The Holocene Coastal Barriers of Rio Grande do Sul

Dillenburg, Sérgio Rebello; Barboza, Eduardo Guimarães; Tomazelli, Luiz J.; Ayup-Zouain, Ricardo Norberto; Hesp, Patrick A.; Clerot, Luiz Carlos Pinheiro

doi:10.1007/978-3-540-44771-9_3

Cited by 63 publications

(47 citation statements)

References 16 publications

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“…As System IV has the most studied stratigraphic record of the coastal plain, and sea-level history during Holocene is quite well known we did not performed new measurements in this work. Barrier IV was studied in detail by Dillenburg et al (2000Dillenburg et al ( , 2009, Dillenburg and Barboza (2014) and Hesp et al (2005Hesp et al ( , 2007, which distinguished three main morphological barrier types: relict dunefields, active dunefields or a complex foredune ridges, and dunefields combination. The morphological types of Barrier IV are related to the stratigraphic stacking found in GPR data (Rosa 2012;Barboza & Rosa 2014).…”

Section: Resultsmentioning

confidence: 99%

“…Also, tectonics ), climate, coastal dynamic processes, and sedimentary budget (Toldo Jr. et al 1999, 2004Dillenburg et al 2000Dillenburg et al , 2009Gruber et al 2003Gruber et al , 2006Martinho et al 2008Martinho et al , 2009Martinho et al , 2010Lopes et al 2013; have controlled the creation and filling of accommodation. In this paper, we reviewed the age and sequence stratigraphic evolution of Systems II through IV.…”

Section: High-frequency Sedimentary Record: Barrier-lagoon Systemsmentioning

confidence: 99%

“…This plain, with 770 km of extension and 15 to 100 km wide, is formed by alluvial fan systems and by the lateral juxtaposition of four barrier-lagoon depositional systems, firstly defined for Rio Grande do Sul by Villwock et al (1986). Such systems have evolved during the Upper Quaternary, due to the combination of allochthonous and autochthonous processes, such as the eustasy (Delaney 1965;Villwock & Tomazelli 1995;Tomazelli & Villwock 1996), tectonics ), climate (Martinho et al 2008(Martinho et al , 2010Lopes et al 2013), coastal dynamics, and sedimentary budget (Toldo Jr. et al 1999, 2004Dillenburg et al 2000Dillenburg et al , 2009Gruber et al 2003Gruber et al , 2006. Thus, the understanding of the geological development of the coastal plain can be improved through the application of sequence stratigraphy.…”

Section: Introductionmentioning

confidence: 99%

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High-Frequency Sequences in the Quaternary of Pelotas Basin (coastal plain): a record of degradational stacking as a function of longer-term base-level fall

Rosa

Barboza

Abreu³

et al. 2017

Braz. J. Geol.

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ABSTRACT:The aim of this work was to analyze the sedimentary record of the coastal plain of Pelotas Basin, placing it in the context of temporal and spatial scales, and proposing a stratigraphic hierarchical framework. The coastal plain, located in southern Brazil and in northern Uruguay, is mainly formed by four Quaternary barrier-lagoon systems. Three of these systems were studied through the integration of surface and subsurface data (geomorphological and topographical mapping, outcrops description, geoprocessing, dating and Ground Penetrating Radar -GPR -records) and interpreted as the preserved, onshore portion of depositional sequences mainly controlled by glacioeustatic cycles of about 100 kyr. The stacking pattern comprising these sequences is progradational with seaward downsteping (highest sea-levels measured: 9.5, 8 and 3 m, respectively), comprehending a degradational sequence set, or the regressive/ falling stage systems tract of a higher order depositional sequence identified in seismic sections, with about 0.5 Ma. The youngest sequence has diachronous systems tracts -while some sectors have already transitioned from the transgressive to the highstand/falling stage systems tract, others are still under a transgressive context. It indicates that, in this time and scale, the sea level is not the main control of coastal evolution, and autogenic factors are fundamental in the run of geological record. KEYWORDS:Barrier-Lagoon; Glacioeustasy; Diachronism of Systems Tracts; Ground Penetrating Radar; Rio Grande do Sul coastal evolution. RESUMO:

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Section: Resultsmentioning

confidence: 99%

Section: High-frequency Sedimentary Record: Barrier-lagoon Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High-Frequency Sequences in the Quaternary of Pelotas Basin (coastal plain): a record of degradational stacking as a function of longer-term base-level fall

Rosa

Barboza

Abreu³

et al. 2017

Braz. J. Geol.

