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Groundwater Laterite, Plinthaquox (USDA)
Used in WRB
WRB code PT
Key process Accumulation of Fe under hydromorphic conditions
Parent material basic rock, Fe
Climate wet tropics

Plinthosols are iron-rich soils characterized by the presence of plinthite, petroplinthite or pisoliths.[1]


Regional Distribution of Plinthosols

Softer plinthosols are common in the wet tropics, including in the eastern Amazon basin, the central Congo basin and parts of Southeast Asia. Dryer areas, including the Sudano-Sahelian zone, Southern African savannah, the Indian subcontinent, and parts of Southeast Asia and northern Australia feature mostly harder pisoliths and petroplinthite.[1]


  1. ^ a b IUSS Working Group WRB (2007). World Reference Base for Soil Resources 2006, first update 2007 (PDF) (2 ed.). Rome: FAO. pp. 87–88. Retrieved 21 August 2013. 

See also[edit]