The Grand Canyon is a steep-sided canyon carved by the Colorado River in Arizona, United States.
The United States of America, commonly referred to as the United States or America, is a federal republic composed of 50 states, a federal district, five major self-governing territories, and various possessions.
A canyon or gorge is a deep cleft between escarpments or cliffs resulting from weathering and the erosive activity of a river over geologic timescales.
The Colorado River is one of the principal rivers of the Southwestern United States and northern Mexico.
Grand Canyon In Depth - 01 - More Than A View by GrandCanyonNPS
The Grand Canyon is 277 miles long, up to 18 miles wide and attains a depth of over a mile.
Experience the Grand Canyon, From Rim to River | National Geographic by National Geographic
The canyon and adjacent rim are contained within Grand Canyon National Park, the Kaibab National Forest, Grand Canyon-Parashant National Monument, the Hualapai Indian Reservation, the Havasupai Indian Reservation and the Navajo Nation.
The Navajo Nation is a semi-autonomous Native American territory covering 27,425 square miles, occupying portions of northeastern Arizona, southeastern Utah, and northwestern New Mexico in the United States.
The Havasupai Indian Reservation is a Native American reservation for the Havasupai people, surrounded entirely by the Grand Canyon National Park, in Coconino county in Arizona, United States.
At 1.6 million acres the Kaibab National Forest borders both the north and south rims of the Grand Canyon, in north-central Arizona.
President Theodore Roosevelt was a major proponent of preservation of the Grand Canyon area, and visited it on numerous occasions to hunt and enjoy the scenery.
Theodore Roosevelt Jr. was an American statesman, author, explorer, soldier, naturalist, and reformer who served as the 26th President of the United States from 1901 to 1909.
Nearly two billion years of Earth's geological history have been exposed as the Colorado River and its tributaries cut their channels through layer after layer of rock while the Colorado Plateau was uplifted.
The Colorado Plateau, also known as the Colorado Plateau Province, is a physiographic and desert region of the Intermontane Plateaus, roughly centered on the Four Corners region of the southwestern United States.
While some aspects about the history of incision of the canyon are debated by geologists, several recent studies support the hypothesis that the Colorado River established its course through the area about 5 to 6 million years ago.
Since that time, the Colorado River has driven the down-cutting of the tributaries and retreat of the cliffs, simultaneously deepening and widening the canyon.
For thousands of years, the area has been continuously inhabited by Native Americans, who built settlements within the canyon and its many caves.
The Pueblo people considered the Grand Canyon a holy site, and made pilgrimages to it.
The Puebloans or Pueblo peoples are Native Americans in the Southwestern United States, lived in the time period of 100 - 1600 AD.
The first European known to have viewed the Grand Canyon was García López de Cárdenas from Spain, who arrived in 1540.