River deposits are materials that rivers carry and leave behind as they flow. These deposits can include sand, silt, clay, and gravel, which are transported from upstream areas. When the river slows down, such as when it enters a lake or the ocean, it loses energy and drops these materials, forming features like sandbars and deltas. Over time, river deposits can create fertile land, making areas near rivers ideal for agriculture. They also play a crucial role in shaping the landscape, contributing to the formation of riverbanks and floodplains. Understanding river deposits helps scientists study erosion and sedimentation processes.