Silt is primarily deposited in the Mississippi River delta.

The Mississippi River Delta is known for its rich deposits of silt, a fine, fertile soil carried by the river as it flows toward the Gulf of Mexico. Over time, silt accumulates in the delta, creating the wetlands and marshes that characterize the region. This silt is crucial for supporting diverse ecosystems and agriculture, enriching the land with nutrients that make it one of the most productive areas in the U.S.