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103-401: Youth Conservation Corps members work in public lands restoring, rehabilitating, and repairing the natural, cultural, and historical resources protected as federally preserved places. Some examples of work completed each season by Youth Conservation Corps are: Participants are paid the established federal minimum wage. Participants in states with a minimum wage higher than the federal are paid at

206-503: A Chicago, Burlington & Quincy connection opened via Cody and in 1908 a Union Pacific Railroad connection to West Yellowstone, followed by a 1927 Milwaukee Road connection to Gallatin Gateway near Bozeman , also motorcoaching visitors via West Yellowstone. Rail visitation fell off considerably by World War II and ceased regular service in favor of the automobile around the 1960s, though special excursions occasionally continued into

309-469: A New Deal relief agency for young men, played a major role between 1933 and 1942 in developing Yellowstone facilities. CCC projects included reforestation, campground development of many of the park's trails and campgrounds, trail construction, fire hazard reduction, and fire-fighting work. The CCC built the majority of the early visitor centers, campgrounds, and the current system of park roads. During World War II, tourist travel fell sharply, staffing

412-410: A 5 km (3.1 mi) diameter crater at Mary Bay on the edge of Yellowstone Lake (located in the center of the caldera). Currently, volcanic activity is exhibited via numerous geothermal vents scattered throughout the region, including the famous Old Faithful Geyser , plus recorded ground-swelling indicating ongoing inflation of the underlying magma chamber. The volcanic eruptions, as well as

515-460: A U.S. Army detachment commanded by Lt.  Gustavus Doane . The expedition spent about a month exploring the region, collecting specimens, and naming sites of interest. A Montana writer and lawyer named Cornelius Hedges, who had been a member of the Washburn expedition, proposed that the region should be set aside and protected as a national park; he wrote detailed articles about his observations for

618-721: A UN World Heritage Site on September 8, 1978. The park was placed on the List of World Heritage in Danger from 1995 to 2003 due to the effects of tourism, infection of wildlife, and issues with invasive species . In 2010, Yellowstone National Park was honored with its own quarter under the America the Beautiful Quarters Program. Justin Farrell explores three moral sensibilities that motivated activists in dealing with Yellowstone. First came

721-464: A buffer that breaks apart the plume. Any heat from the plume that does make it to the surface is limited. Volcanic and tectonic actions in the region cause between 1,000 and 2,000 measurable earthquakes annually. Most are relatively minor, measuring magnitude 3 or weaker. Occasionally, numerous earthquakes are detected in a relatively short period of time, an event known as an earthquake swarm . In 1985, more than 3,000 earthquakes were measured over

824-401: A comprehensive report, including large-format photographs by William Henry Jackson and paintings by Thomas Moran . The report helped to convince the U.S. Congress to withdraw this region from public auction . On March 1, 1872, President Ulysses S. Grant signed The Act of Dedication law that created Yellowstone National Park. Hayden, while not the only person to have thought of creating

927-551: A consolidated application process through the web. YCC is a partnership between the US Department of Interior and US Department of Agriculture established by Public Law 93-408 . Since its inception, the YCC has worked with many conservation agencies throughout the country to provide educational and team building skills to young people through participation in work projects. Yellowstone National Park Yellowstone National Park

1030-437: A fierce furnace fire were burning beneath each one of them; and a hundred geysers, white torrents of boiling water and steam, like inverted waterfalls, are ever and anon rushing up out of the hot, black underworld. By 1915, 1,000 automobiles per year were entering the park, resulting in conflicts with horses and horse-drawn transportation. Horse travel on roads was eventually prohibited. The Civilian Conservation Corps (CCC),

1133-519: A group of fur trappers . After splitting up with the other trappers in 1807, Colter passed through a portion of what later became the park, during the winter of 1807–1808. He observed at least one geothermal area in the northeastern section of the park, near Tower Fall . After surviving wounds he suffered in a battle with members of the Crow and Blackfoot tribes in 1809, Colter described a place of " fire and brimstone " that most people dismissed as delirium;

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1236-466: A magnitude 4.8 earthquake struck Yellowstone, the largest recorded there since February 1980. In February 2018, more than 300 earthquakes occurred, with the largest being a magnitude 2.9. The Lava Creek eruption of the Yellowstone Caldera, which occurred 640,000 years ago, ejected approximately 1,000 cubic kilometres (240 cu mi) of rock, dust and volcanic ash into the atmosphere. It

1339-600: A magnitude of 3.9. Another swarm started in January 2010, after the Haiti earthquake and before the Chile earthquake . With 1,620 small earthquakes between January 17, 2010, and February 1, 2010, this swarm was the second-largest ever recorded in the Yellowstone Caldera. The largest of these shocks was a magnitude 3.8 that occurred on January 21, 2010. This swarm subsided to background levels by February 21. On March 30, 2014, at 6:34 AM MST ,

