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dc.contributor.authorEtchebehere, Mario Lincoln
dc.contributor.authorSaad, Antonio Roberto [UNESP]
dc.contributor.authorFulfaro, Vicente José [UNESP]
dc.contributor.authorPerinotto, José Alexandre de Jesus [UNESP]
dc.date.accessioned2014-05-27T11:21:10Z
dc.date.available2014-05-27T11:21:10Z
dc.date.issued2004-10-01
dc.identifierhttp://dx.doi.org/10.5327/S1519-874X2004000200004
dc.identifier.citationGeologia USP - Serie Cientifica, v. 4, n. 2, p. 43-56, 2004.
dc.identifier.issn1519-874X
dc.identifier.urihttp://hdl.handle.net/11449/67894
dc.description.abstractThis paper presents the identification of tectonic deformation through the application of the stream-gradient index (slope x length) method in the Rio do Peixe hydrographic basin, located in western State of Sã o Paulo. The main principle used is that river valleys are the best tools for this type of analysis because of their fast adjustment to even the most gentle crustal deformations. This type of analysis for structural studies is extremely useful in the western region of the State of São Paulo, where deep chemical weathering results in a thick regolith and scarce outcrops. The stream length index is the ratio of the altimetric amplitude of each drainage and the natural logarithm of its length. The value obtained is plotted on maps at the median point of each drainage, allowing the drawings of lines with the same values (isodefs). Three anomalies (A, B and C) were identified along the Rio do Peixe valley representing uplift sectors indicated by the formation and distribution of Upper Quaternary deposits in terraces and modern fluvial plains and alluvial fans. In correlation with known tectonic data for this region it is possible to attribute the A and B anomalies to the Ribeirão Preto and Presidente Prudente crustal sutures, respectively. The smaller C anomaly needs further field investigation, but it could be associated with the Três Lagoas crustal suture. It must be emphasised that these sutures are inherited from the Precambrian Basement which had a strong influence on the Phanerozoic evolution in the whole sedimentary and volcanic stratigraphic pile of the Paraná Basin and on the dominant structural lineaments directions developed therein .The A, Band C anomalies are suggestive of renewed uplift as a result of neotectonic action in modern times.en
dc.format.extent43-56
dc.language.isopor
dc.relation.ispartofGeologia USP: Serie Cientifica
dc.sourceScopus
dc.subjectFluvial morphometry
dc.subjectHydraulic gradient
dc.subjectNeotectonics
dc.subjectfluvial geomorphology
dc.subjectlandscape evolution
dc.subjectneotectonics
dc.subjectstream
dc.subjectuplift
dc.subjectBrazil
dc.subjectSao Paulo [Brazil]
dc.subjectSouth America
dc.subjectWestern Hemisphere
dc.subjectWorld
dc.titleAplicação do Índice Relaçáo Declividade-Extensão - RDE Na Bacia do Rio do Peixe (SP) para Detecção de Deformações Neotectô nicaspt
dc.title.alternativeApplication of the stream index method in the Rio do Peixe Basin (SP) in detecting neotectonic deformationen
dc.typeArtigo
dcterms.licensehttp://www.revistas.usp.br/guspsc/about/editorialPolicies#openAccessPolicy
dc.contributor.institutionUnG
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.description.affiliationCentro de Pos-Graduacao Pesquisa e Extensão UnG, Praça Tereza Cristina 1, CEP 07023-070, Guarulhos
dc.description.affiliationDepartamento de Geologia Aplicada Inst. Geociencias/Ciencias Exatas UNESP, Rio Claro
dc.description.affiliationUnespDepartamento de Geologia Aplicada Inst. Geociencias/Ciencias Exatas UNESP, Rio Claro
dc.identifier.doi10.5327/S1519-874X2004000200004
dc.identifier.scieloS1519-874X2004000200004
dc.rights.accessRightsAcesso aberto
dc.identifier.scopus2-s2.0-10844244926
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Geociências e Ciências Exatas, Rio Claropt
dc.identifier.file2-s2.0-10844244926.pdf
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