Definition
Sandy soils featuring very weak or no soil development.

Distribution
These soils occur on deep aeolian, marine, lacustrine and alluvial sands. The total estimated extent is 900 million hectares, mainly in the Kalahari and Sahel regions of Africa, and in Western Australia and South America. They are frequently associated with Leptosols, Regosols, Calcisols, Solonchaks and Podzols.