Abstract
IN many parts of the world, especially in those that were not glaciated during the Pleistocene epoch, red hematitic soils that formed in a previous climate (different from the present one) still exist. In regions where the present climate is cooler and more humid than the previous one, the red colour seems to be disappearing and being replaced by more yellowish-brown colours that indicate the mineralogical transformation of hematite (α-Fe2O3) to goethite (α-FeOOH).
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References
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SCHWERTMANN, U. Transformation of Hematite to Goethite in Soils. Nature 232, 624–625 (1971). https://doi.org/10.1038/232624a0
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DOI: https://doi.org/10.1038/232624a0
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