- Created by: Djoumana
- Created on: 15-11-17 20:00
Waterfalls and Gorges are found in the Upper Course of a River:
- Waterfalls form where a river flows over an area of hard rock followed by an area of softer rock.
- The softer rock is eroded by hydraulic action and abrasion more than the hard rock, creating a 'step' in the river.
- As water goes over the step it erodes more and more of the softer rock.
- A steep drop is eventually created, which is called a waterfall.