The yellow, orange, and brown colors are caused by heat loving microorganisms. These microbes contain colorful pigments that allow them to make energy from sunlight and thrive in hot springs.
The intense blue color is because sunlight is scattered by fine particles suspended in the water.
Magma from an active volcano heats water that rises to the surface through fissures in the rocks. The water is constantly 160F causing the spring to steam.
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