The river begins to meander. The fastest flow is on the outside bend and the slowest flow is on the inside bend.
The fastest flow is on the outside bend, which results in Erosion on the side of the channel. The slower water is on the inside bend which causes Deposition.
This causes the meander to shift (migrate) and the two outside bends get closer together. As these processes continue, it creates a small area of land separating the neck of the meander. This is broken through, often in flood.
The river follows the shortest course, which leaves an Oxbow Lake without a water supply.
Deposition continues until the Oxbow Lake becomes marshy.
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