1442-549: A mountain of glass and yellow rock. These reports were largely ignored because Bridger was a known "spinner of yarns". In 1859, a U.S. Army Surveyor named Captain William F. Raynolds embarked on a two-year survey of the southern central Rockies . After wintering in Wyoming, in May 1860, Raynolds and his party—which included geologist Ferdinand V. Hayden and guide Jim Bridger—attempted to cross

1545-548: A once-mountainous region. At least a dozen of these eruptions were so massive that they are classified as supereruptions . Volcanic eruptions sometimes empty their stores of magma so swiftly that the overlying land collapses into the emptied magma chamber , forming a geographic depression called a caldera. The oldest identified caldera remnant straddles the border near McDermitt, Nevada–Oregon , although there are volcaniclastic piles and arcuate faults that define caldera complexes more than 60 km (37 mi) in diameter in

1648-419: A park in the region, was its first and most enthusiastic advocate. He believed in "setting aside the area as a pleasure ground for the benefit and enjoyment of the people" and warned that there were those who would come and "make merchandise of these beautiful specimens". Worrying the area could face the same fate as Niagara Falls , he concluded the site should "be as free as the air or Water". In his report to

1751-419: A period of several months. More than 70 smaller swarms were detected between 1983 and 2008. The USGS states these swarms are likely caused by slips on pre-existing faults rather than by movements of magma or hydrothermal fluids. In December 2008, continuing into January 2009, more than 500 earthquakes were detected under the northwest end of Yellowstone Lake over a seven-day span, with the largest registering

1854-459: A substantial contribution to the development of geological sciences through history". The source of the Yellowstone hotspot is controversial. Some geoscientists hypothesize that the Yellowstone hotspot is the effect of an interaction between local conditions in the lithosphere and upper mantle convection . Others suggest an origin in the deep mantle ( mantle plume ). Part of the controversy

1957-707: 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". Although it is commonly believed that the river was named for the yellow rocks seen in the Grand Canyon of the Yellowstone , the Native American name source is unclear. The human history of the park began at least 11,000 years ago when Native Americans began to hunt and fish in

2060-524: A way that could be used as a geothermal power source. If enacted, the plan would cost about $ 3.46 billion. Brian Wilcox of the Jet Propulsion Laboratory observes that such a project could incidentally trigger an eruption if the top of the chamber is drilled into. Studies and analysis may indicate that the greater hazard comes from hydrothermal activity which occurs independently of volcanic activity. Over 20 large craters have been produced in

2163-556: Is a national park of the United States located in the northwest corner of Wyoming and extending into Montana and Idaho . It was established by the 42nd U.S. Congress through the Yellowstone National Park Protection Act and signed into law by President Ulysses S. Grant on March 1, 1872. Yellowstone was the first national park in the U.S. and is also widely held to be the first national park in

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2266-584: Is a topographic feature that separates the Pacific Ocean and Atlantic Ocean water drainages. About one-third of the park lies on the west side of the divide. The origins of the Yellowstone and Snake Rivers are near each other but on opposite sides of the divide. As a result, the waters of the Snake River flow to the Pacific Ocean, while those of the Yellowstone find their way to the Gulf of Mexico . The park sits on

2369-435: Is about 2.5 times bigger than scientists had previously imagined; however, scientists believe that the proportion of molten rock in the chamber is too low to allow for another supereruption. In October 2017, research from Arizona State University indicated prior to Yellowstone's last supereruption, magma surged into the magma chamber in two large influxes. An analysis of crystals from Yellowstone's lava showed that prior to

2472-541: Is believed to be linked to the somewhat older volcanism of the Snake River Plain. Yellowstone is thus the active part of a hotspot that has moved northeast over time. The origin of this hotspot volcanism is disputed. One theory holds that a mantle plume has caused the Yellowstone hotspot to migrate northeast, while another theory explains migrating hotspot volcanism as the result of the fragmentation and dynamics of

2575-584: Is one of the largest high-elevation lakes in North America and is centered over the Yellowstone Caldera , the largest super volcano on the continent. The caldera is considered a dormant volcano . It has erupted with tremendous force several times in the last two million years. Well over half of the world's geysers and hydrothermal features are in Yellowstone, fueled by this ongoing volcanism. Lava flows and rocks from volcanic eruptions cover most of

2678-459: Is plainly visible today. Non-explosive eruptions of lava and less-violent explosive eruptions have occurred in and near the Yellowstone caldera since the last supereruption. The most recent lava flow occurred about 70,000 years ago, while a violent eruption excavated the West Thumb of Lake Yellowstone 174,000 years ago. Smaller steam explosions occur as well. An explosion 13,800 years ago left

