The world's largest and most colorful concentrations of petrified wood.
Mostly of the petrified wood is of species Araucarioxylon arizonicum.
Petrified Forest National Park, Arizona.
Petrified Forest National Park.
The Weatherford Hotel is a historic hotel in the downtown district of Flagstaff.
The Grand Canyon is a very colorful, steep-sided gorge, carved by the Colorado River.
The Grand Canyon was created by the Colorado River over 6 million years.
The Grand Canyon is 277 miles (446 km) long, ranges in width from 4 to 18 miles (6.4 to 24 kilometers), and attains a depth of more than a mile (1.6 km).
Nearly two billion years of the Earth's 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.
Cedar Ridge, South Kaibab hiking trail in Grand Canyon National Park.
Geologically it is significant because of the thick sequence of ancient rocks that are beautifully preserved and exposed in the walls of the canyon.
Grand Canyon is also one of the most spectacular examples of natural erosion in the world.
Horseshoe Bend is a horseshoe-shaped meander of the Colorado River located near the town of Page.
Inside Upper Antelope Canyon, Page, Arizona.
HDR image of Upper Antelope Canyon, Page, Arizona.
Antelope Canyon is a slot canyon in the American Southwest that was formed by erosion of Navajo Sandstone, primarily due to flash flooding and secondarily due to other Sub-aerial processes.