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 ...

For decades, many scientists assumed that rivers were the main sculptors of submarine canyons, the deep valleys that cut into the ocean floor near continents. A new global analysis published in June ...