Highly fertile silt. The structure of the soil particles is like sand.
It is called a delta
clay
A river delta is formed from the deposition of sediments carried by a river as the river enters an ocean, sea, lake, or another river. This is because the flow velocity decreases significantly and the fluid loses the ability to transport sediment.
The two kind of land forms created by deposit of sediment are: alluvial fan and delta.
dark, rich and soft
sedimentary rocks
A Delta about 160 kms wide including about 500 channels.
River erosion is caused by the flow of water carrying sediment that erodes the riverbanks and bed. Tributaries erode the land they flow through as well, contributing sediment to the main river. Valleys are carved by river erosion over time, shaping the landscape.
A wave-dominated delta.
Moving water in a river can pick up sediment and carry it along in a suspended load. This includes small particles like silt and clay that are held up and transported within the flow of the water.
The sediment that consists primarily of material grains eroded from rocks on land is called clastic sediment. This type of sediment is formed from the weathering and fragmentation of pre-existing rocks, and it typically includes particles like sand, silt, and clay. These grains are transported by wind, water, or ice and eventually deposited in various environments, forming sedimentary rocks over time through lithification.
They are both fertile, almost oasis like places. the Nile River Delta is a fertile and luscious place. The Nile River Valley is about the same, except a delta isn't the same thing as a valley.