What is wind eroding only fine grained sediment leaving behind coarse sediments?

Wind erosion of fine-grained sediment, known as "deflation," occurs when strong winds lift and transport smaller particles like silt and clay, leaving behind coarser sediments such as sand and gravel. This process often results in the formation of features like blowouts or desert pavements, where the surface becomes dominated by larger, less mobile particles. As fine materials are removed, the landscape can change dramatically, affecting soil composition and vegetation. Ultimately, this selective erosion can lead to increased surface roughness and altered ecological dynamics in the affected areas.