Saturday, November 15, 2014

Avoca Spring

Avoca Spring is one of the thousands of thermal pools in Yellowstone National Park. The turquoise color of the water is the intrinsic color of water which adsorbs red light wavelengths. The steam occurs as a result of the heat of the pool and the much cooler temperature of the air. Most of the thermal pools have a pungent, sulphur oder.

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