Rainbow Pool, a broad (50 foot diam) heated pool in Black Sand Basin, will rarely erupt. Usually it is calm and mildly overflowing, allowing colorful thermophilic cyanobacteria and algae to grow around its edges. Yellowstone National Park, Wyoming, USA
Location:
Black Sand Basin,
Yellowstone National Park,
WyomingImage ID:
07303Format: Digital 3:2
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