2. Canyons are formed by a river that carries away soft rock and soil The rivers carve canyons in the earth when they flow through the soft rock of the canyon.
3. The Grand Canyon has had the Colorado River running through it for more than 60 million years!
4. A canyon is a deep valley with steep sides or walls that is made up of sandstone, soft rock, and granite. Erosion actually helps make a canyon! The Grand Canyon is in Arizona!