Sapphire Pool Yellowstone National Park
by NPS Photo JP Clum
Title
Sapphire Pool Yellowstone National Park
Artist
NPS Photo JP Clum
Medium
Photograph - Photograph
Description
Sapphire Pool, Biscuit Basin photographed by JP Clum Lantern, 1910. Sapphire Pool, named for its blue, crystal-clear water and for its resemblance to an Oriental sapphire, was once a placid hot pool. It was not until after the 1959 earthquake that major eruptions occurred. For several years following the earthquake powerful eruptions at two hour intervals reached 150 feet. The force of the eruptions caused the crater to double in size, destroying the biscuit-like formations around its edge, and the crystal-clear water became murky. By 1968 Sapphire ceased to function as a true geyser. Today Sapphire still retains its crystal-clear, blue water, and still violently boils and surges occasionally. Biscuit Basin contains a small collection of thermal features. Many, however, are small, gem-like encrusted pools and geysers, including Silver Globe Spring, Sapphire, and Black Opal pools, Jewel, Cauliflower, and Black Pearl geysers. Yellowstone National Park is a national park located primarily in the state of Wyoming, although it also extends into Montana and Idaho. It was established by the U.S. Congress and signed into law by President Ulysses S. Grant on March 1, 1872. Yellowstone, widely held to be the first national park in the world, is known for its wildlife and its many geothermal features. The park spans an area of 3,468.4 square miles. The Yellowstone Caldera is the largest supervolcano on the continent. Half of the world's geothermal features are in Yellowstone, fueled by this ongoing volcanism. Lava flows and rocks from volcanic eruptions cover most of the land area of Yellowstone. The park is the centerpiece of the Greater Yellowstone Ecosystem, the largest remaining nearly-intact ecosystem in the Earth's northern temperate zone. Hundreds of species of mammals, birds, fish and reptiles have been documented, including several that are either endangered or threatened. The vast forests and grasslands also include unique species of plants. Yellowstone Park is the l
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July 29th, 2014
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