National monument in Oregon, United States
John Day Fossil Beds National Monument is a U.S. national monument in Wheeler and Grant counties in east-central Oregon. Located within the John Day River basin and managed by the National Park Service, the park is known for its well-preserved layers of fossil plants and mammals that lived in the region between the late Eocene, about 45 million years ago, and the late Miocene, about 5 million years ago. The monument consists of three geographically separate units: Sheep Rock, Painted Hills, and Clarno.
The units cover a total of of semi-desert shrublands, riparian zones, and colorful badlands. About 210,000 people visited the park in 2016 to engage in outdoor recreation or to visit the Thomas Condon Paleontology Center or the James Cant Ranch Historic District.
Before the arrival of Euro-Americans in the 19th century, the John Day basin was frequented by Sahaptin people who hunted, fished, and gathered roots and berries in the region. After road-building made the valley more accessible, settlers established farms, ranches, and a few small towns along the river and its tributaries. Paleontologists have been unearthing and studying the fossils in the region since 1864, when Thomas Condon, a missionary and amateur geologist, recognized their importance and made them known globally. Parts of the basin became a National Monument in 1975.
Averaging about in elevation, the monument has a dry climate with temperatures that vary from summer highs of about to winter lows below freezing. The monument has more than 80 soil types that support a wide variety of flora, ranging from willow trees near the river to grasses on alluvial fans to cactus among rocks at higher elevations. Fauna include more than 50 species of resident and migratory birds. Large mammals like elk and smaller animals such as raccoons, coyotes, and voles frequent these units, which are also populated by a wide variety of reptiles, fish, butterflies, and other creatures adapted to particular niches of a mountainous semi-desert terrain.
Geography.
The John Day Fossil Beds National Monument consists of three widely separated units—Sheep Rock, Painted Hills, and Clarno—in the John Day River basin of east-central Oregon. Located in rugged terrain in the counties of Wheeler and Grant, the park units are characterized by hills, deep ravines, and eroded fossil-bearing rock formations. To the west lies the Cascade Range, to the south the Ochoco Mountains, and to the east the Blue Mountains. Elevations within the park range from .
 The Clarno Unit, the westernmost of the three units, consists of located west of Fossil along Oregon Route 218. The Painted Hills Unit, which lies about halfway between the other two, covers . It is situated about northwest of Mitchell along Burnt Ranch Road, which intersects U.S. Route 26 west of Mitchell. These two units are entirely within Wheeler County. The remaining of the park, the Sheep Rock Unit, are located along Oregon Route 19 and the John Day River upstream of the unincorporated community of Kimberly. This unit is mostly in Grant County; a small part extends into Wheeler County. The Sheep Rock Unit is further subdivided into the Mascall Formation Overlook, Picture Gorge, the James Cant Ranch Historic District, Cathedral Rock, Blue Basin, and the Foree Area. Some of these are separated from one another by farms, ranches, and other parcels of land that are not part of the park.
 The park headquarters and main visitor center, both in the Sheep Rock Unit, are northeast of Bend and southeast of Portland by highway. The shortest highway distances from unit to unit within the park are Sheep Rock to Painted Hills, ; Painted Hills to Clarno, , and Clarno to Sheep Rock, .
The John Day River, a tributary of the Columbia River, flows generally west from the Strawberry Mountains before reaching the national monument. It turns sharply north between the Mascall Formation Overlook and Kimberly, where the North Fork John Day River joins the main stem. Downstream of Kimberly, the river flows generally west to downstream of the unincorporated community of Twickenham, and generally north thereafter. Rock Creek enters the river at the north end of Picture Gorge. Bridge Creek passes through Mitchell, then north along the eastern edge of the Painted Hills Unit to meet the John Day downstream of Twickenham. Intermittent streams in the Clarno Unit empty into Pine Creek, which flows just beyond the south edge of the unit and enters the John Day upstream of the unincorporated community of Clarno.
History.
Early inhabitants of north-central Oregon included Sahaptin-speaking people of the Umatilla, Wasco, and Warm Springs tribes as well as the Northern Paiutes, speakers of a Uto-Aztecan (Shoshonean) language. All were hunter-gatherers competing for resources such as elk, huckleberries, and salmon. Researchers have identified 36 sites of related archeological interest, including rock shelters and cairns, in or adjacent to the John Day Fossil Beds National Monument. Most significant among the prehistoric sites are the Picture Gorge pictographs, consisting of six panels of rock art in the canyon at the south end of the Sheep Rock Unit. The art is of undetermined origin and age but is "centuries old".
The John Day basin remained largely unexplored by non-natives until the mid-19th century. Lewis and Clark noted but did not explore the John Day River while traveling along the Columbia River in 1805. John Day, for whom the river is named, apparently visited only its confluence with the Columbia in 1812. In 1829, Peter Skene Ogden, working for the Hudson's Bay Company (HBC), led a company of explorers and fur trappers along the river through what would later become the Sheep Rock Unit. John Work, also of the HBC, visited this part of the river in 1831.
