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New Accelerator Mass Spectrometry (AMS) Ages Suggest a Revision of the Electron Spin Resonance (ESR) Middle Holocene Dates Obtained for a Toxodon platensis (Toxodontidae, Mammalia) from Southeast Brazil

Published online by Cambridge University Press:  18 July 2016

Walter Neves ,
Alex Hubbe  and
Ivo Karmann
Walter Neves
Affiliation:
Laboratório de Estudos Evolutivos Humanos, Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, 277, CEP 05508-090, São Paulo, SP, Brazil
Alex Hubbe*
Affiliation:
Laboratório de Estudos Evolutivos Humanos, Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, 277, CEP 05508-090, São Paulo, SP, Brazil
Ivo Karmann
Affiliation:
Departamento de Geologia Sedimentar, Instituto de Geociências, Universidade de São Paulo, Rua do Lago, 562, CEP 05508-900, São Paulo, SP, Brazil
*
Corresponding author. Email: alexhubbe@yahoo.com
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Abstract

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In a paper published in Applied Radiation and Isotopes, Baffa et al. (2000) reported a Middle Holocene date (∼6.5 kyr BP) for a specimen of Toxodon platensis from Ribeira do Iguape, southeast Brazil, using the emergent technique electron spin resonance (ESR). Through an accelerator mass spectrometry (AMS) procedure applied on tooth collagen, we provide a new set of dates to test the accuracy of the ages generated by ESR. We obtained 2 dates more than 4500 BP older than the previous one, suggesting a minimum Late Pleistocene age for the specimen.

Type
Notes and Comments
Information
Radiocarbon , Volume 49 , Issue 3 , 2007 , pp. 1411 - 1412
Copyright
Copyright © 2007 by the Arizona Board of Regents on behalf of the University of Arizona 

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