Classroom visuals
Film info
Film summary
Waterfalls and gorges are closely linked as erosional features. Explore how each are formed and the different types of erosion at work.Key facts
- There are four forms of river erosion: attrition, abrasion, hydraulic action and corrosion.
- In the upper course of a river vertical erosion creates steep valleys, and uneven riverbeds form rapids and interlocking spurs.
- Waterfalls are formed when a soft layer of rock is eroded beneath a harder layer of rock creating an overhang.
- When the overhang eventually collapses and the waterfall retreats, a steep-sided gorge remains.
Transcript
As rivers gush down to the sea, they carve out dramatic gullies and impressive waterfalls.
These are known as erosional landforms.
Forms of Erosion
Rocks and stones, carried by river water, constantly collide with each other, breaking down into smaller, rounder pieces.
This is called attrition.
Attrition
These rock pieces collide with the riverbank, wearing …
Please log in to view and download the complete transcript.