In the 1840s, thousands of settlers, attracted in part by the lure of free land, began emigrating west over the Oregon Trail. Leaving drought, worn-out farms, and economic problems behind, they emigrated from states like Missouri, Illinois, and Iowa in the Midwest to Oregon, especially the Willamette Valley in the western part of the state. After passage of the Homestead Act of 1862 and the discovery of gold in the upper John Day basin, a fraction of these newcomers abandoned the Willamette Valley in favor of eastern Oregon. Some established villages and engaged in subsistence farming and ranching near streams. Settlement was made more practical by a supply route from The Dalles on the Columbia River to gold mines at Canyon City in the upper John Day valley. By the late 1860s, the route became formalized as The Dalles Military Road, which passed along Bridge Creek and south of Sheep Rock. Clashes between natives and non-natives and the desire of the U.S. Government to populate the region with Euro-Americans led to the gradual removal of native residents to reservations, including three in north-central Oregon: Warm Springs, Burns Paiute, and Umatilla.
In 1864, a company of soldiers sent to protect mining camps from raids by Northern Paiutes discovered fossils in the Crooked River region, south of the John Day basin. One of their leaders, Captain John M. Drake, collected some of these fossils for Thomas Condon, a missionary pastor and amateur geologist who lived in The Dalles. Recognizing the scientific importance of the fossils, Condon accompanied soldiers traveling through the region. He discovered rich fossil beds along Bridge Creek and near Sheep Rock in 1865. Condon's trips to the area and his public lectures and reports about his finds led to wide interest in the fossil beds among scientists such as Edward Drinker Cope of the Academy of Natural Sciences. One of them, paleontologist Othniel C. Marsh of Yale, accompanied Condon on a trip to the region in 1871. Condon's work led to his appointment in 1872 as Oregon's first state geologist and to international fame for the fossil beds. Specimens from the beds were sent to the Smithsonian Institution and other museums worldwide, and by 1900 more than 100 articles and books had been published about the John Day Fossil Beds. During the first half of the 20th century, scientists such as John C. Merriam, Ralph Chaney, Frank H. Knowlton, and Alonzo W. Hancock continued work in the fossil beds, including those discovered near Clarno in about 1890.
Remote and arid, the John Day basin near the fossil beds was slow to attract homesteaders. The first settler in what became the Sheep Rock Unit is thought to have been Frank Butler, who built a cabin along the river in 1877. In 1881, Eli Casey Officer began grazing sheep on a homestead claim in same general area. His son Floyd later lived there with his family and sometimes accompanied Condon on his fossil hunts. In 1910, James and Elizabeth Cant bought from the Officer family. and converted it to a sheep ranch, which was eventually expanded to a sheep-and-cattle ranch of about .
 Merriam, a University of California paleontologist who had led expeditions to the region in 1899 and 1900, encouraged the State of Oregon to protect the area. In the early 1930s the state began to buy land for state parks at Picture Gorge, the Painted Hills, and Clarno that later became part of the national monument. In 1951 the Oregon Museum of Science and Industry established Camp Hancock, a field school for young students of geology, paleontology, and other sciences, on public lands surrounded by what would later become the Clarno Unit. In 1974 Congress authorized the National Park Service to establish the national monument, and President Gerald R. Ford signed the authorization. After the State of Oregon had completed the land transfer of the three state parks to the federal government, the monument was officially established on October 8, 1975.
The Cant Ranch House and associated land and outbuildings were listed on the National Register of Historic Places as the James Cant Ranch Historic District in 1984. After the monument opened in 1975, the ranch house served as headquarters for all three units. In 2005, the lower floor of the ranch house was opened to the public; it features exhibits about the cultural history of the region. The Thomas Condon Paleontology Center, a $7.5 million museum and visitor center at the Sheep Rock Unit, also opened in 2005. Among the center's offerings are displays of fossils, murals depicting life in the basin during eight geologic times ranging from about 45 million to about 5 million years ago, and views of the paleontology laboratory.
In March 2011, the Park Service installed two webcams at the Sheep Rock Unit. Both transmit continuous real-time images; one shows the paleontology lab at the Condon Center and the other depicts Sheep Rock and nearby features. In June 2011, work was finished on a new ranger residence in the Painted Hills Unit that makes the unit almost carbon-neutral. Solar panels generate enough electricity to power the house as well as the ranger's electric vehicle, on loan from its manufacturer for a year. The project is part of ongoing efforts to make the whole park carbon-neutral.
Geology and paleontology.
The John Day Fossil Beds National Monument lies within the Blue Mountains physiographic province, which originated during the late Jurassic and early Cretaceous, about 118 to 93 million years ago. Northeastern Oregon was assembled in large blocks (exotic terranes) of Permian, Triassic, and Jurassic rock shifted by tectonic forces and accreted to what was then the western edge of the North American continent, near the Idaho border. By the beginning of the Cenozoic era, 66 million years ago, the Blue Mountains province was uplifting (that is, was being pushed higher by tectonic forces), and the Pacific Ocean shoreline, formerly near Idaho, had shifted to the west.
Volcanic eruptions about 44 million years ago during the Eocene deposited lavas accompanied by debris flows (lahars) atop the older rocks in the western part of the province. Containing fragments of shale, siltstone, conglomerates, and breccias, the debris flows entombed plants and animals caught in their paths; the remnants of these ancient flows comprise the rock formations exposed in the Clarno Unit. Preserved in the Clarno Nut Beds are fossils of tropical and subtropical nuts, fruits, roots, branches, and seeds. The Clarno Formation also contains bones, palm leaves longer than , avocado trees, and other subtropical plants from 50 million years ago, when the climate was warmer and wetter than it is in the 21st century. Large mammals that inhabited this region between 50 and 35 million years ago included browsers such as brontotheres and amynodonts, scavengers like the hyaenodonts, as