In the process of deposition, the large, heavy sediment, such as boulders and pebbles is deposited before the finer sediments such as silt and clay.
How River Deposition Takes Place - Running Water
When the erosive power of a river decreases, deposition of its load takes place. As a matter of fact, deposition may take place at any point in a river's course, although it is more pronounced in the middle and lower courses of a river. This is because the velocity of a river is lower in the middle or lower course than in the upper course. Deposition also takes place on the inside of meanders where there is a fall in the gradient. It also takes place when a river flows through an arid region where evaporation is high and also where a large river discharges its water into lake or sea.