2781-516: Is relatively recent, with calderas created by large eruptions that took place 2.1 million, 1.3 million, and 640,000 years ago. The calderas lie over the Yellowstone hotspot under the Yellowstone Plateau where light and hot magma (molten rock) from the mantle rises toward the surface. The hotspot appears to move across terrain in the east-northeast direction, and is responsible for the eastern half of Idaho 's Snake River Plain , but in fact

2884-565: 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

2987-511: Is the relatively sudden appearance of the hotspot in the geologic record. Additionally, the Columbia Basalt flows appeared at the same approximate time in the same place, prompting speculation that they share a common origin. As the Yellowstone hotspot traveled to the east and north, the Columbia disturbance moved northward and eventually subsided. An alternate theory to the mantle plume model

3090-419: Is up to 400 feet (120 m) deep and has 110 miles (180 km) of shoreline. At an elevation of 7,733 feet (2,357 m) above sea level, Yellowstone Lake is the largest high-elevation lake in North America. Forests comprise 80 percent of the land area of the park; most of the rest is grassland . The Continental Divide of North America runs diagonally through the southwestern part of the park. The divide

3193-427: The 2013 United States federal government shutdown . The expansive cultural history of the park has been documented by the 1,000 archeological sites that have been discovered. The park has 1,106 historic structures and features, and of these Obsidian Cliff and five buildings have been designated National Historic Landmarks . Yellowstone was designated an International Biosphere Reserve on October 26, 1976, and

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3296-501: The Absaroka Range . The park is 63 miles (101 km) north to south, and 54 miles (87 km) west to east by air. Yellowstone is 2,219,789 acres (8,983 km ; 3,468 sq mi) in area, larger than either of the states of Rhode Island or Delaware . Rivers and lakes cover five percent of the land area, with the largest water body being Yellowstone Lake at 87,040 acres (352 km ; 136 sq mi). Yellowstone Lake

3399-669: The Carmacks Group of southwest-central Yukon , Canada, which are interpreted to have been formed 70 million years ago by the Yellowstone hotspot. Progressively younger volcanic units, most grouped in several overlapping volcanic fields , extend from the Nevada – Oregon border through the eastern Snake River Plain and terminate in the Yellowstone Plateau. One such field, the Bruneau-Jarbidge volcanic field in southern Idaho ,

3502-490: The Committee on Public Lands , he concluded that if the bill failed to become law, "the vandals who are now waiting to enter into this wonder-land, will in a single season despoil, beyond recovery, these remarkable curiosities, which have required all the cunning skill of nature thousands of years to prepare". Hayden and his 1871 party recognized Yellowstone as a unique place that should be available for further research. He also

3605-514: The Continental Divide over Two Ocean Plateau from the Wind River drainage in northwest Wyoming. Heavy spring snows prevented their passage but had they been able to traverse the divide, the party would have been the first organized survey to enter the Yellowstone region. The American Civil War hampered further organized explorations until the late 1860s. The first detailed expedition to

3708-754: The Gallatin Range to the northwest, the Beartooth Mountains in the north, the Absaroka Range to the east, the Teton Range to the south, and the Madison Range to the west. The most prominent summit on the Yellowstone Plateau is Mount Washburn at 10,243 feet (3,122 m). Yellowstone National Park has one of the world's largest petrified forests , trees which were long ago buried by ash and soil and transformed from wood to mineral materials. This ash and other volcanic debris are believed to have come from

3811-549: The Helena Herald newspaper between 1870 and 1871. Hedges essentially restated comments made in October 1865 by acting Montana Territorial Governor Thomas Francis Meagher , who had previously commented that the region should be protected. Others made similar suggestions. An 1871 letter to Ferdinand V. Hayden from Jay Cooke , a businessman who wanted to bring tourists to the region, encouraged him to mention it in his official report of

3914-598: The Henry's Fork Caldera and depositing the Mesa Falls Tuff . Each of the three climactic eruptions released vast amounts of ash that blanketed much of central North America, falling many hundreds of miles away. The amount of ash and gases released into the atmosphere probably caused significant impacts on world weather patterns and led to the extinction of some species, primarily in North America. A subsequent caldera-forming eruption occurred about 160,000 years ago. It formed

4017-600: The Huckleberry Ridge Tuff , was the largest, and produced 2,500 times as much ash as the 1980 Mount St. Helens eruption . The next biggest supereruption formed the Yellowstone Caldera (640,000 years ago) and produced the Lava Creek Tuff . The Henry's Fork Caldera (1.2 million years ago) produced the smaller Mesa Falls Tuff , but is the only caldera from the Snake River Plain–Yellowstone hotspot that

