Molina, E.García Talegón, J.Vicente, M. A.2010-01-222010-01-221994Cadernos do Laboratorio Xeolóxico de Laxe, 1994, 19: 261-271 ISSN: 0213-44970213-4497http://hdl.handle.net/2183/6172The Hercynian basement of the Iberian Peninsula has undergone different stages of supergenic weathering which has given rise to a superposition of several «weathering mantles». Remnants ofan old weathering mantle, Mesozoic in age, and related to a planation surface older than the Alpine tectonic phases, have been found. Nowadays the fragments of this old surface appear unleveled and/or fossilized by younger sediments. likewise, related to the «Raña» sediments ofUpper Neogene-lower Pleistocene age, appears a weathering mantle, probably active today, which is rich in kaolinite and with strong hydromorphic features.spaPaleowatheringHercynian basementSpainjournal articleopen access