Interesting information
The river is eroding the banks on the outside bends of the meanders. On the inside bends the river has less force and so deposits sediment, particularly heavier materials such as gravel. By this action the river migrates and lays down a layer of mainly gravelly sediment behind it. At times of very high flow the river spills over its banks and spreads over the floodplain depositing sand and loam over the coarser sediments left by the meandering channel.