Genesis and stability of textural pedofeatures along a soil transect in the siliceous Iberian Chain (NE Spain)

Badía-Villas, David (Universidad de Zaragoza) ; Poch, Rosa M. ; Longares, Luis A. (Universidad de Zaragoza) ; Yuste, Alfonso (Universidad de Zaragoza) ; Bauluz, Blanca (Universidad de Zaragoza)

Resumen: Textural features are widespread in many soils, provide pedogenetic evidence, and are fundamental in soil classification systems. The presence of these features and their conservation over time require certain processes and soil forming factors. This study investigates the genesis of textural pedofeatures, especially clay coatings, and the stressful conditions that can eventually lead to their disappearance. To achieve this goal, four profiles with clay-enriched horizons have been studied (macro- and micromorphology, physical, chemical and mineralogical properties and classification) along a transect in the siliceous Iberian Chain (NE-Spain). The profiles, which have unmistakable illuvial accumulations in various horizons (Bhs, Bt, Btk), are classified (ST/WRB) as: a Spodosol/Podzol in the headslope, two Alfisol/Luvisols in the backslope and an Alfisol/Calcisol in the footslope. For the latter soil, the apparently strong difference in their classification to the first hierarchical level is due to the weight that the WRB places on the presence of an argic recarbonated horizon on a calcic horizon. Clay illuviation was identified in all the soils, with coatings and infillings of microlaminated clay. These clayey pedofeatures are mostly mechanically fragmented or deformed, which is micromorphologically evidenced by an undulating, wavy extinction that does not run completely parallel to the surfaces they cover. Different destructive processes are identified along the soil transect; so, cryoturbation is the dominant process in the Podzol located at the highest elevation (Moncayo Massif). Instead, the clay coatings in the Btk horizon of the footslope (Calcisol) are covered and deformed by the growth of secondary calcite. The textural pedofeatures in this soil, which is very clayey, can also undergo argilloturbation processes, like in the backslope soils (Luvisols). In conclusion, several ongoing stress processes, that sometimes require different environmental conditions (polygenetic), affect most textural pedofeatures and lead to their progressive alteration and disappearance. © 2021 The Authors

Idioma: Inglés

DOI: 10.1016/j.catena.2021.105965

Año: 2022

Publicado en: Catena 211 (2022), 105965 [13 pp.]
ISSN: 0341-8162

Factor impacto JCR: 6.2 (2022)

Categ. JCR: GEOSCIENCES, MULTIDISCIPLINARY rank: 17 / 202 = 0.084 (2022) - Q1 - T1
Categ. JCR: SOIL SCIENCE rank: 7 / 37 = 0.189 (2022) - Q1 - T1
Categ. JCR: WATER RESOURCES rank: 12 / 103 = 0.117 (2022) - Q1 - T1

Factor impacto CITESCORE: 9.8 - Earth and Planetary Sciences (Q1)

Factor impacto SCIMAGO: 1.472 - Earth-Surface Processes (Q1)

Financiación: nfo:eu-repo/grantAgreement/ES/UZ/UZ2020-TEC-01

Tipo y forma: Article (Published version)

Área (Departamento): Área Geografía Física (Dpto. Geograf. Ordenac.Territ.)
Área (Departamento): Área Edafología y Quím.Agríco. (Dpto. CC.Agrar.y Medio Natural)
Área (Departamento): Área Cristalografía Mineralog. (Dpto. Ciencias de la Tierra)