The Grand Prismatic Spring in Yellowstone National Park is the largest hot spring in the United States, and the third largest in the world. It is located in the Midway Geyser Basin. Grand Prismatic Spring the colors match the rainbow disperesion of white light by an optical prism: red,orange,yellow,green, and blue.
The vivid collors in the spring are the result of pigmented archea in the microbial mats that grow around the edges of the mineral rich water. The deep blue color of the water in the center of the pool results from the scattering of blue light by particles suspended in the water. The spring is approximately 370 feet (110 m) in diameter and is 121 feet (40 m) deep.
Grand Prismatic Spring
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