- Created by: OrlaghMarie
- Created on: 06-05-14 17:51
- As the river passes over the soft rock, it is able to erode at a faster rate than harder rock, so a step in the river bed develops.
- As years go by, a ledge of hard rock develops.
- The water rushes over the ledge and erodes the soft rock through the force of hydraulic action and abrasion. This deepens the…