4120-472: The International Union of Geological Sciences (IUGS) included "The Yellowstone volcanic and hydrothermal system" in its assemblage of 100 geological heritage sites around the world in a listing published in October 2022. The organization defines an IUGS Geological Heritage Site as "a key place with geological elements and/or processes of international scientific relevance, used as a reference, and/or with

4223-619: The Island Park Caldera and the Huckleberry Ridge Tuff ), the Mesa Falls eruption 1.3 million years ago (which created the Henry's Fork Caldera and the Mesa Falls Tuff ), and the Lava Creek eruption approximately 640,000 years ago (which created the Yellowstone Caldera and the Lava Creek Tuff ). The caldera was the largest known until the discovery of Apolaki Caldera in 2019, which is more than twice as wide. Volcanism at Yellowstone

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4326-412: The Lava Creek Tuff , a welded tuff geologic formation . The most violent known eruption, which occurred 2.1 million years ago, ejected 588 cu mi (2,450 km ) of volcanic material and created the rock formation known as the Huckleberry Ridge Tuff and the Island Park Caldera . A smaller eruption ejected 67 cu mi (280 km ) of material 1.3 million years ago, forming

4429-643: The Mississippi Valley , indicating that a regular obsidian trade existed between local tribes and tribes farther east. When the Lewis and Clark Expedition entered present-day Montana in 1805 they encountered the Nez Perce , Crow , and Shoshone tribes who described to them the Yellowstone region to the south, but they chose not to investigate. In 1806, John Colter , a member of the Lewis and Clark Expedition, left to join

4532-551: The Western United States . The caldera and most of the park are located in the northwest corner of the state of Wyoming . The caldera measures 43 by 28 miles (70 by 45 kilometers), and postcaldera lavas spill out a significant distance beyond the caldera proper. The caldera formed during the last of three supereruptions over the past 2.1 million years: the Huckleberry Ridge eruption 2.1 million years ago (which created

4635-512: The Yellowstone Plateau , at an average elevation of 8,000 feet (2,400 m) above sea level. The plateau is bounded on nearly all sides by mountain ranges of the Middle Rocky Mountains , which range from 9,000 to 11,000 feet (2,700 to 3,400 m) in elevation. The highest point in the park is atop Eagle Peak (11,358 feet or 3,462 metres) and the lowest is along Reese Creek (5,282 feet or 1,610 metres). Nearby mountain ranges include

4738-650: The subducted Farallon Plate in Earth's interior. The Yellowstone Caldera is the largest volcanic system in North America, and worldwide it is only rivaled by the Lake Toba Caldera on Sumatra . It has been termed a " supervolcano " because the caldera was formed by exceptionally large explosive eruptions. The magma chamber that lies under Yellowstone is estimated to be a single connected chamber, about 37 miles (60 km) long, 18 miles (29 km) wide, and 3 to 7 miles (4.8 to 11.3 km) deep. The current caldera

4841-514: The 1870s and 1880s, Native American tribes were effectively excluded from the national park. Under a half-dozen tribes had made seasonal use of the Yellowstone area- the only year-round residents were small bands of Eastern Shoshone known as " Sheepeaters ". They left the area under the assurances of a treaty negotiated in 1868, under which the Sheepeaters ceded their lands but retained the right to hunt in Yellowstone. The United States never ratified

4944-678: The Grand Canyon of the Yellowstone, where the Yellowstone River continues to carve into the ancient lava flows. The canyon is a classic V-shaped valley , indicative of river-type erosion rather than erosion caused by glaciation . Yellowstone Caldera The Yellowstone Caldera , sometimes referred to as the Yellowstone Supervolcano , is a volcanic caldera and supervolcano in Yellowstone National Park in

5047-606: The Nez Perce were friendly to the tourists and other people they encountered in the park; some were not. Nine park visitors were briefly taken captive. Despite Joseph and other chiefs ordering that no one should be harmed, at least two people were killed and several wounded. One of the areas where encounters occurred was in Lower Geyser Basin and east along a branch of the Firehole River to Mary Mountain and beyond. That stream

5150-561: The Park Protection Act, which saved the park. The Lacey Act of 1900 provided legal support for the officials prosecuting poachers. With the funding and manpower necessary to keep a diligent watch, the army developed its own policies and regulations that permitted public access while protecting park wildlife and natural resources. When the National Park Service was created in 1916, many of the management principles developed by

5253-598: The Yellowstone Supervolcano is the volcanic field that produced the latest three supereruptions from the Yellowstone hotspot; it also produced one additional smaller eruption, thereby creating the West Thumb of Yellowstone Lake 174,000 years ago. The three supereruptions occurred 2.1 million, 1.3 million, and approximately 640,000 years ago, forming the Island Park Caldera , the Henry's Fork Caldera , and Yellowstone calderas, respectively. The Island Park Caldera supereruption (2.1 million years ago), which produced

