Colours of the Grand Prismatic Spring
by Ioannis Daglis, National and Kapodistrian University of Athens, Athens, Greece
Colours of the Grand Prismatic Spring, Yellowstone National Park, Wyoming, USA. The colours are due to microorganisms - mostly extreme thermophilic bacteria and archaea - that survive in the scalding water of the hot spring.
Ioannis Daglis (distributed via imaggeo.egu.eu)