What is the compare and contrast of alluvial fans and deltas?

Alluvial fans are landforms created by sediment deposition at the base of a mountain, while deltas are landforms formed by deposition of sediment carried by a river where it meets a body of water. Both landforms are composed of sediment deposits, but alluvial fans are typically cone-shaped while deltas have a more complex shape with distributaries. Additionally, alluvial fans are typically found in arid or semi-arid regions, while deltas are common in areas where rivers meet oceans or lakes.