What nile is a fan shaped mud deposit at the mouth of nile river?

The fan-shaped mud deposit at the mouth of the Nile River is known as a delta, specifically the Nile Delta. This delta forms as the river slows down and spreads out upon reaching the Mediterranean Sea, depositing sediment carried from upstream. The Nile Delta is one of the world's largest river deltas and is crucial for agriculture, providing fertile land in an otherwise arid region. It supports a rich ecosystem and has been vital to human civilization for thousands of years.