The term 'Riverbank Deposit' is a geological term that refers to the accumulation of sediment, such as SILT, along the banks of a river. SILT is a type of soil particle that is finer than sand but coarser than clay. It is composed of rock and mineral particles that have been eroded by water or wind. Riverbank deposits are important for providing stability to the banks of rivers, as well as providing nutrients to the surrounding environment.