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Registros recuperados: 5
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A bone fragment of a probable aquatic vertebrate in the Serra Alta Formation (upper permian of Paraná Basin) Anais da ABC (AABC)
HACHIRO,JORGE; GIANNINI,PAULO C.F.; KINJO,RENATA N..
Tipo: Info:eu-repo/semantics/other
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652002000300024
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Holocene paleo-sea level changes along the coast of Rio de Janeiro, southern Brazil: Comment on Castro et al. (2014) Anais da ABC (AABC)
ANGULO,RODOLFO J.; GIANNINI,PAULO C.F.; SOUZA,MARIA CRISTINA DE; LESSA,GUILHERME C..
ABSTRACT The present work discusses and reinterprets paleo-sea level indicators used to build Holocene sea-level curve for the coast of Rio de Janeiro at former works. We conclude that: (a) the paleo-sea levels inferred by vermetid remains show that sea-level has fallen over the past 4400 years, at least; (b) the paleo-sea level inferred by the beachrock facies and dated shells of Jaconé shows that sea-level was near the present elevation between 8198 and 5786 years before present; and (c) several shells from other beachrocks were deposited probably thousands of years after the specimens died and consequently do not allow precise reconstructions of paleo-sea levels. These conclusions differ from the conclusions of the original paper.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Beachrock; Paleo-sea level reinterpretation; Sea-level curve; Vermetids; Tetraclita stalactifera.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000602105
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Luminescence characteristics of quartz from Brazilian sediments and constraints for OSL dating Anais da ABC (AABC)
GUEDES,CARLOS C.F.; SAWAKUCHI,ANDRé O.; GIANNINI,PAULO C.F.; DEWITT,REGINA; AGUIAR,VITOR A.P..
This study analyzes the optically stimulated luminescence (OSL) characteristics of quartz grains from fluvial, eolian and shallow marine sands of northeastern and southeastern Brazil, with especial focus on the applicability of the single-aliquot regenerative dose (SAR) dating protocol. All analyzed Brazilian sediments presented relatively high OSL sensitivity and good behavior regarding their luminescence characteristics relevant for radiation dose estimation. However, some samples from the Lençóis Maranhenses region in northeastern Brazil showed inadequate OSL sensitivity correction, hampering the implementation of the SAR protocol and their ability to behave as a natural dosimeter. While the shallow marine and eolian samples showed a narrow and reliable...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Optically stimulated luminescence (OSL) dating; Single-Aliquot Regenerative-Dose protocol (SAR); OSL sensitivity; Brazilian sands.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401303
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Morphology of the Ibiraqüera dunefield, SC Anais da ABC (AABC)
MARTINHO,CAROLINE T.; GIANNINI,PAULO C.F..
Tipo: Info:eu-repo/semantics/other
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652002000300026
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Reply to Castro et al. 2018 on “Holocene paleo-sea level changes along the coast of Rio de Janeiro, southern Brazil”. Anais da ABC (AABC)
ANGULO,RODOLFO J.; GIANNINI,PAULO C.F.; SOUZA,MARIA CRISTINA DE; LESSA,GUILHERME C..
ABSTRACT Discussions are useful to the advance of science, and we appreciate the opportunity to discuss the paper by Castro et al. (2014) for the second time. Here we maintain the interpretations presented in our discussion paper (Angulo et al. 2016). In the discussion paper we emphasized that the vertical position of a paleo-sea level indicator is not the position of the paleo-sea level. We pointed out that: (1) to reconstruct paleo-sea levels it is crucial to determine the vertical distance between the indicators to their present homologous one; (2) margin of errors can only be established if considering the indicator’s intrinsic characteristics and (3) the interpretation of a sea level 3.0 to 4.5 m below the present one at 11.9 to-11.1 ka BP is in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Beachrock; Vermetids; Relative sealevel indicators; Method of relative sealevel reconstruction.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401377
Registros recuperados: 5
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