What is the name for a triangular-shaped deposit of sand and soil at the mouth of some rivers?

The correct answer is "delta." The name for a triangular-shaped deposit of sand and soil at the mouth of some rivers is called delta. Delta is a landform that forms from deposition of sediment carried by a river as the flow leaves its mouth and enters slower-moving or standing water.

Answer the zagros mountains, stretch across western iran and are located next to the khuzestan plain; answer( zagros mountains