Waterfall Diagram Formation. When the river flows through an area that is mostly made up of bedrock the process of erosion starts to happen. Waterfalls form in rivers that are young.
This leaves a layer of hard rock which overhangs the layer of soft rock 2. Soft rock is undercut 1. When the river flows through an area that is mostly made up of bedrock the process of erosion starts to happen.
The water flows over the overhang and creates a plunge pool in the soft rock below.
This is due to the channel being deep and narrow to allow for the formation of the waterfall. The diagram above shows the formation of a waterfall. The less resistant rock is more quickly worn away due to differential erosion. This leaves a layer of hard rock which overhangs the layer of soft rock 2.
