Grand Canyon Between Lakes Mead and Powell, USA – February 17th, 201236.0N 112.1W
Visible by the left edge of this image is Lake Mead, with a distinctive, 3-pronged shape. Lake Mead is the largest reservoir in the United States in maximum water capacity. It is located on the Colorado River about 30 mi (48 km) southeast of Las Vegas, Nevada, in the states of Nevada and Arizona. Formed by water impounded by the Hoover Dam, it extends 112 miles (180 km) behind the dam, holding approximately 28,500,000 acre feet (35.2 km3) of water
Visible further east is another large reservoir, Lake Powell. It is also located on the Colorado River, straddling the border between Utah and Arizona. It is the second largest man-made reservoir in the United States behind Lake Mead, storing 24,322,000 acre feet (3.0001×1010 m3) of water when full. The lake was created by the flooding of Glen Canyon by the controversial Glen Canyon Dam.
Located between the two reservoirs (best observed in full image) is the Grand Canyon, a steep-sided canyon carved by the Colorado River in the United States in the state of Arizona. The Grand Canyon is 277 miles (446 km) long, up to 18 miles (29 km) wide and attains a depth of over a mile (6,000 feet / 1,800 metres). Nearly two billion years of the 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.