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Interlocking spurs-
Interlocking spurs
- Rapids
- Waterfall
- Plunge pool
- Gorges
The volume of water is small and energy is used to overcome friction therefore, the river has little energy to erode the banks. The river thus have to flow past any barrier in its path such as spurs. In the process of doing so, it develop a winding course. As the river past alternate spurs on both its sides, it appear to be interlock.
RapidsRapids occur when it past a series of alternating
soft and hard rock. There would be sudden fall of water along parts of the river
and the speed of the river is usually fast due to the change in gradient. The
more resistant hard rock would not be eroded as fast as the soft rock and therefore,
there is a different in level. 
Waterfall is a sudden fall of water along a river and the water falls vertically. There are many ways in which waterfalls are formed. Famous waterfalls in the world include the Niagara fall on the Niagara River and the Victoria fall on the Zambezi River
Plunge
PoolPlunge pools are found at the foot of waterfall. It is a dent in the riverbed just below the site where the water falls. This dent can be enlarged by hydraulic action of the falling water. There are also rock fragments in the plunge pool and the pounding action of the water, swirl the rock and abrasion takes place to further enlarges and deepens the plunge pool.
A gorge is a narrow, steep-sided valley or canyon.
A gorge may be formed in a 
number
of ways. As a waterfall retreats upstream, erosion cuts away the rock at the
base of a river valley. When a river once again cuts downwards into its channel,
in response to a fall in sea level, a gorge can also be formed. Gorges are commonly
found in limestone country, where they may be formed by the collapse of underground
caverns. A very famous gorge is the Grand Canyon.
