, Wyoming

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Lower Geyser Basin has a much less concentrated set of geothermal features then other areas in the park. The main feature is the Fountain Paint Pots, which are a hot spring that contains boiling mud instead of water. The mud is produced by a higher acidity in the water which enables the spring to dissolve surrounding minerals to create an opaque, usually grey, mud. Also found in this basin is Great Fountain Geyser, whose eruptions reach 100 to 200 feet (30–61 m) in the air, while waves of water cascade down its sinter terraces.

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