Black Pool. This hot spring is located in the West Thumb Geyser Basin. Until 1991 this pool was cool enough to support a large population of cyanobacteria that made the water appear black. A shift of thermal energy in 1991 caused Black Pool to heat considerably,killing off all the cyanobacteria and leaving the water a very clear blue. Photographed in Yellowstone National Park,Wyoming,USA | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / AURÉLIEN CELETTE, MONA LISA PRODUCTION |
Bildgröße: | 5616 px × 3744 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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