Earth & Space
Why Canyons Cut So Deep
A small river over millions of years removes a mountain of rock. The Grand Canyon = the Colorado doing its job for ~6 My.
Look at this. A canyon nearly 2 km deep — and at the very bottom, a thin little river. How does a SMALL river cut a mile-deep gash?
Concepts you just met
ErosionSediment AbrasionSedimentary LayersGeologic Time