Description of Canyons

2. - an example of Erosional Landforms.
- a Canyon that got carved out by the Colorado River.
- 277 miles (446 km) long, up to 18 miles (29 km) wide and attains a
depth of over a mile (6,093 feet or 1,857 meters).
- a river valley in the Colorado Plateau that exposes
uplifted Proterozoic and Paleozoic strata, and is also one of the six
distinct physiographic sections of the Colorado Plateau province.
- known for its visually overwhelming size and its intricate and colorful
landscape.

3. - Created from exclusively erosional and weathering activities.
- Caves, arches, stacks and stumps are erosional features that are
commonly found on a headland.
- A land surface shaped by the action of erosion, especially by running
water.

4. - sometimes called “George”.
- a deep ravine between cliffs that is often carved from the
landscape by a river, wind or glacier.
- canyons were not produced by tectonic activities or natural
disasters.
- it was influenced by water and wind erosion over a long period of
geologic time.

5. Antelope Canyon
Horseshoe bend
Grand Canyon

6. - The Grand Canyon is in the northwest corner of Arizona, close to the
borders of Utah and Nevada. Most of the Grand Canyon lies within
Grand Canyon National Park and is managed by the National Park
Service, the Hualapai Tribal Nation and the Havasupai Tribe.
- The Colorado River, which flows through the canyon, touches seven
states, but the Grand Canyon National Park is within the Arizona state
borders. While Arizona is known as the Grand Canyon State, the
attached Glen Canyon National Recreation Area is in Utah and the Lake
Mead National Recreation Area borders the Grand Canyon in Nevada.

7. - The South Rim is open all year and receives 90 percent of the park’s
visitors. The South Rim has an airport and rail service and is also close
to many transportation hubs and the Arizona cities of William and
Flagstaff, as well as Las Vegas, Nev.
- The North Rim is located closer to Utah and has stunning views, but is
not nearly as accessible as the South Rim.

8. One popular attraction is the Grand Canyon Skywalk, a horseshoe-shaped
glass walkway that is 4,000 feet (1,220 meters) above the canyon floor in
the Grand Canyon West area of the main canyon.

9. - The specific geologic processes and timing that formed the Grand
Canyon spark lively debates by geologists. The general scientific
consensus, updated at a 2010 conference, holds that the Colorado River
carved the Grand Canyon beginning 5 million to 6 million years ago.

10. Francisco Vázquez de Coronado
- The first Europeans to see Grand Canyon were soldiers led by García
López de Cárdenas.
- In 1540, Francisco Vázquez de Coronado and his Spanish army traveled
northward from Mexico City in search of the Seven Cities of Cíbola. After
traveling for six months, Coronado's army arrived at the Hopi Mesas,
east of Grand Canyon.

11. John Wesley Powell
- September 23, 2003, marks 100 years since the death of one of
America's greatest explorers, John Wesley Powell.
- He it was who went down the deadly Colorado River, naming the Grand
Canyon in the process.

12. Tibor Tóth
- The Grand Canyon map was the largest and most time-consuming
relief map.
- Tibor Tóth, a Swiss-trained cartographer, worked on during his 22 years
at National Geographic.

13. The vast majority of the Grand Canyon is owned by the
federal government, held in trust for the American people and managed by
a varied collection of federal agencies.
Grazie!