What are riverbanks formed by?

riverbanks are formed by flowing water.The surface of the Earth can change

due to both slow and rapid processes.

For example, the formation of a riverbank due erosion by flowing water is a slow process that can take a very long time. Riverbanks are the dirt walls found on both sides of a river. They hold the river inside, except during times of flooding.

Riverbanks are formed as

flowing water

cuts deeper into the soil and rock below. The pieces of rock and soil that the river scours away are moved further down the river, where they are later deposited.