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| Aerial view of Grand Prismatic Spring |
Grand Prismatic Spring is the largest hot spring in United States and third in the world. This spring is located in the Geothermal areas of Yollowstone National Park. In Yollowstone, the Geothermal area include several geyser basins, other geothermal features such as hot springs, mud pots and fumaroles. Grand Prismatic Spring is located in the Midway Geyser Basin. The 160 feet deep Prismatic Spring is 250 by 300 feet in size approximately. The spring discharges 2100 liters of 70°C water per minute.
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| Land view of Grand Prismatic Spring |
Grand Prismatic Spring is spectacular for its striking colors. Its colors include blue, green, yellow, orange, gold, red and brown. The vivid colors in the spring are the result of pigmented bacteria in the microbial mats that grow around the edges of the mineral-rich water. The bacteria produce colors ranging from green to red. In the summer, the mats tend to be orange and red, whereas in the winter the mats are usually dark green. The deep blue color of the water in the center of the pool results from the intrinsic blue color of water and the center of the pool is sterile due to extreme heat.
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| Vivid color of Grand Prismatic Spring |
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