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Temperature determines which thermophilic bacteria live here.
The water initially appeared black; hence its name.
A black and white image highlights the texture of the sinter deposits.
Recently, the water was a brilliant turquoise
and the shore on the left was a a flaming orange.
West Thumb Geyser Basin, Yellowstone National Park
Carol E Sandgren | 18-Dec-2010 05:12 | |