Relative sea-level curve during the Holocene in Rio de Janeiro, Southeastern Brazil: A review of the indicators - RSL, altimetric and geochronological data

Castro, João Wagner Alencar; Seoane, José Carlos Sícoli; Fernandes, Daniel; Cabral, Caique Lima; Cunha, Aline Meneguci da; Malta, Julia Varella; Miguel, Lucas Lavo António Jimo; Oliveira, Camila Areias de; Spotorno, Paula; Tâmega, Frederico Tapajós de Souza

doi:10.1016/j.jsames.2021.103619

Cited by 5 publications

(4 citation statements)

References 51 publications

(146 reference statements)

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“…Other dates for the Brazilian coast have a more representative rise during this time interval, in a maximum transgression of around 5.1 ka BP, as shown by Suguio et al (1985), Martin et al (2003), Bezerra et al (2003), Caldas et al (2006), andCastro et al (2021). However, Angulo and Lessa (1997) stated that the maximum sea level, at the end of the marine transgression, was between 3.5 m and 4 m at most.…”

Section: Discussionmentioning

confidence: 86%

Beachrocks of the northeast of Brazil: local effects of sea level fluctuations in a far-field during in Holocene

Ferreira Júnior,

Stattegger,

Camargo

et al. 2024

Ocean Coast. Res.

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Along the coast of the state of Pernambuco, NE Brazil, the presence of coastal outcrops aligned with the shoreline and distributed above and below the mean sea level is remarkable. These outcrops were sampled, and petrological, isotopic, and geochronological analyses were integrated to investigate the local effects of the Holocene sea-level fluctuations. The results indicate that the rocks are recent (< 8ka), formed by cementation of beach sands (magnesian calcite cement, predominance of quartz and presence of marine bioclasts, signs of compaction, fractures, and dissolution), in a tropical climate and warm waters, which allows to classify them as typical examples of beachrocks. The carbonate cement consisted of Mg-rich calcite with values ranging from −1.1‰ to 3.5‰ for δ 13 C and from −0.9‰ to 0.5‰ for δ 18 O VPDB . These isotopic values are typical of marine carbonate cemented deposits in shallow marine environments under freshwater influence (meteoric vadose environment). In these conditions, the cementing processes occurred in the intertidal zones, which reinforce the use of these data as indicators of ancient sea levels. The sea level fluctuations could be divided, in chronological order, into three different phases, starting with a rapid sea level rise followed by a relative stabilization at a maximum level and, finally, a decreasing phase. Recent sea level fluctuations in Pernambuco are represented by beachrocks with ages between 8 ka and 800 years and a maximum level of 2 to 3 meters above the present mean level. In scenarios of a near future with a general global sea level rise pattern, significant local geomorphological changes may occur, which means a great future challenge to society.

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Section: Discussionmentioning

confidence: 86%

Beachrocks of the northeast of Brazil: local effects of sea level fluctuations in a far-field during in Holocene

Ferreira Júnior,

Stattegger,

Camargo

et al. 2024

Ocean Coast. Res.

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“…The sea level fluctuations in southern coast of Africa are detailed by Ramsay (1995), Armitage et al (2006) and Humphries et al (2016). These local sea level curves acting on coastal barriers systems appear to have similarities with those found in other regions of the Southern Hemisphere such as those by Martínez and Rojas (2013), Castro et al (2014), Angulo et al (2006), Dillenburg et al (2017), Dillenburg et al (2020), Barboza, Dillenburg, Lopes, et al (2021), Barboza, Dillenburg, do Nascimento Ritter, et al (2021), Alencar Castro et al (2021) and Angulo et al (2022). The late Holocene evolution of these coastal barrier systems presents clear similarities, and it seems that the comparison among them gives a window to discuss about climate change and relative sea level changes in the southern Hemisphere.…”

Section: Introductionmentioning

confidence: 73%

“…yrs. BP for southern Africa (Ramsay, 1995), in Brazil (Alencar Castro et al, 2021; Angulo et al, 2022; Castro et al, 2014), in Argentina and Uruguay (Isla, 1989).…”

Section: Discussionmentioning

confidence: 99%

“…found in the protocol of the Beta Analytic laboratory site (https://www.radiocarbon.com/ams-dating-sediments.htm).The multiproxy data obtained from different methods and techniques were compared, and the geochronological data were described and interpreted based on sea level curves presented byRamsay (1995),Armitage et al (2006) andHumphries et al (2016). These local sea level curves, and those found in other regions of the Southern Hemisphere such as byMartínez and Rojas (2013),Castro et al (2014),Angulo et al (2006),Dillenburg et al (2017Dillenburg et al ( , 2020,Barboza, Dillenburg, Lopes, et al (2021),Barboza, Dillenburg, do Nascimento Ritter, et al (2021), Alencar Castro et al (2021 andAngulo et al (2022), helped understand some paleoclimatic variables related to the evolution of a late Holocene coastal barrier system found at Bilene in Mozambique.…”

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confidence: 99%

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Late Holocene evolution of a coastal barrier system at Bilene, Mozambique

Miguel,

Costa

2023

Earth Surf Processes Landf

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This research attempts to provide a contribution to the study on coastal barrier‐lagoons in the SE Africa generated by sea‐level fluctuations, and climate change during the Late Holocene. To achieve this goal, the grain‐size analysis and morphoscopic description helped to detect cyclic facie sequences with sediments sized over 200 μm mixed with silt, bioclasts and organic matter. Moreover, the magnetic susceptibility and X‐ray diffraction (XRD) analyses displayed over 90% of quartz and isolated mica, feldspar and heavy minerals. Additionally, the X‐ray fluorescence (XRF) results display the interplay between terrigenous (>Ti and Al) and marine influence (S, Cl and ~Ca) over the last ~3,500 cal. yrs. BP. The geochemical tracer fluctuations detected suggest five distinct deposits including beach, washover, lacustrine system, aeolian deflation that rest on top of the Pleistocene palaeodunes, which are tentatively associated with the sea‐level variations, extreme marine events or with local floods. Although the multiproxy data record refers to a study in Bilene‐Mozambique, it is interesting to understand the mechanisms and variables related to the evolutionary dynamics of coastal barrier lagoons generated by sea‐level fluctuations and climate change, especially in the SE Africa.

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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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Relative sea-level curve during the Holocene in Rio de Janeiro, Southeastern Brazil: A review of the indicators - RSL, altimetric and geochronological data

Cited by 5 publications

References 51 publications

Beachrocks of the northeast of Brazil: local effects of sea level fluctuations in a far-field during in Holocene

Beachrocks of the northeast of Brazil: local effects of sea level fluctuations in a far-field during in Holocene

Late Holocene evolution of a coastal barrier system at Bilene, Mozambique

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

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