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Photographer's Note

This is a view of Grand Prismatic Spring, the third largest hot spring in the world. The red colour results from pigmented bacteria that thrive in the mineral-rich but slightly cooler water around the edges of the spring. The bacteria produce colors ranging from green to red; the amount of color in the microbial mats depends on the ratio of chlorophyll to carotenoids. In the summer, the mats tend to be orange and red, whereas in the winter the mats are usually dark green.

The weather on this particular day in Yellowstone was changeable. I waited over an hour at Grand Prismatic Spring, in the hope of getting some brighter pictures. In the end though, I was happiest with the deep reds and threatening sky of this shot.

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Additional Photos by Phillip Homer (fijiphil) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 450 W: 84 N: 233] (1355)
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