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Interrelation of radiocarbon ages from bone fractions in the Brazilian Intertropical Region

Published online by Cambridge University Press:  17 May 2023

Mário André Trindade Dantas Open the ORCID record for Mário André Trindade Dantas [Opens in a new window]  and
Alexander Cherkinsky
Mário André Trindade Dantas*
Affiliation:
Laboratório de Ecologia e Geociências, Universidade Federal da Bahia (UFBA/IMS/CAT), Vitória da Conquista, Bahia cep 45029-094, Brazil
Alexander Cherkinsky
Affiliation:
Center for Applied Isotope Studies, University of Georgia, Athens, Athens, Georgia 30602, USA
*
*Corresponding author at: Laboratório de Ecologia e Geociências, Universidade Federal da Bahia (UFBA/IMS-CAT), Vitória da Conquista, Bahia cep 45029-094, Brazil. E-mail address: matdantas@yahoo.com.br (M.A.T. Dantas).
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Abstract

There is a consensus in the literature that radiocarbon dating performed on bioapatite often produces ages younger than dating performed on collagen. We propose a general regression that could be used to convert the bioapatite radiocarbon ages to the simulated ages on collagen in fossil samples worldwide. This general regression presents several good indices of quality, high correlation (R2 = 0.98), lower values of percent predicted error (%PE = 0.01), and standard error of the estimate (%SEE = 21.83), showing that it is a good tool, as the predicted values are similar to those observed. Using this regression, we converted the radiocarbon ages of bioapatite to the expected age from the collagen fraction made for several taxa from the Brazilian Intertropical Region (BIR) and suggest that these dates could be 1–7 cal ka BP older than previously thought.

Keywords

Reduced major axis regressionLate Pleistocene14C AMSBioapatiteCollagenMammalsBrazilian Intertropical Region
Type
Contributions to the QR Forum
Information
Quaternary Research , Volume 115 , September 2023 , pp. 202 - 206
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Copyright
Copyright © University of Washington. Published by Cambridge University Press, 2023

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