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“…Esta condição favoreceu a superação da taxa de geração de espaço de acomodação pela taxa de aporte sedimentar e, portanto, a rápida progradação, durante o Holoceno tardio. O mesmo período de início do desenvolvimento da progradação costeira também é observado em outras planícies de cordões do hemisfério sul (Dominguez et al 1983, Woodroffe et al 1983, Roy et al 1994, Angulo et al 1996, Isla & Bujalesky 2000, Lessa et al 2000, Blivi et al 2002, Giannini et al 2003, Tomazelli & Villwock 2005, Bristow et al 2006, Fitzgerald et al 2007, Brooke et al 2008, Dias & Kjerfve 2009, Dillenburg et al 2009, Guedes 2009). …”

Section: Estágios Cronológicos Do Jiunclassified

“…As taxas de progradação calculadas para os últimos quatro estágios foram de 2,26, 0,28, 1,47 (Isla 1989), e tem sido objeto de estudos sedimentológicos e/ou estratigráficos em diferentes setores costeiros da Austrália (Roy et al 1994, Bristow et al 2006, Brooke et al 2008, Nova Zelândia (Woodroffe et al 1983), África austral (Blivi et al 2002) e Argentina (Isla & Bujalesky 2000). No Brasil, destacam-se, entre outras regiões estudadas, a foz do rio São Francisco, SE/BA (Dominguez et al 1983), a foz do rio Paraíba do Sul, RJ (Dias & Kjerfve 2009), a Ilha Comprida, SP (Giannini et al 2003, Guedes 2009), as planícies adjacentes à baía de Paranaguá, incluindo a Ilha do Mel, PR (Angulo et al 1996, Lessa et al 2000), a região de Tijucas e Navegantes, SC (Fitzgerald et al 2007), a enseada da Pinheira, SC ) e a planície litorânea do Rio Grande do Sul a norte de Tramandaí (Tomazelli & Villwock 2005, Dillenburg et al 2009). Nestas regiões, o registro de progradação mais ou menos continuada deve-se à manutenção de taxa de aporte sedimentar superior à de geração de espaço de acomodação por variação de NRM.…”

Section: Introductionunclassified

Sedimentologia, cronologia e dinâmica progradacional das planícies costeiras de Campos Verdes e Ji (Laguna, SC)

