The water pressure of a river can cut deep into a riverbed. Sediments from the riverbed are carried downstream, creating a deep, narrow channel. This process, known as downcutting, represents the ...

Steep-sided underwater canyons on the continental margin bordering the Pacific Ocean off the US West Coast (State of Washington). These geological features were formed by erosion processes on the ...

The Grand Canyon in Arizona got carved by water over millions of years of slow but steady erosion. Two similarly-sized canyons on the moon got carved by flying rocks in about ten minutes. That's ...

Discover the world's 5 deepest canyons, including the Yarlung Tsangpo in China and the Kali Gandaki in Nepal. Learn about ...