Yellowstone Dutton Ranch Logo Hat - Authentic Brown Washed Design with Embroidered Logo - As Seen on Yellowstone - Adjustable Hook Closure - Officially Licensed, Brown, One size

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Annual Park Ranking Report for Recreation Visits in: 2022". National Park Service . Retrieved July 23, 2023.

Hayden and his 1871 party recognized Yellowstone as a unique place that should be available for further research. He also was encouraged to preserve it for others to see and experience it as well. In 1873, Congress authorized and funded a survey to find a wagon route to the park from the south which was completed by the Jones Expedition of 1873. [38] Eventually the railroads and, sometime after that, the automobile would make that possible. The park was not set aside strictly for ecological purposes; however, the designation "pleasure ground" was not an invitation to create an amusement park. Hayden imagined something akin to the scenic resorts and baths in England, Germany, and Switzerland. [35] Information Every Visitor Needs to Know". National Park Service. March 6, 2007. Archived from the original on September 23, 2013 . Retrieved March 21, 2007. Left: Thomas Moran painted Tower Creek while on the Hayden Geological Survey of 1871. Right: Travertine Terrace, Mammoth Hot Springs

A second significant, though smaller, volcanic eruption occurred within the western edge of the first caldera approximately 1.3 million years ago. The third and most recent massive volcanic eruption 631,000 years ago created the present 30- by 45-mile-wide Yellowstone Caldera. Since then, 80 smaller eruptions have occurred. Approximately 174,000 years ago, one of these created what is now the West Thumb of Yellowstone Lake. During and after these explosive eruptions huge lava flows of viscous rhyolitic lava and less voluminous basalt lava flows partially filled the caldera floor and surrounding terrain. The youngest of these lava flows is the 70,000 year old Pitchstone rhyolite flow in the southwest corner of Yellowstone National Park. Report of the Superintendent of the Yellowstone National Park to the Secretary of the Interior for the year 1872". Archived from the original on January 15, 2017.

assess the long-term potential hazards of volcanism, seismicity, and explosive hydrothermal activity in the region;Hundreds of species of mammals, birds, fish, reptiles, and amphibians have been documented, including several that are either endangered or threatened. [11] The vast forests and grasslands also include unique species of plants. Yellowstone Park is the largest and most famous megafauna location in the contiguous United States. Grizzly bears, cougars, wolves, and free-ranging herds of bison and elk live in this park. The Yellowstone Park bison herd is the oldest and largest public bison herd in the United States. Forest fires occur in the park each year; in the large forest fires of 1988, nearly one-third of the park was burnt. Yellowstone has numerous recreational opportunities, including hiking, camping, boating, fishing, and sightseeing. Paved roads provide close access to the major geothermal areas as well as some of the lakes and waterfalls. During the winter, visitors often access the park by way of guided tours that use either snow coaches or snowmobiles. [19] History [ edit ] In 1963, after several years of public controversy regarding the forced reduction of the elk population in Yellowstone, the United States Secretary of the Interior Stewart Udall appointed an advisory board to collect scientific data to inform future wildlife management of the national parks. In a paper known as the Leopold Report, the committee observed that culling programs at other national parks had been ineffective, and recommended the management of Yellowstone's elk population. [68] Archive of Stories About the Yellowstone Volcanic System". Yellowstone Volcano Observatory. U.S. Geological Survey. February 2, 2007. Archived from the original on February 10, 2007 . Retrieved March 12, 2007. Earthquakes [ edit ] Infrastructure damage at Hebgen Lake due to the 7.2 magnitude earthquake of 1959 Presence Of Wolves Allows Aspen Recovery in Yellowstone". Archived from the original on October 1, 2007 . Retrieved August 1, 2007.