Here's how it works:

* Erosion: The faster-moving water on the outside of a river bend erodes the bank, creating a steeper, concave bank.

* Deposition: The slower-moving water on the inside of the bend deposits sediment, creating a gentler, convex bank.

Over time, this continuous cycle of erosion and deposition causes the river to wind and twist, forming meanders.

Think of it as a dance between the river's energy and the landscape. The river carves out its path by eroding the outside, and then builds up the inside with deposited sediment.