On March 1, 1872, President Ulysses S.Grant had approved the establishment of Yellowstone National Park “as a public park or pleasuring-ground for the benefit and enjoyment of the people.”
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But Roosevelt did not create Yellowstone. More than 30 years before his visit, President Ulysses S. Grant signed the Yellowstone National Park Protection Act, establishing the first national park in the world.
Roosevelt went on to strengthen the protections of public lands, campaigning on conservation for the Vice Presidency in 1900 and later as President, establishing the National Parks system that currently protects not just Yellowstone, but 85 million total acres of American lands.
The Roosevelt Arch, built in the park's Army era, is said to have been the idea of Hiram M.Chittenden of the U.S. Army Corps of Engineers. He felt that the approach to the park was barren and lacked suitable grandeur.
Chester A.Arthur was the first President to visit Yellowstone (seated, center) in August 1883. Late in his visit, several newspapers published a “Startling Report” of a plot to kidnap the president and his entourage and hold them for ransom as reported by the Hailey, Idaho Wood River Times on August 24, 1883.
Grant designated Yellowstone as the first national park in the United States and the world. Today, the park is home to the world's largest collection of geysers, including the iconic Old Faithful.
That state with the most national parks is California, with nine of the nation's 61 national parks within its borders. The total acreage of these nine national parks in California is more than 6.3 million acres.
Instead, the name was attributed as early as 1805 to Native Americans who were referring to yellow sandstones along the banks of the Yellowstone River in eastern Montana, several hundred miles downstream and northeast of the Park.
As pressure is released, gases dissolved in the magma come out of solution, turning the magma into a boiling froth. The total energy released would be equivalent to an 875,000 megaton explosion. The shockwave would kill 90,000 people. Most of the lava would fall back into the crater.