A quick word about the place...
Petrified Forest National Park is a United States national park in Navajo and Apache counties in northeastern Arizona. Named for its large deposits of petrified wood, the park covers about 146 square miles (380 km2), encompassing semi-desert shrub steppe as well as highly eroded and colorful badlands.
The Painted Desert Visitor Center, designed by modernist architect Richard Neutra, is part of the Painted Desert Community Complex Historic District and is on the National Register of Historic Places. Eight other sites within the park are also on the National Register, including the Painted Desert Inn and associated cabins, the Agate House Pueblo, the Painted Desert Petroglyphs and Ruins Archeological District, Newspaper Rock Petroglyphs Archeological District, Puerco Ruins and Petroglyphs, the Flattops Site (an archeological site), the Twin Buttes Archeological District, and the 35th Parallel Route (also known as the Beale Camel...
Petrified Forest National Park is a United States national park in Navajo and Apache counties in northeastern Arizona. Named for its large deposits of petrified wood, the park covers about 146 square miles (380 km2), encompassing semi-desert shrub steppe as well as highly eroded and colorful badlands.
The Painted Desert Visitor Center, designed by modernist architect Richard Neutra, is part of the Painted Desert Community Complex Historic District and is on the National Register of Historic Places. Eight other sites within the park are also on the National Register, including the Painted Desert Inn and associated cabins, the Agate House Pueblo, the Painted Desert Petroglyphs and Ruins Archeological District, Newspaper Rock Petroglyphs Archeological District, Puerco Ruins and Petroglyphs, the Flattops Site (an archeological site), the Twin Buttes Archeological District, and the 35th Parallel Route (also known as the Beale Camel Trail). The Painted Desert Inn was upgraded to a National Historic Landmark in 1987.
The desert is composed of stratified layers of easily erodible siltstone, mudstone, and shale of the Triassic Chinle Formation. These fine grained rock layers contain abundant iron and manganese compounds which provide the pigments for the various colors of the region. Thin resistant lacustrine limestone layers and volcanic flows cap the mesas. Numerous layers of silicicvolcanic ash occur in the Chinle and provide the silica for the petrified logs of the area. The erosion of these layers has resulted in the formation of the badlands topography of the region.
More than 400 species of plants, dominated by grasses such as bunchgrass, blue grama, and sacaton, are found in the park. Fauna include larger animals such as pronghorns, coyotes, and bobcats; many smaller animals such as deer mice; snakes; lizards; seven kinds of amphibians, and more than 200 species of birds, some of which are permanent residents and many of which are migratory. About half of the park is designated wilderness.
Some of the larger animals roaming the grasslands include pronghorns, black-tailed jackrabbits (hares), Gunnison's prairie dogs, coyotes, bobcats and foxes. Pronghorns, the fastest land animals in North America, are capable of 60-mile-per-hour (97 km/h) sprints.
The Petrified Forest is known for its fossils, especially fallen trees that lived in the Late Triassic, about 225 million years ago. The sediments containing the fossil logs are part of the widespread and colorful Chinle Formation, from which the Painted Desert gets its name. Beginning about 60 million years ago, the Colorado Plateau, of which the park is part, was pushed upward by tectonic forces and exposed to increased erosion. All of the park's rock layers above the Chinle, except geologically recent ones found in parts of the park, have been removed by wind and water. In addition to petrified logs, fossils found in the park have included Late Triassic ferns, cycads, ginkgoes, and many other plants as well as fauna including giant reptiles called phytosaurs, large amphibians, and early dinosaurs. Paleontologists have been unearthing and studying the park's fossils since the early 20th century.
The park's earliest human inhabitants arrived at least 8,000 years ago. By about 2,000 years ago, they were growing corn in the area and shortly thereafter building pit houses in what would become the park. Later inhabitants built above-ground dwellings called pueblos. Although a changing climate caused the last of the park's pueblos to be abandoned by about 1400 CE, more than 600 archeological sites, including petroglyphs, have been discovered in the park. In the 16th century, Spanish explorers visited the area, and by the mid-19th century a U.S. team had surveyed an east–west route through the park and noted the petrified wood. Later roads and a railway followed similar routes and gave rise to tourism and, before the park was protected, to private removal of the park's fossils. Theft of petrified wood remains a problem in the 21st century.
