What is a wind-formed deposit made of fine particles of clay and silt called?

A wind-formed deposit made of fine particles of clay and silt is known as loess. This term specifically refers to a type of sediment that is primarily characterized by its light, fine texture, and is composed of silt-sized particles that have been transported by wind over long distances. Loess deposits are typically found in areas that have experienced significant glacial activity or are near deserts, where the fine particles can be easily lifted and carried by strong winds.

This material is important for agriculture because it tends to have good nutrient content and can retain moisture well, making it suitable for farming. The characteristics of loess also contribute to the formation of certain landscape features, such as bluffs and hillsides, which can impact local ecosystems and land use patterns.