Alluvial Fan
Alluvial fan explained in an easy to understand way:
Imagine you're carrying a tray full of marbles and accidentally trip, causing the marbles to scatter across the floor in a fan shape. This scattering is similar to how an alluvial fan forms when water, carrying sediment, flows down a slope and spreads out at the base. Just like the marbles spreading out when the momentum is lost and they encounter the resistance of the floor, the sediments in an alluvial fan are deposited in a fan shape as the water slows down and spreads out on flatter ground.
Practice Version
Alluvial Fan: A fan-shaped deposit formed as water flows down a slope. Alluvial fan. An alluvial fan is a triangle-shaped area where sediments spread out as a river slows down and leaves a mountain.