Waterfalls and Gorges
Waterfalls and gorges are closely linked as erosional features. Explore how each are formed and the different types of erosion at work. Earth Science - Geology - Learning Points. 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. A Twig Context Film. Reinforce and extend the learning required by the curriculum. Twig’s context films show abstract concepts in action in the real world.
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