Novas Informações Sobre Geocronologia Em Níveis De Baixo Terraço Fluvial Do Rio Mogi Guaçu, Sp, Brasil

Storani, Daniel Luís; Filho, Archimedes Pérez

doi:10.20502/rbg.v16i2.656

Cited by 11 publications

(6 citation statements)

References 3 publications

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“…), considering the younger age of the sediments, about 750 (±150; point 1) yr BP; however, this hypothesis needs additional data to be validated. These data and interpretations are in agreement with recent research regarding the fluvial terraces in other sectors of the Piracicaba basin (Dias & Perez Filho, 2015;Souza, 2016) and other principal rivers of the Paulista Peripheral Depression (Storani & Perez Filho, 2015).…”

Section: Main Processes and Associated Landforms Of The Mapped Areasupporting

confidence: 92%

Geomorphology of the São Pedro ridge and Lower Piracicaba River region, southeastern Brazil

Pinheiro

Neto

2016

Journal of Maps

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This work presents a new geomorphological map (1:50,000) of the São Pedro region in southeastern Brazil. It incorporates new information about landform development and updates the classical legend of the Recherche Coopérative Sur Programme 77 that supported the previous map drawn in 1978. According to the new map and associated papers, tectonic structures have controlled the orientation of the streams that have dissected the regional landforms, especially during wetter periods. Under dry conditions, the planing process caused faster escarpment retreat of the São Pedro ridge and gave rise to a glacis and its Pleistocene colluvial sandy cover. The escarpment, glacis, and other regions were dissected during subsequent wet periods, forming the upper Quaternary main fluvial terraced levels of the Piracicaba and Tietê rivers. Finally, this geomorphological arrangement was disturbed by the reactivation of old structures in the current tectonic environment.

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Section: Main Processes and Associated Landforms Of The Mapped Areasupporting

confidence: 92%

Geomorphology of the São Pedro ridge and Lower Piracicaba River region, southeastern Brazil

Pinheiro

Neto

2016

Journal of Maps

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“…However, in South America, researches have shown complex climate dynamics with the simultaneous establishment of the climate dipoles conducting to the un-correlated environmental conditions in northeastern (precipitation rates decreases) and southeastern (precipitation rates increases) Brazil and drier periods in the Andean region (e.g., Campos et al, 2019; Haug et al, 2001; Kennett et al, 2012; Novello et al, 2018; Oliveira et al, 2014; Vuille et al, 2012). In general, the LIA directly or indirectly supported natural (fluvial, coastal, and ocean systems) and social transformations during the recent period in different parts of the world (e.g., Carozza et al, 2012; Grove, 2001; Peres et al, 2018; Pessenda et al, 2012; Souto et al, 2011; Souza and Perez Filho, 2019; Storani and Perez Filho, 2015).…”

Section: Introductionmentioning

confidence: 99%

Recent geomorphological changes in the Paraiba do Sul delta, South America East Coast

al.

Lämmle

Filho

et al. 2022

Progress in Physical Geography: Earth and Environment

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The Paraiba do Sul River delta, a South America east coast system, presents deposits recording complex sedimentary dynamics in the deltaic plain during the Little Ice Age (LIA). The use of optically stimulated luminescence (OSL) dating, sediment grain-size characterization, and morpho-chronological analysis showed that from ∼450 to 100years (LIA period), both in lower to upper deltaic plain, remodeling occurred in conjunction with the coastline regression. The freshwater and sediment influx increases due to the moisture enhancements during the LIA resulted in the intensification of the fluvial dynamic, channel downcutting on the marine terrace, and sedimentary environments remodeling. Further, the base-level changes occasioned by the coastline regression strengthen the geomorphological dynamics associated with the recent changes in the Paraiba do Sul delta. Currently, the coastal erosion problem found in the area seems to reflect the coupling between climate dynamic (rainfall rates decrease) and multiple-scale anthropic intervention. Results show a high sensitivity of humid tropical deltaic systems to short-time climate events, further contribute to broadening discussions on the complexity of this delta system’s morphosedimentary evolution during the Late Holocene.

