Holocene Marine Transgression in the Coastal Plain of Rio Grande do Sul, Brazil: Palynomorph and Diatom Evidence

Medeanic, Svetlana; Torgan, Lezilda Carvalho; Clerot, Luiz Carlos Pinheiro; Santos, Cristiane Bahi dos

doi:10.2112/07-0935.1

Cited by 27 publications

(26 citation statements)

References 19 publications

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“…These ancient coastal lagoonal and fluvial plains were gradually colonised by the Atlantic Forest. The forest development after coastal regression was also identified in other palynological studies in the Santa Catarina Negrelli 2001, Amaral et al 2012) and Rio Grande do Sul coastal plains (Cordeiro and Lorscheitter 1994, Neves and Lorscheitter 1992, Meyer et al 2005a, b, Medeanic 2006a, Macedo et al 2007, Medeanic et al 2009). …”

Section: Discussionsupporting

confidence: 60%

Paleoenvironmental evolution of the coastal plain of Southern Brazil: palynological data from a Holocene core in Santa Catarina State

Kuhn

Souza

Cancelli

et al. 2017

An. Acad. Bras. Ciênc.

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This paper presents a paleoenvironmental reconstruction from palynological analyses of a sedimentary core of Holocene age, drilled at municipality of Garopaba (Santa Catarina), Southern Brazil. A total of 46 samples was collected for palynological analyses in the 450 cm-long core PCSC-3, as also three samples for radiocarbon dating and granulometric analyses. The palynological content includes 84 taxa related to pollen grains of angiosperms (38) and gimnosperm (3), spores of pteridophyta (16) and bryophyta (2), spores of fungi (8), algae (3), acritarchs (3), dinoflagellate cysts (2) and microforaminiferal linings (1). Three specimens of acritarchs are described and illustrated in detail. Three palynological phases were defined based on changes in assemblages: Phase I, Phase II and Phase III. The Phase I is characterized as a lagoonal paleoenvironment with marine influence from the beginning of the sedimentation (5390 cal yr BP), based on occurrences of acritarchs, dinoflagellate cysts and microforaminiferal linings. The Phase II (3032 yr BP until 858 cal yr BP) also is characterized by a lagoonal paleoenvironment, however, presented decrease in percentage of marine elements and increase in freshwater algae record, suggesting less marine influence in the lagoonal body. In Phase III (last 856 years), underwater sedimentation prevailed, under swamp-like conditions.

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Section: Discussionsupporting

confidence: 60%

Paleoenvironmental evolution of the coastal plain of Southern Brazil: palynological data from a Holocene core in Santa Catarina State

Kuhn

Souza

Cancelli

et al. 2017

An. Acad. Bras. Ciênc.

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“…The inference of marine incursion over Coastal Plains is supported by other studies on the coastal plain of Santa Catarina (Behling & Negrelli, 2001;Amaral et al, 2012;Angulo et al, 2006;Kuhn et al, 2017), as well as in Coastal Plain of Rio Grande do Sul (Lorscheitter & Dillenburg, 1998;Meyer et al, 2005;Medeanic et al, 2009). Similarly, the Coastal Plain of the South Atlantic margin of South America offers further environmental proxies (Martínez & Rojas, 2013;Mourelle et al, 2015;Candel & Borromei, 2016).…”

Section: Final Remarkssupporting

confidence: 56%

New Insights on the systematic classification of certain palynological taxa (tintinnomorphs) from Holocene deposits of the Coastal Plain of Southern Brazil

Silva¹,

Souza²,

Waveren³

2017

Rev. bras. paleontol.