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5356-731: The Yellowstone area was the Cook–Folsom–Peterson Expedition of 1869, which consisted of three privately funded explorers. The Folsom party followed the Yellowstone River to Yellowstone Lake. The members of the Folsom party kept a journal and based on the information it reported, a party of Montana residents organized the Washburn–Langford–Doane Expedition in 1870. It was headed by the surveyor-general of Montana Henry Washburn , and included Nathaniel P. Langford (who later became known as "National Park" Langford) and

5459-477: The administration of the park was transferred to the National Park Service , which had been created the previous year. Hundreds of structures have been built and are protected for their architectural and historical significance , and researchers have examined more than a thousand indigenous archaeological sites . Yellowstone National Park spans an area of 3,468.4 sq mi (8,983 km ), with lakes, canyons, rivers, and mountain ranges . Yellowstone Lake

5562-474: The administrative records of Yellowstone, as well as resource management records, records from major projects, and donated manuscripts and personal papers. The archives are affiliated with the National Archives and Records Administration . Yellowstone National Park occupies a roughly square parcel of volcanic complex that jogs slightly beyond the northwestern corner of Wyoming. Approximately 96 percent of

5665-600: The army were adopted by the new agency. The army turned control over to the National Park Service on October 31, 1918. In 1898, the naturalist John Muir described the park as follows: However orderly your excursions or aimless, again and again amid the calmest, stillest scenery you will be brought to a standstill hushed and awe-stricken before phenomena wholly new to you. Boiling springs and huge deep pools of purest green and azure water, thousands of them, are plashing and heaving in these high, cool mountains as if

5768-594: The aspects they focus on: Recruitment for the YCC within the National Park Service is done at individual sites participating in the program. The National Park Service webpage: provides information about how to enroll in the Youth Conservation Corps. Applications may be found on the NPS webpage and must be sent to parks of interest by April 15. Enrollees are selected without regard to civil service or classification laws, rules or regulation. The Forest Service operates

5871-578: The command of George Armstrong Custer , was assigned to organize and lead an expedition to Montana and the newly established Yellowstone Park. Observations about the lawlessness and exploitation of park resources were included in Ludlow's Report of a Reconnaissance to the Yellowstone National Park . The report included letters and attachments by other expedition members, including naturalist and mineralogist George Bird Grinnell . Grinnell documented

5974-414: The continuing geothermal activity, are a result of a great plume of magma located below the caldera's surface. The magma in this plume contains gases that are kept dissolved by the immense pressure under which the magma is contained. If the pressure is released to a sufficient degree by some geological shift, then some of the gases bubble out and cause the magma to expand. This can cause a chain reaction. If

6077-608: The early 1980s. Ongoing poaching and destruction of natural resources continued unabated until the U.S. Army arrived at Mammoth Hot Springs in 1886 and built Camp Sheridan . Over the next 22 years, as the army constructed permanent structures, Camp Sheridan was renamed Fort Yellowstone . On May 7, 1894, the Boone and Crockett Club , acting through the personality of George G. Vest, Arnold Hague, William Hallett Phillips, W. A. Wadsworth, Archibald Rogers, Theodore Roosevelt , and George Bird Grinnell were successful in carrying through

6180-478: The early-to-mid-19th century, organized exploration did not begin until the late 1860s. Management and control of the park originally fell under the jurisdiction of the U.S. Department of the Interior , the first Secretary of the Interior to supervise the park being Columbus Delano . However, the U.S. Army was eventually commissioned to oversee the management of Yellowstone for 30 years between 1886 and 1916. In 1917,

6283-416: The expansion results in further relief of pressure, for example, by blowing crust material off the top of the chamber, the result is a very large gas explosion. According to analysis of earthquake data in 2013, the magma chamber is 80 km (50 mi) long and 20 km (12 mi) wide. It also has 4,000 km (960 cu mi) underground volume, of which 6–8% is filled with molten rock. This

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6386-659: The federal land-use restrictions. After the park's official formation, Nathaniel Langford was appointed as the park's first superintendent in 1872 by the Secretary of Interior Columbus Delano , the first overseer and controller of the park. Langford served for five years but was denied a salary, funding, and staff. Langford lacked the means to improve the land or properly protect the park, and without formal policy or regulations, he had few legal methods to enforce such protection. This left Yellowstone vulnerable to poachers , vandals , and others seeking to raid its resources. He addressed

6489-430: The fires, leading to a systematic re-evaluation of fire management policies. The fire season of 1988 was considered normal until a combination of drought and heat by mid-July contributed to an extreme fire danger. On " Black Saturday ", August 20, 1988, strong winds expanded the fires rapidly, and more than 150,000 acres (610 km ; 230 sq mi) burned. On October 1, 2013, Yellowstone National Park closed due to

