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Geological Survey of Canada Radiocarbon Dates X

Published online by Cambridge University Press:  18 July 2016

J. A. Lowdon ,
R. Wilmeth  and
W. Blake Jr.
J. A. Lowdon
Affiliation:
Division of Quaternary Research and Geomorphology, Geological Survey of Canada, Ottawa.
R. Wilmeth
Affiliation:
Archaeology Division, National Museum of Man, Ottawa.
W. Blake Jr.
Affiliation:
Division of Quaternary Research and Geomorphology, Geological Survey of Canada, Ottawa.
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The laboratory routinely operates two proportional counters; one 2-L (Dyck and Fyles, 1962) and one 5-L (Dyck et al., 1965). CO2 is used as the counting gas. The 2-L counter is operated mainly at 2 atm. and the 5-L counter mainly at 1 atm. On occasion the 2-L counter is operated at 1 atm. and the 5-L counter at 4 atm. No changes have been made in the CO2 preparation and purification techniques described in previous GSC dating lists (Lowdon et al., 1969; Lowdon and Blake, 1970).

Type
Research Article
Information
Radiocarbon , Volume 12 , Issue 2 , 1970 , pp. 472 - 485
Copyright
Copyright © The American Journal of Science 

Footnotes

†

Prepared by the first author, who operates the laboratory. The date list has been compiled by the second and third authors from descriptions of samples and interpretations of dates by the collectors.

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