Arizona

Arizona (ⁱ/ɛrɪˈzoʊnə/; /ærɪˈzoʊnə/) (Navajo: Hoozdo Hahoodzo; O'odham: Alĭ ṣonak) is a state in the southwestern region of the United States. It is also part of the Western United States and of the Mountain West states. It is the sixth largest and the 14th most populous of the 50 states. Its capital and largest city is Phoenix. Arizona is one of the Four Corners states. It has borders with New Mexico, Utah, Nevada, California, and Mexico, and one point in common with the southwestern corner of Colorado. Arizona's border with Mexico is 389 miles (626 km) long, on the northern border of the Mexican states of Sonora and Baja California.

Arizona is the 48th state and last of the contiguous states to be admitted to the Union, achieving statehood on February 14, 1912. It was previously part of the territory of Alta California in New Spain before being passed down to independent Mexico and later ceded to the United States after the Mexican–American War. The southernmost portion of the state was acquired in 1853 through the Gadsden Purchase.

Mesa, Arizona

Mesa (/ˈmeɪsə/ MAY-sə) is a city in Maricopa County, in the State of Arizona and is a suburb located about 20 miles (32 km) east of Phoenix. Mesa is the central city of the East Valley section of the Phoenix Metropolitan Area. It is bordered by Tempe on the west, the Salt River Pima-Maricopa Indian Community on the north, Chandler and Gilbert on the south, and Apache Junction on the east. As of the 2010 Census Mesa became Arizona's center of population.

Mesa is the third-largest city in Arizona, after Phoenix and Tucson, and the 38th-largest city in the US. The city is home to 439,041 people as of 2010 according to the Census Bureau. Mesa is home to numerous higher education facilities including Polytechnic campus of Arizona State University.

History

The history of Mesa dates back at least 2,000 years to the arrival of the Hohokam people. The Hohokam, whose name means "All Used Up" or "The Departed Ones", built the original canal system. The canals were the largest and most sophisticated in the prehistoric New World. Some were up to 90 feet (27 m) wide and ten feet deep at their head gates, extending for as far as 16 miles (26 km) across the desert. By A.D. 1100 water could be delivered to an area over 110,000 acres (450 km²), transforming the Sonoran Desert into an agricultural oasis. By A.D. 1450, the Hohokam had constructed hundreds of miles of canals many of which are still in use today.

National park

A national park is a park in use for conservation purposes. Often it is a reserve of natural, semi-natural, or developed land that a sovereign state declares or owns. Although individual nations designate their own national parks differently, there is a common idea: the conservation of 'wild nature' for posterity and as a symbol of national pride. An international organization, the International Union for Conservation of Nature (IUCN), and its World Commission on Protected Areas, has defined "National Park" as its Category II type of protected areas.

While this type of national park had been proposed previously, the United States established the first "public park or pleasuring-ground for the benefit and enjoyment of the people", Yellowstone National Park, in 1872. Although Yellowstone was not officially termed a "national park" in its establishing law, it was always termed such in practice and is widely held to be the first and oldest national park in the world. The first area to use "national park" in its creation legislation was the US's Mackinac Island, in 1875. Australia's Royal National Park, established in 1879, was the world's third official national park. In 1895 ownership of Mackinac Island was transferred to the State of Michigan as a state park and national park status was consequently lost. As a result, Australia's Royal National Park is by some considerations the second oldest national park now in existence.

Mesa

Mesa (Portuguese and Spanish for table) is the American English term for tableland, an elevated area of land with a flat top and sides that are usually steep cliffs. It takes its name from its characteristic table-top shape. It may also be called a table hill, table-topped hill or table mountain. It is larger than a butte, which it otherwise resembles closely.

It is a characteristic landform of arid environments, particularly the Western and Southwestern United States in badlands and mountainous regions ranging from Washington and California to the Dakotas and Texas. Examples are also found in many other nations including Spain, Sardinia, North and South Africa, Arabia, India, and Australia.

Grand Mesa is a large mesa located in western Colorado in the Southwest United States. Cerro Negro is a mesa in Argentina.

The term mesa is used throughout the United States to describe a flat-topped mountain or hill.

Formation

Mesas form by weathering and erosion of horizontally layered rocks that have been uplifted by tectonic activity. Variations in the ability of different types of rock to resist weathering and erosion cause the weaker types of rocks to be eroded away, leaving the more resistant types of rocks topographically higher than their surroundings. This process is called differential erosion. The most resistant rock types include sandstone, conglomerate, quartzite, basalt, chert, limestone, lava flows and sills. Lava flows and sills, in particular, are very resistant to weathering and erosion, and often form the flat top, or caprock, of a mesa. The less resistant rock layers are mainly made up of shale, a softer rock that weathers and erodes more easily.

Canyonlands National Park

Canyonlands National Park is a U.S. National Park located in southeastern Utah near the town of Moab. It preserves a colorful landscape eroded into countless canyons, mesas, and buttes by the Colorado River, the Green River, and their respective tributaries. Legislation creating the park was signed into law by President Lyndon Johnson on September 12, 1964.

The park is divided into four districts: the Island in the Sky, the Needles, the Maze, and the combined rivers—the Green and Colorado—which carved two large canyons into the Colorado Plateau. While these areas share a primitive desert atmosphere, each retains its own character. Author Edward Abbey, a frequent visitor, described the Canyonlands as "the most weird, wonderful, magical place on earth—there is nothing else like it anywhere."

Recreation

Canyonlands is a popular recreational destination. Since 2007, more than 400,000 people have visited the park each year with a record of 542,431 visitors in 2014. The geography of the park is well suited to a number of different recreational uses. Hikers, mountain bikers, backpackers, and four-wheelers all enjoy traveling the rugged, remote trails within the Park. The White Rim Road traverses the White Rim Sandstone level of the park between the rivers and the Island in the Sky. Since 2015, day-use permits must be obtained before travelling on the White Rim Road due to the increasing popularity of driving and bicycling along it. The park service's intent is to provide a better wilderness experience for all visitors while minimizing impacts on the natural surroundings.