Genesis of subtropical soils with stony horizons in NE Argentina: Autochthony and polygenesis
Deep red soils, combining characteristics of highly weathered materials together with a significant degree of clay illuviation and with stony horizons close to the saprolite, are found in the Province of Misiones, northeastern Argentina. Two basic types of stony horizons have been found, which with...
| Autores principales: | , , , |
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
| Publicado: |
Elsevier
2019
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/5502 https://www.sciencedirect.com/science/article/pii/S1040618208002103 https://doi.org/10.1016/j.quaint.2008.07.001 |
| _version_ | 1855035509500280832 |
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| author | Morras, Hector Moretti, Lucas Martin Piccolo, Gabriel Agustin Zech, Wolfgang H. |
| author_browse | Moretti, Lucas Martin Morras, Hector Piccolo, Gabriel Agustin Zech, Wolfgang H. |
| author_facet | Morras, Hector Moretti, Lucas Martin Piccolo, Gabriel Agustin Zech, Wolfgang H. |
| author_sort | Morras, Hector |
| collection | INTA Digital |
| description | Deep red soils, combining characteristics of highly weathered materials together with a significant degree of clay illuviation and with stony horizons close to the saprolite, are found in the Province of Misiones, northeastern Argentina. Two basic types of stony horizons have been found, which with the fine-grained material above are together considered autochthonous. The first one is a “ferruginous nodular horizon”, composed mainly of in situ goethitic nodules of gravel size resulting from weathering and glaebulization processes of basalt. The second are “siliceous horizons” which are also in situ, derived from pre-existing quartz veins within the basalt. In contrast, different analytical evidences, particularly the vertical and geographical variations in the SOM-stable carbon isotope ratios and the mineralogical composition of fine and coarse fractions, suggest that these red subtropical soils are polygenetic, being the result of a two-fold process linked to paleoecological fluctuations. In the framework of these results, different interpretations about the origin of these soils and their parent materials, and particularly the “tropical loess” theory, are discussed. |
| format | info:ar-repo/semantics/artículo |
| id | INTA5502 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA55022024-09-16T12:09:53Z Genesis of subtropical soils with stony horizons in NE Argentina: Autochthony and polygenesis Morras, Hector Moretti, Lucas Martin Piccolo, Gabriel Agustin Zech, Wolfgang H. Génesis del Suelo Tipos de Suelos Suelo Subtropical Suelo Pedregoso Horizontes del Suelo Soil Genesis Soil Types Subtropical Soils Stony Soils Soil Horizons Región Noreste, Argentina Deep red soils, combining characteristics of highly weathered materials together with a significant degree of clay illuviation and with stony horizons close to the saprolite, are found in the Province of Misiones, northeastern Argentina. Two basic types of stony horizons have been found, which with the fine-grained material above are together considered autochthonous. The first one is a “ferruginous nodular horizon”, composed mainly of in situ goethitic nodules of gravel size resulting from weathering and glaebulization processes of basalt. The second are “siliceous horizons” which are also in situ, derived from pre-existing quartz veins within the basalt. In contrast, different analytical evidences, particularly the vertical and geographical variations in the SOM-stable carbon isotope ratios and the mineralogical composition of fine and coarse fractions, suggest that these red subtropical soils are polygenetic, being the result of a two-fold process linked to paleoecological fluctuations. In the framework of these results, different interpretations about the origin of these soils and their parent materials, and particularly the “tropical loess” theory, are discussed. Instituto de Suelos Fil: Morras, Hector. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Suelos; Argentina Fil: Moretti, Lucas Martin. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Suelos; Argentina Fil: Piccolo, Gabriel Agustin. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cerro Azul; Argentina Fil: Zech, Wolfgang H. University of Bayreuth. Institute of Soil Science and Soil Geography; Alemania 2019-07-15T15:13:58Z 2019-07-15T15:13:58Z 2009-03 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/5502 https://www.sciencedirect.com/science/article/pii/S1040618208002103 1040-6182 https://doi.org/10.1016/j.quaint.2008.07.001 eng info:eu-repo/semantics/restrictedAccess application/pdf Elsevier Quaternary International 196 (1–2) : 137-159 (March 2009) |
| spellingShingle | Génesis del Suelo Tipos de Suelos Suelo Subtropical Suelo Pedregoso Horizontes del Suelo Soil Genesis Soil Types Subtropical Soils Stony Soils Soil Horizons Región Noreste, Argentina Morras, Hector Moretti, Lucas Martin Piccolo, Gabriel Agustin Zech, Wolfgang H. Genesis of subtropical soils with stony horizons in NE Argentina: Autochthony and polygenesis |
| title | Genesis of subtropical soils with stony horizons in NE Argentina: Autochthony and polygenesis |
| title_full | Genesis of subtropical soils with stony horizons in NE Argentina: Autochthony and polygenesis |
| title_fullStr | Genesis of subtropical soils with stony horizons in NE Argentina: Autochthony and polygenesis |
| title_full_unstemmed | Genesis of subtropical soils with stony horizons in NE Argentina: Autochthony and polygenesis |
| title_short | Genesis of subtropical soils with stony horizons in NE Argentina: Autochthony and polygenesis |
| title_sort | genesis of subtropical soils with stony horizons in ne argentina autochthony and polygenesis |
| topic | Génesis del Suelo Tipos de Suelos Suelo Subtropical Suelo Pedregoso Horizontes del Suelo Soil Genesis Soil Types Subtropical Soils Stony Soils Soil Horizons Región Noreste, Argentina |
| url | http://hdl.handle.net/20.500.12123/5502 https://www.sciencedirect.com/science/article/pii/S1040618208002103 https://doi.org/10.1016/j.quaint.2008.07.001 |
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