WEEK 24: NATURAL WONDERS (Celia Mantilla Fernández)
Grand Canyon is an exceptionally deep , steep-walled canyon in north-western Arizona, United States. Formed by the eroding action of the Colorado River, the Grand Canyon is about 443 km (227 mi) long, 8 to 29 km (5 to 18 mi) wide, and more than 1.6 km (1 mi) deep. The entire canyon is extremely beautiful , containing towering buttes, mesas and valleys within main gorge. A spectacular section of the canyon, together with plateau areas on either side, is preserved as the Grand Canyon national Park, which receives about 4 million visitors a year. The Grand Canyon stretches 349 km (217 mi) across the state’s Colorado Plateau and averages 16 km (10 mi) in width. Beautiful rock formations of layered limestone, sandstone, shale and other rock rise from the canyon floor, which is more than 1.6 km (1 mi) deep. This formation is known as “The Alligator”. The Grand Canyon cuts steeply through an arid plateau region that lies between about 1.525 and 2.745 m (5,000 and 9,000 ft) above sea l...