2010
DOI: 10.1590/s0103-90162010000300010
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Causes of morphological discontinuities in soils of Depressão Central, Rio Grande do Sul State, Brazil

Abstract: Morphological, particularly textural, discontinuities between horizons increase soil erodibility in Depressão Central, Rio Grande do Sul State (Brazil). Characterization of such discontinuities would help to understand landscape evolution and to model near-surface hydrology. The objective of this research was to explore the relationship between morphological discontinuity and deposition of transported materials during pedogenesis. Transported material was meant to be mineral particles found in the soil profile… Show more

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Cited by 5 publications
(9 citation statements)
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“…Parahyba et al (2009), studying Planosols, also in the state of Pernambuco, observed some indication of reworking of more superficial materials and concluded that the studied soils had an autochthonous origin. However, as pointed out by Michelon et al (2010), it is difficult to confirm the transport of material, because the processes of weathering and pedogenesis tend to level the differences that allow for the recognition of different materials.…”
Section: Morphological Attributesmentioning
confidence: 99%
See 1 more Smart Citation
“…Parahyba et al (2009), studying Planosols, also in the state of Pernambuco, observed some indication of reworking of more superficial materials and concluded that the studied soils had an autochthonous origin. However, as pointed out by Michelon et al (2010), it is difficult to confirm the transport of material, because the processes of weathering and pedogenesis tend to level the differences that allow for the recognition of different materials.…”
Section: Morphological Attributesmentioning
confidence: 99%
“…Conversely, profiles 3 and 4, which had UV of 0.62 and 2.26, and FS/TS ratios with amplitudes of 0.04 and 0.32, respectively, show the possibility of having lithological discontinuity, especially in profile 4. However, more studies are necessary to confirm the presence of materials of allochthonous origin, because, according to Michelon et al (2010), the transport of material similar to that from the basement rock can occur and the processes of weathering and pedogenesis can level the differences that allow for the recognition of different materials.…”
Section: Pro Le 2 Pro Le 1 Pro Le 4 Pro Lementioning
confidence: 99%
“…Os dados dos três perfis estudados sugerem que o aporte externo de argilominerais é determinante na formação de solos mais desenvolvidos e com horizontes B, já se destacando pelo acúmulo de argila, corroborando com as ideias de Klamt & Schneider (1995) e de Michelon et al (2010). Contudo, esses solos ainda são considerados muito frágeis, visto que os horizontes superficiais apresentam textura areia a areia franca, muito pobres em termos de fertilidade e muito suscetíveis aos processos erosivos, tanto pluviais quanto eólicos (Paula & Robaina, 2003).…”
Section: Discussionunclassified
“…O trabalho de Klamt & Schneider (1995) sugeriu que os Argissolos sobre arenitos são formados por meio da adição externa de material argiloso de origem basáltica. Michelon et al (2010), analisando a pedogênese alóctone em perfis de solos derivados de sedimentos no RS, não encontraram indícios desse processo em perfis com mudança textural abrupta.…”
Section: Summary: Origin Of Sandstones From the Guará Formation And Tunclassified
“…Esses solos apresentam horizonte superficial de textura média a arenosa, com espessura variável. Também possuem horizonte subsuperficial iluvial do tipo B textural, com ou sem mudança textural abrupta (Pedron et al, 2004;Streck et al, 2008;Michelon et al, 2010).…”
Section: Introductionunclassified