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-Tintinnomorphs is a term used for the grouping of palynomorphs resembling organic remains of tintinnids, which are not always identifiable as true lorica, cysts or pouch, being able to correspond to other protozoans and may even represent others structures of distinct organisms, such as rotifers and turbellarians. This paper presents tintinnomorphs recorded in Holocene sediments of the well PSC-03, drilled in the Coastal Plain of Santa Catarina, southern Brazil. A total of six tintinnomorphs types is described and illustrated (SPHERO-1, ELELNO-14, ESABNO-6, HEXANO-2, RECTNO-1, AROBNO-3), some of which are compared with specimens previously reported from Quaternary deposits of southern Brazil, southern South America and other regions of the world. Although tintinomorphs are associated to marine palynomorphs, they cannot be used as a conclusive paleoenvironmental evidence due to uncertainties about their biological affinity.Key words: tintinnomorphs, tintinnids, Holocene, Coastal Plain of Santa Catarina.RESUMO -Tintinomorfos é um termo usado no agrupamento de palinomorfos assemelhados a restos orgânicos de tintinídeos, os quais nem sempre são passíveis de serem identificados como verdadeiras lóricas, cistos ou bolsas, podendo corresponder a outros protozoários e até representar outras estruturas de organismos distintos, como rotíferos e turbelários. Este trabalho apresenta tintinomorfos registrados em sedimentos do Holoceno do poço PSC-03, perfurado na Planície Costeira de Santa Catarina, sul do Brasil. Um total de seis tipos de tintinomorfos é descrito e ilustrado (SPHERO-1, ELELNO-14, ESABNO-6, HEXANO-2, RECTNO-1, AROBNO-3), alguns dos quais comparados a espécimes previamente registrados em depósitos quaternários do sul do Brasil, sul da América do Sul e outras regiões do mundo. Embora estejam associados a palinomorfos marinhos, tintinomorfos não podem ser utilizados como indicadores paleoambientais conclusivos devido às incertezas sobre sua afinidade biológica.

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“…A study by Medeanic et al (2009) used palynomorphs and diatoms to characterize the Holocene marine transgression in the coastal area of southern Brazil. More recently, Medeiros (2010), Santos (2010), and Vilela (2010) carried out an integrated study that analyzed palynomorphs and siliceous microorganisms (i.e., silicoflagellates, marine sponge spicules, and diatom frustules) in core sediments from a littoral zone in southern Brazil.…”

Section: Microorganisms As Past Relative Sea Level Indicatorsmentioning

confidence: 99%

Indicators of Holocene sea level changes along the coast of the states of Pernambuco and Paraíba, Brazil

Suguío

Barreto

Oliveira

et al. 2013

Geol. USP, Sér. cient.

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This study deals with the Holocene relative sea level (RSL) changes along the Brazilian northeastern coast, in particular along the states of Pernambuco and Paraíba. It presents 25 sea level superficial indicators, dominantly of a biological nature (i.e., vermetid gastropod tubes encrusted on rocky surfaces, as well as mollusk shells in live positions contained within beachrocks and paleomangrove deposits). Moreover, diatomological and palynological analyses have been carried out on a drilling core obtained from the Olhos d'Água lagoon (Southeastern Recife, Pernambuco state) with a length of about 2.7 m and age of about 8,300 cal yr BP at the base. The envelope RSL change curve obtained through the interpretation of the data indicates that, after reaching the current level ~ 7,400 cal yr BP, a sea level culmination of ~ 3 m above sea level was attained between 4,000 -5,000 cal yr BP, and a general trend of sea level drop occurred until the present, with possible phases of slight oscillations. This is consistent with the oscillation frequency of microscopic marine and freshwater organisms in the sediment core.

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Holocene Marine Transgression in the Coastal Plain of Rio Grande do Sul, Brazil: Palynomorph and Diatom Evidence

Cited by 27 publications

References 19 publications

Paleoenvironmental evolution of the coastal plain of Southern Brazil: palynological data from a Holocene core in Santa Catarina State

Paleoenvironmental evolution of the coastal plain of Southern Brazil: palynological data from a Holocene core in Santa Catarina State

New Insights on the systematic classification of certain palynological taxa (tintinnomorphs) from Holocene deposits of the Coastal Plain of Southern Brazil

Indicators of Holocene sea level changes along the coast of the states of Pernambuco and Paraíba, Brazil

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