1. Wind: Wind has the ability to pick up and transport smaller particles like sand and silt, leaving behind larger particles like gravel. This sorting process creates distinct layers of sediment, with the finest particles being deposited furthest from the source. This is evident in the formation of sand dunes, where the wind creates distinct layers of varying grain sizes.
2. Water: Water currents, similar to wind, can sort sediments based on size. Faster-moving water carries larger particles, while slower-moving water deposits smaller particles. This is seen in rivers and streams, where the larger sediments settle at the bottom, while the finer silt and clay are carried further downstream. The sorting process also contributes to the formation of deltas and floodplains.