6592-490: The foreseeable future. Recurrence intervals of these events are neither regular nor predictable." This conclusion was reiterated in December 2013 in the aftermath of the publication of a study by University of Utah scientists finding that the "size of the magma body beneath Yellowstone is significantly larger than had been thought". The Yellowstone Volcano Observatory issued a statement on its website stating: Although fascinating,

6695-505: The higher rate. Youth Conservation Corps programs are conducted for 4–10 weeks during the summer. Participants must be between 15–18 years old at the start of the program, though the age limits can vary locally. Most YCC programs are non-residential; however the National Park Service does have one residential program at Yellowstone National Park . Select Forest Service units offer residential programs as well. The Youth Conservation Corps focuses on conservation and community. These are some of

6798-467: The hotspot is much deeper than the surrounding terrain and remains stationary while the North American plate moves west-southwest over it. Over the past 16.5 million years or so, this hotspot has generated a succession of explosive eruptions and less violent floods of basaltic lava . Together these eruptions have helped create the eastern part of the Snake River Plain (to the west of Yellowstone) from

6901-541: The hydrothermal explosion that formed Mary Bay. Further research shows that very distant earthquakes reach and have effects upon the activities at Yellowstone, such as the 1992 7.3 magnitude Landers earthquake in California 's Mojave Desert that triggered a swarm of quakes from more than 800 miles (1,300 km) away, and the 2002 7.9 magnitude Denali fault earthquake 2,000 miles (3,200 km) away in Alaska that altered

7004-567: 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 . In 1978, Yellowstone was named a UNESCO World Heritage Site . Hundreds of species of mammals, birds, fish, reptiles, and amphibians have been documented, including several that are either endangered or threatened . The vast forests and grasslands also include unique species of plants. Yellowstone Park

7107-649: The land surface within the caldera moved upward as much as 8 inches (20 cm) at the White Lake GPS station. In January 2010, the USGS stated that "uplift of the Yellowstone Caldera has slowed significantly" and that uplift continues but at a slower pace. USGS, University of Utah and National Park Service scientists with the Yellowstone Volcano Observatory maintain that they "see no evidence that another such cataclysmic eruption will occur at Yellowstone in

7210-448: The last supereruption, the magma chamber underwent a rapid increase in temperature and change in composition. The analysis indicated that Yellowstone's magma reservoir can reach eruptive capacity and trigger a super-eruption within just decades, not centuries as volcanologists had originally thought. In respect of it being "well-known for its past explosive volcanic eruptions and lava flows as well for its world class hydrothermal system",

7313-469: The laws of the United States, and dedicated and set apart as a public park or pleasuring ground for the benefit and enjoyment of the people; and all persons who shall locate, or settle upon, or occupy the same or any part thereof, except as hereinafter provided, shall be considered trespassers and removed there from ... Approved March 1, 1872. Signed by: There was considerable local opposition to Yellowstone National Park during its early years. Some of

7416-420: The locals feared that the regional economy would be unable to thrive if there remained strict federal prohibitions against resource development or settlement within park boundaries and local entrepreneurs advocated reducing the size of the park so that mining, hunting, and logging activities could be developed. To this end, numerous bills were introduced into Congress by Montana representatives who sought to remove

7519-463: 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 . The park contains the headwaters of the Yellowstone River , from which it takes its historical name. Near the end of the 18th century, French trappers named the river Roche Jaune , which is probably

7622-496: The mountain country of present-day Wyoming, including the Grand Tetons , after joining F V. Hayden 's Geological Survey in 1873. Yount is the first national park ranger, and Yount's Peak, at the head of the Yellowstone River, was named in his honor. These measures still proved to be insufficient in protecting the park, as neither Norris nor the three superintendents who followed, were given sufficient manpower or resources. During

7725-469: 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. The wildfires during the summer of 1988 were the largest in the history of the park. Approximately 793,880 acres (3,210 km ; 1,240 sq mi) or 36% of the parkland was impacted by

7828-690: The new findings do not imply increased geologic hazards at Yellowstone, and certainly do not increase the chances of a 'supereruption' in the near future. Contrary to some media reports, Yellowstone is not 'overdue' for a supereruption. Media reports were more hyperbolic in their coverage. A study published in GSA Today , the monthly news and science magazine of the Geological Society of America , identified three fault zones where future eruptions are most likely to be centered. Two of those areas are associated with lava flows aged 174,000–70,000 years ago, and

7931-469: The northern entrance area in 1883, which helped to increase visitation from 300 in 1872 to 5,000 in 1883. The spur line was completed in fall of that year from Livingston to Cinnabar for stage connection to Mammoth , then in 1902 extended to Gardiner station , where passengers also switched to stagecoach . Visitors in these early years faced poor and dusty roads plus limited services, with automobiles first admitted in phases beginning only in 1915. By 1901