The visitor center, which is near the north entrance to the park, offers visitor information and shows a 20-minute orientation movie, "Timeless Impressions", once every half-hour. It has a bookstore, exhibits, a restaurant open from 8 a.m. to 3 p.m., a gift shop, a gas station, a post office open from 11 a.m. to 1 p.m. Monday through Friday, a postal drop box, and public restrooms. The Rainbow Forest Museum complex 2 miles (3.2 km) north of the park's south entrance offers services including information and "Timeless Impressions" showings once every half-hour. It has a bookstore, fossil exhibits, an interactive Triassic Virtual Tour, limited food service, a gift shop, and public restrooms. The Painted Desert Inn, 2 miles (3.2 km) north of the Painted Desert Visitor Center, offers visitor information. It has a bookstore, museum exhibits (including the building itself), and public restrooms.
No campgrounds or overnight lodging are available in the park, although nearby communities such as Holbrook offer motels and other accommodations.Overnight parking is not allowed except in the case of backpackers with wilderness hiking permits. Sightseeing is available by private automobile, motorcycle, commercial tour, bicycle, and hiking. The park road, parking lots, and turn-outs are big enough to accommodate large recreational vehicles. Off-road vehicle travel, including by mountain bike, is not allowed. Bicycles may use only paved roads—the 28-mile (45 km) park road and the 3.5-mile (5.6 km) loop around Blue Mesa.
The park's seven maintained hiking trails, some paved, vary in length from less than 0.5 miles (0.8 km) to nearly 3 miles (4.8 km). Pets are allowed on these trails if kept on a leash, but bicycles are not. These named trails are Painted Desert Rim, Puerco Pueblo, Blue Mesa, Crystal Forest, Giant Logs, Long Logs, and Agate House. Hikers and backpackers may also visit the park's wilderness areas. Free permits are required for overnight stays; they are issued from the Painted Desert Visitor Center, Painted Desert Inn, and Rainbow Forest Museum. Most backpackers enter the wilderness at the north end of the park, where parking and an access trail are available at Painted Desert Inn. Group camping is limited to eight people. Horseback riding is allowed in the wilderness areas; water for horses is available at the service station near the Painted Desert Visitor Center. Riders and hikers are asked to travel along dry washes as much as possible to reduce the impact on fragile desert soils.
Rangers offer a variety of programs about the park. Regularly scheduled events include a Painted Desert Inn tour, a Triassic program at the Rainbow Forest Museum sunroom, a talk or walk along the Giant Logs Trail behind the museum, and a Puerco Pueblo guided walk. The park hosts special events related to Earth Science Week and National American Indian Heritage Month. On Saturdays from Memorial Day weekend through Labor Day at the Painted Desert Inn, artisans from the region give cultural demonstrations related to ancient peoples, intertribal relationships, and European-descent cultures. For students and teachers, the rangers offer educational materials and field-trip talks. Artists-in-residence work in the park between May and November.
The park's headquarters are about 26 miles (42 km) east of Holbrook along Interstate 40 (I-40), which parallels a railroad line, the Puerco River, and historic U.S. Route 66, all crossing the park roughly east–west. The site, the northern part of which extends into the Painted Desert, was declared a National Monument in 1906 and a national park in 1962. About 600,000 people visit the park each year and take part in activities including sightseeing, photography, hiking, and backpacking.
Average summer daytime temperatures range from 90 °F (32 °C) to over 100 °F (38 °C). Because the clear skies of the park allow for rapid cooling at night, summer lows are sometimes 40 °F (22 °C) below the daily highs. July is the warmest month, with an average high of 92 °F (33 °C) and an average low of 60 °F (16 °C). January is the coldest month, when highs average 48 °F (9 °C) and lows average 21 °F (−6 °C). The highest recorded temperature was 107 °F (42 °C) in 1998, and the lowest was −27 °F (−33 °C) in 1971.
Winter winds can reach 60 miles per hour (97 km/h). Summer breezes are lighter, but the 10-mile-per-hour (16 km/h) average wind causes frequent sandstorms and dust devils, some of which reach altitudes of several thousand feet.
Rain is heaviest from July through September, when about half of the park's annual average precipitation falls during short, violent thunderstorms. August is generally the wettest month. At an elevation of more than 5,000 feet (1,500 m),Petrified Forest National Park has a chance of light snow from October through March, although snow cover rarely persists. The average relative humidity of the area is well below 50 percent and at times less than 15 percent.
The park is open every day except Christmas (December 25) on a schedule that varies slightly with the seasons. In 2010, it and its Painted Desert Visitor Center and Rainbow Forest Museum were open from 7 a.m. to 7 p.m. from May 9 through September 6 but opened as early as 8 a.m. and closed as late as 5 p.m. during other parts of the year. The Painted Desert Inn (an historic museum and bookstore) is open from 9 a.m. to 5 p.m. year-round except Christmas. Park clocks are always set to Mountain Standard Time, as Arizona does not observe Daylight Saving Time.
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