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“…The infl uence of the transition from the Little Ice age to the current wet climate on the production of Holocene terraces in Brazil was researched by Storani (2015), Storani and Perez Filho (2015) and Souza and Perez Filho (2015). The authors identifi ed the production of low fl uvial terraces in rivers located in the Western Plateau of São Paulo (Pardo and Turvo: 740 ± 100 / 560 ± 80 / 540 ± 75 years B.P.)…”

Section: Discussionmentioning

confidence: 99%

Geochronology and Hydrodynamic Energy Conditions in Surface Coverings of Low Holocene Fluvial, Fluvial-Marine, and Marine Terraces: Climatic Pulsations to the South of the Aranguaguá River Basin (Sc)

Rubira

Filho

2018

Rev. Bras. Geomorfol.

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Abstract:This research aims to perform the geochronology of surface coverings in low Holocene marine, fl uvial-marine, and fl uvial terraces, associating the genesis of paleo-forms with the occurrence of Holocene climatic pulsations, the consequential switches between hot-dry/hot-wet continental phases, and the retrograde and prograde movements of the oceanic coast due to eustatic sea-level fl uctuations. At the same time, it aims to verify and correlate specifi c hydrodynamic energy conditions during past depositional events, responsible for preparing the levels of low fl uvial, fl uvial-marine, and marine terraces to the south of the Araranguá river (SC). The methodology was based in absolute dating through Optically Stimulated Luminescence (OSL) in quartz grains of the surface coverings of these low terraces and in granulometric tests with later data plotting and verifi cation of sediment types, textural classes, and the respective paleo-hydrodynamic energy conditions, classifi ed based on the textural diagram of Flemming (2000). Results of geochronological reconstruction corresponded to climatic events of switches between hot-dry/hot-wet environments and to global cooling periods identifi ed by Bond et al. (1997Bond et al. ( , 2001 and Wanner et al. (2011). Three Holocene climatic pulsations were identifi ed, which were determinant for the superfi cial organization of the landscape in the lower course of the Araranguá river and the oceanic plain of the Araranguá River Basin: Climatic pulsation I (6.000 ± 820 to 5.000 ± 620 Paulo, v.19, n.3 (Jul-Set) p.635-663, 2018 Years B.P.), climatic pulsation II (2.700 ± 420 to 2.250 ± 300 Years B.P.) and climatic pulsation III (420 ± 65 to 215 ± 25 Years B.P.). The application of results in the textural diagram of Flemming (2000) allowed the diff erentiation of sedimentation environments, which were correlated with varied hydrodynamic energy regimes. Surface coverings of the low fl uvial terrace (GS-I) and the alluvial materials of the low fl uvial-marine terrace (GS-II) presented the highest mud content among all samples, which was correlated with moderate and moderate-to-high hydrodynamic energy transport fl ows. On the other hand, surface coverings of marine terraces (GS-III and GS-IV) and the marine sandy materials underlying alluvial deposits of the fl uvial-marine terrace showed low levels of mud and high levels of sand, representing high-and very high-intensity hydrodynamic energy fl ows. Informações sobre o Artigo Resumo:Esta pesquisa objetiva realizar geocronologia das coberturas superfi ciais em níveis de baixos terraços fl uviais, fl uviomarinhos e marinhos holocênicos, associando a gênese das paleoformas com a ocorrência de pulsações climáticas holocênicas, consequentes alternâncias de fases continentais quentes-secas/quentes-úmidas e movimentos de progradação e retrogradação da costa oceânica em função de fl utuações eustáticas do nível relativo do mar. Simultaneamente objetiva verifi car e correlacionar às condições energéticas hidrodinâmicas durante e...

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Novas Informações Sobre Geocronologia Em Níveis De Baixo Terraço Fluvial Do Rio Mogi Guaçu, Sp, Brasil

Cited by 11 publications

References 3 publications

Geomorphology of the São Pedro ridge and Lower Piracicaba River region, southeastern Brazil

Geomorphology of the São Pedro ridge and Lower Piracicaba River region, southeastern Brazil

Recent geomorphological changes in the Paraiba do Sul delta, South America East Coast

Geochronology and Hydrodynamic Energy Conditions in Surface Coverings of Low Holocene Fluvial, Fluvial-Marine, and Marine Terraces: Climatic Pulsations to the South of the Aranguaguá River Basin (Sc)

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