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Arizona Radiocarbon Dates VIII*

Published online by Cambridge University Press:  18 July 2016

C. Vance Haynes Jr.
Affiliation:
Dept. of Geosciences, University of Arizona, Tucson, Arizona 85721
Donald C. Grey
Affiliation:
Dept. of Geosciences, University of Arizona, Tucson, Arizona 85721
Austin Long
Affiliation:
Dept. of Geosciences, University of Arizona, Tucson, Arizona 85721
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The carbon isotopic analyses reported here covers the period since the last list (Haynes et al., 1967) until summer 1969. All results relating to secular C14 fluctuations in atmospheric CO2 are now published separately (Damon et al., 1970). Sample preparation and counting procedures remain essentially unchanged since completion of our conversion to CO2 in 1960. All δC13 values are reported relative to PDB and all C14 dates, unless otherwise noted, are based on the 5568 year half-life, but are not corrected for C13 content. 0.95 NBS oxalic acid activity is our routine standard periodically monitored for isotopic fractionation.

Type
Research Article
Copyright
Copyright © The American Journal of Science 

References

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