What is river delta sediment?
A river delta is the area where a river splits into smaller streams called tributaries when it meets the ocean. Deltas are formed by the build-up of sediment over thousands of years. River delta sediment is made up of many tiny particles of rocks, which are classified by size.Composition of SedimentDelta river sediment is composed of pieces of sedimentary rock that have been broken down over time.GravelThe largest particles in sediment are gravel. Gravel pieces are formed when a larger rock is fractured into smaller pieces.SandSand is the second-largest size of sediment particles. Sand is produced when a larger rock is broken down into its separate mineral components.ClaySmaller particles of sediment are referred to as clay. Clay is formed from silica, which is sand that has a high silicon dioxide content.SiltSilt is the smallest sediment particle. Silt is formed when sand is broken down into even smaller pieces.Fertile SedimentRiver delta sediment, especially silt, can be very fertile