8034-505: The park area itself as the central part of Yellowstone is the massive caldera of a supervolcano. The park contains 290 waterfalls of at least 15 feet (4.6 m), the highest being the Lower Falls of the Yellowstone River at 308 feet (94 m). Three deep canyons are located in the park, cut through the volcanic tuff of the Yellowstone Plateau by rivers over the last 640,000 years. The Lewis River flows through Lewis Canyon in

8137-600: The park. In the northwest section of the park, new geysers were found, and many existing hot springs became turbid. It was the most powerful earthquake to hit the region in recorded history. 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

8240-479: The past 14,000 years, resulting in such features as Mary Bay, Turbid Lake , and Indian Pond, which was created in an eruption about 1300 BC. In a 2003 report, USGS researchers proposed that an earthquake may have displaced more than 77 million cubic feet (2,200,000 m ; 580,000,000 US gal) of water in Yellowstone Lake, creating colossal waves that unsealed a capped geothermal system and led to

8343-409: The poaching of buffalo , deer , elk , and antelope for hides : "It is estimated that during the winter of 1874–1875, not less than 3,000 buffalo and mule deer suffer even more severely than the elk, and the antelope nearly as much." As a result, Langford was forced to step down in 1877. Having traveled through Yellowstone and witnessed land management problems, Philetus Norris volunteered for

8446-411: The position following Langford's exit. Congress finally saw fit to implement a salary for the position, as well as to provide minimal funding to operate the park. Norris used these funds to expand access to the park, building numerous crude roads and facilities. In 1880, Harry Yount was appointed as a gamekeeper to control poaching and vandalism in the park. Yount had previously spent decades exploring

8549-455: The practical problems park administrators faced in the 1872 Report to the Secretary of the Interior and correctly predicted that Yellowstone would become a major international attraction deserving the continuing stewardship of the government. In 1874, both Langford and Delano advocated the creation of a federal agency to protect the vast park, but Congress refused. In 1875, Colonel William Ludlow , who had previously explored areas of Montana under

8652-503: The region. During the construction of the post office in Gardiner, Montana , in the 1950s, an obsidian point of Clovis origin was found that dated from approximately 11,000 years ago. These Paleo-Indians , of the Clovis culture, used the significant amounts of obsidian found in the park to make cutting tools and weapons. Arrowheads made of Yellowstone obsidian have been found as far away as

8755-487: The relatively small caldera that contains the West Thumb of Yellowstone Lake. Since the last supereruption, a series of smaller eruptive cycles between 640,000 and 70,000 years ago, has nearly filled in the Yellowstone Caldera with 80 different eruptions of rhyolitic lavas such as those that can be seen at Obsidian Cliffs and basaltic lavas which can be viewed at Sheepeater Cliff . Lava strata are most easily seen at

8858-674: The scenic resorts and baths in England, Germany, and Switzerland. THE ACT OF DEDICATION AN ACT to set apart a certain tract of land lying near the headwaters of the Yellowstone River as a public park. Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled, That the tract of land in the Territories of Montana and Wyoming ... is hereby reserved and withdrawn from settlement, occupancy, or sale under

8961-571: The south, and the Yellowstone River has carved two colorful canyons, the Grand Canyon of the Yellowstone and the Black Canyon of the Yellowstone in its journey north. Yellowstone is at the northeastern end of the Snake River Plain , a great bow-shaped arc through the mountains that extends roughly 400 miles (640 km) from the park to the Idaho-Oregon border. The volcanism of Yellowstone

9064-526: The supposedly mystical place was nicknamed " Colter's Hell ". Over the next 40 years, numerous reports from mountain men and trappers told of boiling mud, steaming rivers, and petrified trees, yet most of these reports were believed at the time to be a myth. After an 1856 exploration, mountain man Jim Bridger (also believed to be the first or second European American to have seen the Great Salt Lake ) reported observing boiling springs, spouting water, and

9167-431: The surrounding ecosystems. The Heritage and Research Center is located at Gardiner, Montana, near the north entrance to the park. The center is home to the Yellowstone National Park's museum collection, archives, research library, historian, archeology lab, and herbarium . The Yellowstone National Park Archives maintain collections of historical records of Yellowstone and the National Park Service. The collection includes

9270-561: The survey. Cooke wrote that his friend, Congressman William D. Kelley had also suggested " Congress pass a bill reserving the Great Geyser Basin as a public park forever". In 1871, eleven years after his failed first effort, Ferdinand V. Hayden was finally able to explore the region. With government sponsorship, he returned to the region with a second, larger expedition, the Hayden Geological Survey of 1871 . He compiled

