Late Holocene coastal dynamics, climate pulses and low terraces in the coast of the state of São Paulo, southeast, Brazil

Souza, André De; Filho, Archimedes Pérez

doi:10.1016/j.jsames.2019.03.015

Cited by 10 publications

(13 citation statements)

References 47 publications

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“…The morphostratigraphic analysis is based on previous studies that seek to identify surface features and forming units differentiated or not through contiguous features (e.g., Corrêa, 2001; Fonseca et al, 2020; Mello et al, 1995; Souza and Perez Filho, 2019). According to Fonseca et al (2020), the morphostratigraphic analysis is based on the study of geomorphological, sedimentological, and pedological properties to describe the different depositional units.…”

Section: Methodsmentioning

confidence: 99%

“…Moreover, Blum and Tornqvist (2000) highlight the variations in the base level caused by eustatic fluctuations that may result in downcutting, aggradations, and lateral displacement of fluvial channels, which incise coastal geomorphic systems. Recent studies have also shown that coast evolution links with the river discharge variations resulting from the Late Holocene climate events (e.g., Arnaud-Fassetta, 2003; Peres et al, 2018; Souza and Perez Filho, 2019).…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Methodsmentioning

confidence: 99%

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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“…Thus, the discontinuities in the marine units of the RIR right bank deposit seem to have resulted from the upper layers fine translocation as pointed out by Souza and Perez Filho (2019). Also, grain size results indicating fine fractions increases in the FM-Me-md discontinuity and the adhering particle on the quartz grains reinforces the illuviation processes in layers differentiation process.…”

Section: Discussionmentioning

confidence: 74%

“…The relief of the Ribeira de Iguape estuarine system (RIES), located in Southern São Paulo state, Brazil, has resulted from complex interactions between multiple geomorphological attributes (Martinez et al, 2018; Souza and Perez Filho, 2020) and the complexity associated with the area evolution also correlates with multi-scale processes such as the relative sea level (RSL) changes and marine transgression and regression episodes (e.g. Suguio et al, 1978;Angulo et al, 2006;Sawakuchi et al, 2008;Guedes et al, 2011a;Castro et al, 2014;Souza and Perez Filho, 2019). Furthermore, Souza and Perez Filho (2019) pointed out that marine transgression and regression events that occurred in the Iguape and Ilha Comprida region during the Late Holocene were triggered by oscillation on the sedimentary continent-ocean balance induced by precipitation variations established with Holocene climate Pulses.…”

Section: Introductionmentioning

confidence: 99%

“…From this perspective, the aim of this research was to investigate if the quartz grain microtextures and morphologies from the fluvial-marine deposits correspond with the depositional environments previously identified by Souza and Perez Filho (2019). Additionally, the surficial cover of the other hypothesized fluvial-marine terrace on the left bank that presents unclear erosive-depositional discontinuities, contrasting with that located on the right bank of the Ribeira de Iguape river, was also analyzed.…”

Section: Introductionmentioning

confidence: 99%

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Scanning Electron Microscopy (SEM) in the surficial cover analysis of the low fluvial-marine terraces in the southern coast of São Paulo state, Brazil

Souza

Filho

2022

Rev. Bras. Geomorfol.

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The Ribeira de Iguape estuarine system in Southeastern Brazil has resulted from the complex interactions betweenallogenic (climate, tectonics, and human interventions) and autogenic geomorphological processes. Early studies have shownthat the relationship between sedimentary balances, fluvial discharge, and Holocene climate pulses resulted in the coastlinedisplacement and low fluvial-marine terraces morphogenesis, which are composed of the marine and fluvial sedimentaryunits. In this perspective, this study aimed to investigate whether the microtextural and morphological records on the quartzgrains associated with the different allostratigraphic units (marine and fluvial) correspond to the paleoenvironmentsidentified in previous studies. In this study we have used a combination of analyses (grain-size, microtextural, and absolutedating) applied to the surficial cover sampled from two fluvial-marine terraces located on the right and left banks of theIguape river channel. The results show correspondences between paleoenvironments and microtextures found on the quartzgrains, confirming the statements addressed in previous studies that indicated the coastline was positioned about 9 kminland around 3.5-2.7 ka.

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Fluvial responses to Holocene climatically induced coastline migration in the Iguape River estuary (Southeast Brazil)

Souza,

Filho,

Arruda

et al. 2024

Earth Surf Processes Landf

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Rivers represent intricate geomorphological systems that exhibit sensitivity to even subtle base‐level changes. This study examines the geomorphological response of Ribeira de Iguape River, located along the southern coast of São Paulo state, Brazil, to hydrological changes and coastline migration resulting from Holocene climate pulses. Using a multidisciplinary approach, including geomorphological and stratigraphical analyses, optically stimulated luminescence dating, grain‐size analyses, interpretation of satellite images, mapping and reassessment of previous studies, we investigated the potential impacts of these geomorphological dynamics on the river system. Our study reveals two distinct orders of low fluvial terraces, typically inserted no more than 10 m above the average channel discharge, which are geochronologically correlated with the low marine terraces that document the former coastline position at the river mouth, as previously identified in other studies. Such findings indicate a deposition phase when the coastline was stabilised on the inner continent in the Medieval Warm Period, as well as an erosion phase when the coastline migrated seaward during the Little Ice Age. This research contributes to improving our understanding of how rivers can respond to base‐level changes and provides valuable insights into the dynamic interactions between river systems and coastal environments.

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Late Holocene coastal dynamics, climate pulses and low terraces in the coast of the state of São Paulo, southeast, Brazil

Cited by 10 publications

References 47 publications

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

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

Scanning Electron Microscopy (SEM) in the surficial cover analysis of the low fluvial-marine terraces in the southern coast of São Paulo state, Brazil

Fluvial responses to Holocene climatically induced coastline migration in the Iguape River estuary (Southeast Brazil)

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