There, snow and rain slowly percolate through layers of permeable rock riddled with cracks. They also depend on sources of water, such as from the mountains surrounding the Yellowstone Plateau. Yellowstone's hydrothermal features would not exist without the underlying magma body that releases tremendous heat. Combine this with more than 10,000 thermal features comprised of brilliantly colored hot springs, bubbling mudpots, and steaming fumaroles, and you have a place like no other. Its more than 300 geysers make up two thirds of all those found on earth. With half of the earth's geothermal features, Yellowstone holds the planet's most diverse and intact collection of geysers, hot springs, mudpots, and fumaroles. In 1978 it was designated a World Heritage Site by UNESCO. On March 1,1872, Yellowstone became the first National Park reserve declared anywhere in the world, by President Ulysses S. Although it is commonly assumed that the park was named for the yellow rocks seen in the Grand Canyon of the Yellowstone, the park's name comes from the Yellowstone River that flows through it, which is in turn named after sandstone bluffs found farther down its course in eastern Montana. Its eruptions are among the largest known to have ever occurred on Earth, producing drastic climate change in the aftermath. The Yellowstone super volcano is believed to erupt every 600,000 to 900,000 years with the last event occurring 640,000 years ago. Helens, and it left a caldera approximately 34 by 45 miles (55 by 72 km). The eruption may have been as much as one thousand times more powerful than the 1980 eruption of Mt. ![]() Long before any recorded human history in Yellowstone, a massive volcanic eruption spewed an immense volume of ash that covered all of the western U.S., much of the Midwest, northern Mexico and some areas of the eastern Pacific Coast. Solar Glory in Yellowstone National Park History
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