Contribució al coneixement dels sòls fersialítics del sud de Lió (França) Authors Jaume Bech i Borràs Abstract The macromorphological and physicochemical characteristics of fersialitic soils from the Corbas plain and from the Saint Symphorien d'Ozon, Villete de Vienne and Pont Eveque depressions (Lyon-Vienne area), are explained, indicating their relict nature. Profiles, one from the «fersialitic with calcic reserve. group located on a fluvioglacial terrace probably dating from the fini-Wurmian period, and two from the «fersialitic» without calcic reserve,, group on moraines which show signs of cryoturbation, and of an older pedogenesis, Riss-Wurm or perhaps Mindel-Riss, are presented. The first one shows a pH of between 7 and 7,2, a saturation level greater than 65 % and a clay illuviation index of more than 1/1,4. But from the iron illuviation index and the lower level of saturation -V- in the horizon B3 (50,3), it would perhaps be necessary to consider this soil as being a stage between the fersialitics with calcic reserve and those without it. From its colour it should perhaps be placed between the brown and the red fersialitics. The second profile corresponds to a reddish brown acid fersialitic soil (pH less than 5), only slighthly illuviated and devoid of calcic reserve. Judging by the pH it belongs to the IX/22 group (CPCS, 1967) but from the clay illuviation index which is greater than 1/1,4 it resembles the IX/21 group. Thus, it seems like a IX/22-IX/21 slightly illuviated fersialitic intergrade. The third profile described, a red acid fersialitic soil without calcic reserve, would also be taxonomically better classified as being between IX/21 and IX/22, due partly to the pH value and the dose of iron liberation in the horizon B, and partly to the exceedingly high values of the saturation complex as well as the clay illuviation index which is greater than 1/1,4. Downloads Download data is not yet available. Downloads Text complet (Català) Published 2005-05-12 Issue Vol. 48 : 1982 (Secció de Geologia, 3) Section Articles License The intellectual property of articles belongs to the respective authors.On submitting articles for publication to the journal Butlletí de la Institució Catalana d'Història Natural authors accept the following terms:Authors assign to Institució de la Societat Catalana d’Història Natural (a subsidiary of Institut d’Estudis Catalans) the rights of reproduction, communication to the public and distribution of the articles submitted for publication to Butlletí de la Institució Catalana d'Història Natural.Authors answer to Institució de la Societat Catalana d’Història Natural for the authorship and originality of submitted articles.Authors are responsible for obtaining permission for the reproduction of all graphic material included in articles.Institució de la Societat Catalana d’Història Natural declines all liability for the possible infringement of intellectual property rights by authors.The contents published in the journal, unless otherwise stated in the text or in the graphic material, are subject to a Creative Commons Attribution-NonCommercial-NoDerivs (by-nc-nd) 3.0 Spain licence, the complete text of which may be found at https://creativecommons.org/licenses/by-nc-nd/3.0/es/deed.en. Consequently, the general public is authorised to reproduce, distribute and communicate the work, provided that its authorship and the body publishing it are acknowledged, and that no commercial use and no derivative works are made of it.The journal Butlletí de la Institució Catalana d'Història Natural is not responsible for the ideas and opinions expressed by the authors of the published articles.