Sandy deposit is a geological term used to describe a type of sedimentary deposit composed of sand and loess, which is a fine-grained, silty material. Loess is a wind-blown sediment that is usually composed of SILT-sized particles. Sandy deposits are often found in areas with high wind activity, such as deserts and coastal regions. They are also common in areas with large rivers, as the river can carry large amounts of sand and SILT downstream. Sandy deposits are important for soil fertility and water retention, and they can also be used to create artificial beaches.