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Red-earth formation and lateritization (their differentiation by micromorphological characteristics).



Red-earth formation and lateritization (their differentiation by micromorphological characteristics).



VIe Congr. int. Sci. Sol Rapp, E: 247-249



Very fine crystals of Fe hydroxide (mainly haematite) occur in red earths. Thin cross-sections of red earths are translucent and homogeneously bright red or reddish. Lateritic sections have many opaque inclusions as well as translucent parts. Some of the Fe hydroxides are very mobile during the early stages of lateritization. If SiO2 is not leached away it is converted into chalcedony and secondary quartz, but such transformations never occur in red-earth formation.

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