Grand canyon panoramic

Panoramic view of the Grand Canyon reveals 2-billion-year-old geological layers carved by the Colorado River in Arizona.

About this subject

The Grand Canyon, located in Arizona (USA), is one of the world's most iconic gorges, stretching about 446 kilometers in length, up to 29 kilometers wide, and over 1,800 meters deep. Its geological formation began approximately 5 to 6 million years ago as the Colorado River cut through exposed rock layers. The canyon walls display a nearly complete sequence of sedimentary rocks from the Precambrian to the Permian, offering a visual record of Earth's history. Designated a UNESCO World Heritage Site in 1979, it attracts about 6 million visitors annually who explore viewpoints such as Mather Point and Desert View Watchtower. Indigenous peoples, including the Hopi and Navajo, have inhabited the region for millennia and consider the canyon sacred. Popular activities include rafting on the Colorado River and hiking the Bright Angel Trail. The canyon also serves as a natural laboratory for geologists and biologists, hosting endemic species like the Kaibab squirrel and the California condor, reintroduced to the area. The panoramic view captures the vastness and changing colors of the rocks throughout the day, a spectacle that inspired artists and explorers, including John Wesley Powell, who led the first river descent expedition in 1869.

Frequently Asked Questions

How long did the Colorado River take to form the Grand Canyon?

The Colorado River is believed to have begun carving the canyon about 5 to 6 million years ago, though recent studies suggest some erosion may be even older.

What is the maximum depth of the Grand Canyon?

The maximum depth is approximately 1,857 meters (6,093 feet), measured from the South Rim to the Colorado River.

What animals can be seen at the Grand Canyon?

Emblematic animals include the Kaibab squirrel, California condor, mule deer, and various reptiles and birds of prey.