Tanaka¹

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SÃO PAULO 2010I "Aí está ele, o mar, a mais ininteligível das existências não humanas. E aqui está a mulher, de pé na praia, o mais ininteligível dos seres vivos. Como ser humano fez um dia uma pergunta sobre si mesmo, tornou-se o mais ininteligível dos seres vivos. Ela e o mar.Só poderia haver um encontro de seus mistérios se um se entregasse ao outro: a entrega de dois mundos incognoscíveis feita com a confiança com que se entregariam duas compreensões.... Mesmo que o esqueça daqui a uns minutos, nunca poderá perder tudo isso."As águas do mundo -Clarice Lispector II AGRADECIMENTOSAos meus pais Antonio e Maritza, por sempre valorizarem e respeitarem minhas escolhas; muito obrigada, pai e mãe, pelo apoio e compreensão! À minha querida irmã, que apesar de morar do outro lado do oceano, está sempre presente.Ao amigo e orientador Prof. Paulo C. F. Giannini, que me mostrou caminhos, me ensinou a engatinhar e depois a andar neles e através deles. Ao também amigo e co-orientador Prof.André O. Sawakuchi, que me deu empurrões necessários para o desenvolvimento deste trabalho. Ao Prof. Francisco W. da Cruz Jr., pelas sugestões e explicações sobre paleoclima.Aos novos amigos da geofísica, Ângelo, Ana Elisa, Baiano, Caio, Frederico e Karine, pelo bom humor e companheirismo. Aos irmãos Na, Rafa e Vi Gitti que fizeram parte da família 101C durante esses dois anos. Às amigas geólogas Talita (Xoca), Daina, Ana e Grace, o Rio de Janeiro continua lindo! À amiga física Pat Magalhães pelas dicas de Origin e conversas de bandejão. Ao Marcel por me ajudar com o sprint final nas impressões. E aos amigos "humanos" Dea Morganti, Felipe Moreira e Natália Gitti, eu se divirto com vocês.Obrigada ao meu time (BAFEFI), que me recebe de braços abertos toda quarta-feira para jogar basquete; essa descontração foi fundamental durante o mestrado.Aos alunos da oceanografia que cursaram a disciplina princípios da geologia sedimentar em 2009 e aos alunos da geologia que estão cursando a disciplina sedimentologia, por me ajudarem a enxergar a geologia sedimentar sob outra perspectiva e por cativar a minha vontade de aprender e compartilhar.Aos alunos e professores da disciplina simulação dos sistemas complexos. ..............................................................................................66 6.5.1. Estágios cronológicos de Campos Verdes ............................................................................... : trocas de sedimentos ........................................................................................ climática .........................................................................................84 7. CONCLUSÕES....................................................................................................................................97 REFERÊNCIAS BIBLIOGRÁFICAS .....................................................................................................104 ANEXO 1 -RESULTADO DA ANÁLISE GRANULOMÉTRICA...................................................... ...............................

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Review and direct evidence of transgressive aeolian sand sheet and dunefield initiation

Hesp

DaSilva

Silva

et al. 2022

Earth Surf Processes Landf

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The multiple hypotheses which exist to explain the initiation of transgressive aeolian sand sheets and dunefields, are reviewed and discussed. Direct evidence supporting many of these hypotheses is largely lacking. In South Australia, the Younghusband Peninsula coastal barrier extends ~180 km and predominantly comprises transgressive and parabolic dunefields. The 42 Mile Crossing area on the barrier is undergoing significant erosion at variable rates of 0.5 to 5.0 m/yr, and a new transgressive aeolian sand sheet has rapidly developed in ~1 year and is extending landwards at an average rate of 13 m/yr. This research provides unequivocal evidence that large‐scale shoreline and dunefield erosion does lead to the development of a new transgressive aeolian sand sheet (and eventual dunefield) phase thereby demonstrating an initiation mechanism that is likely linked to future sea level rise and climate change. We also show that the initiation process, and, in particular, the subsequent rate of sand sheet transgression occurs at an incredibly rapid rate (+100 m in 8 years). Plain Language Summary Coastal sand dunes border many of the world's coastlines and are highly adapted to local climate and conditions. How coastal dunes transition from predominantly vegetated and stable systems to wind‐blown sand sheets and dunefields transgressing prior terrain is a research area of pressing relevance due to forecasts of sea level rise and climate change. The factors or triggers that are considered to initiate transgressive aeolian sand sheets and dunefields are reviewed. The formation and evolution of a new transgressive aeolian sand sheet phase triggered by large‐scale shoreline erosion in South Australia is presented. According to the results from historical and satellite images, local shoreline erosion began in the late 1970s and has continued at highly variable rates. We show that once the foredune was removed, the high scarp created by wave erosion of the relict, vegetated transgressive dunefield destabilized and was then eroded by wind processes leading to the rapid development of a transgressive aeolian sand sheet. The initiation and evolution of the sand sheet provides an excellent example of how dunefields might respond to future sea level rise and climate change.

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The Holocene Coastal Barriers of Rio Grande do Sul

Cited by 63 publications

References 16 publications

High-Frequency Sequences in the Quaternary of Pelotas Basin (coastal plain): a record of degradational stacking as a function of longer-term base-level fall

High-Frequency Sequences in the Quaternary of Pelotas Basin (coastal plain): a record of degradational stacking as a function of longer-term base-level fall

Sedimentologia, cronologia e dinâmica progradacional das planícies costeiras de Campos Verdes e Ji (Laguna, SC)

Review and direct evidence of transgressive aeolian sand sheet and dunefield initiation

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