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UCLA Radiocarbon Dates X

Published online by Cambridge University Press:  18 July 2016

Rainer Berger  and
Jonathon Ericson
Rainer Berger
Affiliation:
Institute of Geophysics, Departments of Anthropology and Geography, University of California, Los Angeles, California 90024
Jonathon Ericson
Affiliation:
Department of Anthropology and Peabody Museum, Harvard University, Cambridge, Massachusetts 02138
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The measurements reported in this date list form the chronometric framework for obsidian hydration and trade studies in California (Ericson, 1975; 1977; 1978; 1981; Ericson et al, 1975; Singer and Ericson, 1977). All samples were analyzed as CO2 gas at close to 1 atm in a 7.5L proportional counter with three energy channels. Radiocarbon ages are based by convention on the 5568 ± 30 yr half-life. The biospheric standard is 95% the count rate of NBS oxalic acid for radiocarbon laboratories. Background is based on CO2 obtained from marble. Counter operation is checked against a historically dated wood sample from the funerary boat of Sesostris III, 1872 +4 −8 BC (Hayes, 1962). All samples were subjected to accepted NaOH, HCl or other special chemical treatments to exclude contamination. No tree-ring calibration was applied to any of the samples listed.

Information

Type
Research Article
Information
Radiocarbon , Volume 25 , Issue 1 , 1983 , pp. 129 - 136
Copyright
Copyright © The American Journal of Science 

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