Contribution à la connaissance de la pédogenèse quaternaire dans le S-W du Bassin parisien

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Abstract
Summary. — In the surroundings of Rambouillet, a town located 35 miles south of Paris ; the author describes some soils typical of pedogenesises that took place during the Pleistocene Epoch. He considers that the present and post-glacial pedogenesis gives sol brun lessivé and sol lessivé on a parent material such as loess. During the late Pleistocene, on high permeable parent material developped sol lessivé rouge and on umper- meable substratas, we find sol lessivé with strong gleying. The soils of upper Pleistocene are always rubefied, their base saturation is often very low and we note a beginning of evolution of various clay mineral towards kaolinite.

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