Durisol

"Durisol" is also a trade name for a type of cement-bonded wood fiber.
In the FAO World Reference Base for Soil Resources, a durisol is a very shallow to moderately deep, free-draining soil of arid and semi-arid environments, that contains cemented secondary silica (SiO2) in the upper metre of soil. Durisols are internationally known as "hardpan soils" (Australia) or "dorbank" (South Africa) or they represent the "duripan phase" of other soils, e.g. of Calcisols (FAO).