Loess
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A loess is a clastic, predominantly silt-sized sediment that is formed by the accumulation of wind-blown dust. Ten percent of Earth's land area is covered by loesses or similar deposits.
Loess in Vicksburg, Mississippi, United States
Loess near Hunyuan, Datong, Shanxi, China
Loess from the Rhine lowlands near Mannheim with calcareous concretions
Medicinal clay produced by Luvos. The clay is composed of loess with a fineness grade of 1.
Silt
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Silt is granular material of a size between sand and clay and composed mostly of broken grains of quartz. Silt may occur as a soil or as sediment mixed in suspension with water. Silt usually has a floury feel when dry, and lacks plasticity when wet. Silt can also be felt by the tongue as granular when placed on the front teeth.
Windrow of windblown silt, Northwest Territories, Canada
A stream carrying silt from fields in Brastad, Sweden
A silted lake located in Eichhorst, Germany