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.
Buff (colour)
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Buff is a light brownish yellow, ochreous colour, typical of buff leather. Buff is a mixture of yellow ochre and white: two parts of white lead and one part of yellow ochre produces a good buff, or white lead may be tinted with French ochre alone.
Standard buff after A. S. Jennings.
Buff after R. Ridgway.
Buff sand