"Wikipedia:Durisol"^^ . . "ENVO:00002238"^^ . "durisol"^^ . "ENVO"^^ . . "Durisols are associated mainly with old surfaces in arid and semi-arid environments and accommodate very shallow to moderately deep, moderately well- to well-drained soils that contain cemented secondary silica (SiO2) within 100 cm of the soil surface."^^ .