Laterite mottled zone

Figure 3.13 Schematic illustration of the formation and evolution of successive laterite facies. (A) Mottled clay layer with ferruginised nodules and bleached zones. (B) Secondary fillings of kaolinite in bleaching zones. (C) Ferruginisation of kaolinite and the formation of pseudo-conglomeratic iron crust. (D) Evolution of haematite nodules into pisolites with the formation of pisolitic crust (after Nahon, 1986 Thomas, 1994).

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