EPR dating of shells from Malhada Marsh, Rio de Janeiro, Brazil
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Annals of Marine Science
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The formation of the coastal plain of the Brazilian sea is mainly due to the fl uctuation of relative sea level in the past. Armação dos Buzios or simply Buzios is a
municipality in the microregion of lakes, in the state of Rio de Janeiro. In this region there is a lowland area about two meters above current sea level. This lowland area
is also known as coastal plain of Una River. It is expected that during the Holocene period the sea level reached a maximum about 2.5 meters above the current level.
During that time billions of mollusks lived and proliferated in the shallow waters around the coastal plain of the Una River. As they died their shells formed a layer in the soil
including Malhada Marsh that belongs to the Una River plain. In this study, shells were collected from this region and dated using the techniques of Electronic Paramagnetic
Resonance (EPR). Ages from 2480±130 to 4490±270 years were obtained. Radiocarbon dating were performed at the Beta Analytic Lab, USA for comparison with the EPR
results. Shells ages obtained are compatible with geological data from the Holocene period relative to past sea level fl uctuations.
Como referenciar
GOMES, M.B.; OLIVEIRA, L.M.; CORTEZ, B.; D'OCA, M.C.; TRANCHINA, L.; TOMARCHIO, E.; PARLATO, A.; CHUBACI, J.F.D.; GENNARI, R.; ROCCA, R.R.; D'ERRICO, F.; SOUSA, S.; WATANABE, S.; MARRALE, M. EPR dating of shells from Malhada Marsh, Rio de Janeiro, Brazil. Annals of Marine Science, v. 4, n. 1, p. 008-013, 2020. DOI: 10.17352/ams.000018. Disponível em: http://repositorio.ipen.br/handle/123456789/31456. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.