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Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA | Yellowstone National Park - Wyoming, USA (IMG_5564.jpg)

Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA

The Hayden Expedition in 1871 named this spring because of its beautiful coloration. The colors begin with a deep blue center followed by pale blue. Green algae forms beyond the shallow edge. Outside the scalloped rim a band of yellow fades into orange. Red then marks the outer border. Steam often shrouds the spring which reflects the brilliant colors. Grand Prismatic discharges an estimated 2,100 L (560 gallons) per minute.
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