1. ESR dating of Toxodon teeth from Baixa Grande, Bahia, Brazil.
- Author
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Costa Ribeiro, Ricardo da, Kinoshita, Angela, Araújo-Júnior, Hermínio Ismael de, Figueiredo, Ana Maria Graciano, Souza Carvalho, Ismar de, and Baffa, Oswaldo
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ELECTRON spin resonance dating , *GEOCHRONOMETRY , *ELECTRON paramagnetic resonance , *TEETH , *MEGAFAUNA - Abstract
Although the extinct Quaternary megafauna is widely recorded in northeastern Brazil, geochronological studies carried out on its fossiliferous deposits are still scarce. In this study, Electron Spin Resonance (ESR) was applied to date 12 tooth fragments of Toxodon platensis (Mammalia, Notoungulata) collected in the tank deposit of Lago do Rumo, Baixa Grande, state of Bahia, Brazil. The results obtained in the geochronological analysis performed here reveal ages from around 60 ka to 34 ka for T. platensis in Lagoa do Rumo; and, considering the integration data in the paleontological literature, our results evidence the largest time-averaging ever recorded for tank deposits: around 51 thousand years. • Twelve teeth of Toxodon platensis from Brazilian Northeast were dated using Electron Spin Resonance. • Absolute dating revealed fossils of Toxodon platensis ranging from around 60 ky to 34 ky. • Considering the literature, time-averaging in Lagoa do Rumo is around 51 thousand years. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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