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Grand Prismatic Spring - Colorful Close Up | [ Sizes: Orig | Large | Med | Small | Thumb ] | |||
Grand Prismatic Spring - Yellowstone The orange color is caused by cyanobacteria – aquatic photosynthesizing bacteria on the cooler edges of the spring Comments |
Image ID: 520207 Hits: 423 ![]() Image Type(s): Informational, Scenery |