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University of Miami Radiocarbon Dates XII

Published online by Cambridge University Press:  18 July 2016

M Calvert
Affiliation:
Department of Geology, University of Miami, Coral Gables, Florida 33124
Kim Rudolph
Affiliation:
Department of Geology, University of Miami, Coral Gables, Florida 33124
J J Stipp
Affiliation:
Department of Geology, University of Miami, Coral Gables, Florida 33124
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The following radiocarbon dates are a partial list of samples measured since March 1977. The techniques used are the same as reported in R, v 16, p 402-408, and modified in R, v 18, p 210-220, with the following exception. A third liquid scintillation counter (Beckman LS-100) has been added and the shortened, low-K glass-counting vials have been replaced with teflon vials of Noakes (1975) design. Backgrounds on the counters were thus reduced from 9.1 cpm, 8.8 cpm and 4.9 cpm to 3.8 cpm, 3.5 cpm and 2.8 cpm, respectively, with an attendant small increase in efficiency.

Type
Date Lists
Copyright
Copyright © The American Journal of Science 

References

Lynts, G W, Judd, J B, and Stehman, C S, 1973, Late Pleistocene history of Tongue of the Ocean, Bahamas; Geol Soc America Bull, v 84, p 2665.2.0.CO;2>CrossRefGoogle Scholar
Noakes, J E, 1975, Considerations for achieving low level radioactivity measurements with liquid scintillation counters, in Liquid scintillation counting, v 4, Symposium on liquid scintillation counting Proc, Bath, England.Google Scholar
Stipp, J J, Eldridge, K L, Cohen, S J, and Webber, K, 1974, University of Miami radiocarbon dates I: Radiocarbon, v 16, p 402408.Google Scholar
Stipp, J J, Eldridge, K L, and Cadwell, R, 1976, University of Miami radiocarbon dates VI: Radiocarbon, v 18, p 210220.Google Scholar