Why was Yellowstone originally created?

But the ideas on which Yellowstone was founded—public access, enjoyment of nature, and conservation of wilderness—took root in the American imagination, and inspired the creation of subsequent national parks across the United States and around the world.



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Yellowstone was especially valuable as a source of obsidian, a volcanic glass used to make knives, arrowheads and other tools, and more than 50 ancient obsidian quarry sites have been documented in the park by archeologist Douglas MacDonald.

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  • Yellowstone is home to more than 500 active geysers (more than half the world's geysers). ...
  • Yellowstone Lake has 131.7 sq. ...
  • Yellowstone is home to the largest concentration of mammals in the lower 48 states (67 species). ...
  • 285 species of birds can be found in Yellowstone (150 nesting).


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We sometimes think of Yellowstone as an untouched landscape, but humans have been present in the area for over ten thousand years! The history and traditions of Indigenous people in Yellowstone are as rich as the landscape itself.

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Near the end of the 18th century, French trappers named the river Roche Jaune, which is probably a translation of the Hidatsa name Mi tsi a-da-zi (Yellow Stone River). Later, American trappers rendered the French name in English as Yellow Stone.

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Subsequent activity has been focused within the area of the National Park, and another huge eruption 631,000 years ago formed the Yellowstone caldera as we now see it. The three caldera-forming eruptions, respectively, were about 6,000, 700, and 2,500 times larger than the May 18, 1980 eruption of Mt. St.

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The Yellowstone supervolcano last erupted about 640,000 years ago. A sleeping giant is nestled in the western part of the United States. Though it stirs occasionally, it has not risen from slumber in nearly 70,000 years.

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