9373-415: The third is a focus of present-day seismicity . In 2017, NASA conducted a study to determine the feasibility of preventing the volcano from erupting. The results suggested that cooling the magma chamber by 35 percent would be enough to forestall such an incident. NASA proposed introducing water at high pressure 10 kilometers underground. The circulating water would release heat at the surface, possibly in

9476-507: The total land area of Yellowstone National Park is located within the state of Wyoming. Another three percent is within Montana, with the remaining one percent in Idaho. Montana's portion of Yellowstone contains multiple trails, facilities and swimming holes, while the Idaho portion of the park is completely undeveloped. The irregular eastern boundary of the national park follows the height of land along

9579-534: The traditional log cabin style with design features of a modern style. During the late 1980s, most construction styles in Yellowstone reverted to the more traditional designs. After the enormous forest fires of 1988 damaged much of Grant Village , structures there were rebuilt in the traditional style. The visitor center at Canyon Village , which opened in 2006, incorporates a more traditional design as well. The 1959 Hebgen Lake earthquake just west of Yellowstone at Hebgen Lake damaged roads and some structures in

9682-507: The treaty and refused to recognize the claims of the Sheepeaters or any other tribe that had used Yellowstone. The Nez Perce band associated with Chief Joseph , numbering about 750 people, passed through Yellowstone National Park in thirteen days in late August 1877. They were being pursued by the U.S. Army and entered the national park about two weeks after the Battle of the Big Hole . Some of

9785-435: The utilitarian vision of maximum exploitation of natural resources , a characteristic of developers in the late 19th century. Second was the spiritual vision of nature inspired by Romanticism and the transcendentalists in the mid-19th century. The twentieth century saw the biocentric moral vision that focuses on the health of the ecosystem as theorized by Aldo Leopold , which led to the expansion of federally protected areas and

9888-552: The world. The park is known for its wildlife and its many geothermal features , especially the Old Faithful geyser , one of its most popular. While it represents many types of biomes , the subalpine forest is the most abundant. It is part of the South Central Rockies forests ecoregion . While Native Americans have lived in the Yellowstone region for at least 11,000 years, aside from visits by mountain men during

9991-517: Was Yellowstone's third and most recent caldera-forming eruption. Geologists closely monitor the elevation of the Yellowstone Plateau , which has been rising as quickly as 150 millimetres (5.9 in) per year, as an indirect measurement of changes in magma chamber pressure. The upward movement of the Yellowstone caldera floor between 2004 and 2008—almost 75 millimetres (3.0 in) each year—was more than three times greater than ever observed since such measurements began in 1923. From 2004 to 2008,

10094-406: Was created by a cataclysmic eruption that occurred 640,000 years ago, which released more than 240 cu mi (1,000 km ) of ash, rock and pyroclastic materials. This eruption was more than 1,000 times larger than the 1980 eruption of Mount St. Helens . It produced a caldera nearly 5 ⁄ 8  mi (1.0 km) deep and 45 by 28 miles (72 by 45 km) in area and deposited

10197-440: Was cut, and many facilities fell into disrepair. By the 1950s, visitation increased tremendously in Yellowstone and other national parks. To accommodate the increased visitation, park officials implemented Mission 66 , an effort to modernize and expand park service facilities. Planned to be completed by 1966, in honor of the 50th anniversary of the founding of the National Park Service, Mission 66 construction diverged from

10300-475: 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 . Eventually the railroads and, sometime after that, the automobile would make that possible. The park was not set aside strictly for ecological purposes. Hayden imagined something akin to

10403-662: Was formed between 10 and 12 million years ago, and the event dropped ash to a depth of one foot (30 cm) 1,000 miles (1,600 km) away in northeastern Nebraska and killed large herds of rhinoceroses , camels, and other animals at Ashfall Fossil Beds State Historical Park. The United States Geological Survey (USGS) estimates there are one or two major caldera-forming eruptions and a hundred or so lava extruding eruptions per million years, and "several to many" steam eruptions per century. The loosely defined term " supervolcano " has been used to describe volcanic fields that produce exceptionally large volcanic eruptions. Thus defined,

10506-538: Was named Nez Perce Creek in memory of their trail through the area. A group of Bannocks entered the park in 1878, alarming park Superintendent Philetus Norris. In the aftermath of the Sheepeater Indian War of 1879, Norris built a fort to prevent Native Americans from entering the national park. The Northern Pacific Railroad built a train station in Livingston, Montana , as a gateway terminus to connect to

10609-512: Was proposed in 2018. It is suggested that the volcanism may be caused by upwellings from the lower mantle resulting from water-rich fragments of the Farallon plate descending from the Cascadia subduction region , sheared off at a subducted spreading rift. Others suggest that the mantle plume could not have been a dominant force in Yellowstone volcanism due to the sinking Farallon plate, as it acts as

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