Geology and Geomorphology of Holocene Coastal Barriers of Brazil

Dillenburg, Sérgio Rebello; Hesp, Patrick A.

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

Cited by 98 publications

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“…to the present (e.g., Belknap and Kraft, 1981;Niederoda et al, 1985;Siringan and Anderson, 1994;Rodriguez et al, 2001;Dillenburg and Hesp, 2009;Goff, 2014;Schwab et al, 2014, Goff et al, 2015. This is also supported by recent analysis of shoreline change and profile evolution (e.g., Short, 2010;Schwab et al, 2013;Rosati et al, 2013;Houston and Dean, 2014).…”

Section: A Modelmentioning

confidence: 64%

Scale-dependent perspectives on the geomorphology and evolution of beach-dune systems

Walker

Davidson‐Arnott

Bauer

et al. 2017

Earth-Science Reviews

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100

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Section: A Modelmentioning

confidence: 64%

Scale-dependent perspectives on the geomorphology and evolution of beach-dune systems

Walker

Davidson‐Arnott

Bauer

et al. 2017

Earth-Science Reviews

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100

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“…This deposit represents a Holocene estuarine environment, as indicated by the muddy sediment and abundance of the mollusks T. plebeius (in life position), Erodona mactroides and Heleobia australis, and is positioned some 2 m above present sea-level (Caron, 2007). This deposit is part of the Barrier-Lagoon System IV and represents the last marine transgression (MIS 1), that reached an estimated amplitude of 4 ± 1 m above present sea-level in southern Brazil (Dillenburg & Hesp, 2009), thus it cannot be correlated to the fossil assemblage described here or to the samples E3, E4 and E5 of Closs & Forti (1971).…”

Section: Comparison With Other Fossil Assemblagesmentioning

confidence: 80%

A middle Pleistocene marine molluscan assemblage from the Southern coastal plain of Rio Grande do Sul State

Lopes¹,

Simone²,

Dillenburg³

et al. 2013

rev. bras. paleontol.

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-A marine molluscan assemblage is described from four fossil concentrations in the Coastal Plain of Rio Grande do Sul State, southern Brazil. The concentrations were found at the same stratigraphic interval, some 7.5 m above present sea-level, in a layer deposited in a shallow marine environment during the penultimate marine transgression around 230 ka BP and currently exposed along the banks of Chuí Creek, located some 11 km landwards of the present coastline. The assemblage is composed of a mixture of highly fragmented, unidentifi able shells and well-preserved bivalves and gastropods. Many bivalve remains are complete, including juveniles and thin-shelled taxa, lacking signs of abrasion or bioerosion. The origin of the shell concentrations is interpreted as a short-term depositional event, generated by storms, in shallow water settings under a marine transgressive regime. The predominant taxa in the assemblage are infaunal, stenohaline bivalves that inhabit shallow sandy bottoms, with few gastropods and epifaunal organisms. Most of the taxa have living representatives today in the southern Brazilian coast, indicating a mixture of Argentinean and Caribbean (or Brazilian) malacological provinces. The presence of taxa that are not found living in the coast of Rio Grande do Sul today (Anomalocardia brasiliana, Chione paphia, C. cancellata, Anadara brasiliana and Arcinella brasiliana), suggests warmer oceanographic conditions coinciding with past sea-level highstands, also indicated by similar taxa found in fossil concentrations in the Uruguayan and Argentinean coasts. A discussion of the stratigraphic position, age and correlation of this assemblage with other outcrops is also presented.Key words: Chuí Creek, Barrier System II, Pleistocene, fossil assemblage, paleobiogeography, paleoenvironment.RESUMO -Aqui é descrita uma assembleia de moluscos marinhos a partir de quatro concentrações fossilíferas encontradas na Planície Costeira do Estado do Rio Grande do Sul, Brasil. As concentrações foram encontradas na mesma posição estratigráfi ca, aproximadamente 7,5 m acima do nível atual do mar, em uma camada depositada em ambiente marinho raso durante a penúltima transgressão marinha em torno de 230 ka AP e atualmente exposta nas barrancas do Arroio Chuí, localizado aproximadamente 11 km da linha de costa atual. A assembleia é composta por uma mistura de conchas altamente fragmentadas, não identifi cáveis, bem como bivalves e gastrópodes bem preservados. Muitos bivalves são completos, incluindo juvenis e táxons de conchas fi nas, sem sinais de abrasão ou bioerosão. A origem dessas concentrações é interpretada como evento deposicional de curta duração, gerado por tempestade, em águas rasas sob regime marinho transgressivo. Os táxons predominantes na assembleia são bivalves estenohalinos infaunais que habitam fundos arenosos rasos, com poucos gastrópodes e organismos epifaunais. A maioria dos táxons ainda habita a costa sul do Brasil, indicando uma mistura das províncias malacológicas Argentina e Caribenha (ou Br...

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“…They range in size from the massive Patos/Mirim Lagoon system of southern Brazil with its 600 km-long barrier (Dillenberg and Hesp, 2009) and the 300 km-long Outer Banks barrier island chain off NC (Zaremba et al, 2016)) to the numerous small barriers (often <100 m long) that characterise the rocky coasts of South Africa (Cooper, 2001), eastern Australia (Roy et al, 2001;Sloss et al, 2006) and New…”

Section: Common Attributes and Spatial Variability In Barrier-lagoon mentioning

confidence: 99%

Geological constraints on mesoscale coastal barrier behaviour

Cooper

Green

Loureiro

2018

Global and Planetary Change

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Barrier/lagoon systems occupy a significant part of the world's coast. They are diverse in size, morphology, geological and oceanographic setting, and morphodynamic behaviour. Understanding the behaviour of barriers at 10 1 to 10 2 year and 10 1 to 10 2 kilometre scales (mesoscale) is an important scientific and societal goal, not least because of the preponderance of intensive coastal development in a time of global climate change. Such understanding presents significant challenges. Challenges in describing mesoscale system behaviour relate largely to the incomplete evidence base of (i) morphological change in system components, (ii) dynamic and internal forcing factors (drivers) and (iii) geological constraints. These shortcomings curtail the development of baseline datasets against which to test models. Understanding observed changes and thereby predicting future behavioural patterns demands assumptions and simplifications regarding the linkages between initial state, dynamic drivers, system feedbacks and a multiplicity of geological constraints that are often location-specific. The record of mesoscale change is improving with the acquisition of long-term morphological datasets. Advances in technology and chronological control mean that geological investigations can now provide decadal to century-scale temporal resolution of morphological change. In addition, exploratory modelling is improving understanding of the influence of various dynamic and geological factors. most cases unquantified and are usually disregarded when conceptualizing and modelling barrier evolution. Consideration of the geological influences is, however, essential in efforts to predict future behaviour at mesoscale (management) timescales.

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Geology and Geomorphology of Holocene Coastal Barriers of Brazil

Cited by 98 publications

References 0 publications

Scale-dependent perspectives on the geomorphology and evolution of beach-dune systems

Scale-dependent perspectives on the geomorphology and evolution of beach-dune systems

A middle Pleistocene marine molluscan assemblage from the Southern coastal plain of Rio Grande do Sul State

Geological constraints on mesoscale coastal barrier behaviour

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