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US Geological Survey, Denver, Colorado Radiocarbon Dates III

Published online by Cambridge University Press:  18 July 2016

I C Yang ,
R L McAvoy  and
R L Emerson
I C Yang
Affiliation:
US Geological Survey, Denver, Colorado 80225
R L McAvoy
Affiliation:
US Geological Survey, Denver, Colorado 80225
R L Emerson
Affiliation:
US Geological Survey, Denver, Colorado 80225
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This list contains the results of measurements made during 1978 and 1979. Ages were computed on the radiocarbon half-life of 5568 ± 30 years. Statistical errors quoted herein are 1σ counting errors which include sample, background, and standard. The age limit reported is calculated on the basis of 3σ activity. The σ13C values in table 1 were measured by Krueger Enterprises, Inc, Geochron Laboratories Division1 and calculated based on Craig's Peedee Belemnite (PDB) limestone standard (Craig, 1957). The total alkalinity as bicarbonate values reported in table 1 was determined using techniques described by Brown, Skougstad, and Fishman (1970). Unless otherwise stated, all samples were collected and submitted by personnel of the US Geological Survey.

Type
Date List
Information
Radiocarbon , Volume 23 , Issue 1 , 1981 , pp. 24 - 32
Copyright
Copyright © The American Journal of Science 

References

Brown, Eugene, Skougstad, M W, and Fishman, M J, 1970, US Geological Survey techniques of water resources investigations: Book 5, Chap A1, p 42–44.Google Scholar
Calf, G E and Polach, H A, 1974, Teflon vials for liquid scintillation counting of carbon-14 samples, in Stanley, P E and Scoggins, B A, eds, Internatl symposium on liquid scintillation counting, recent developments: New York, Academic Press, p 223.Google Scholar
Craig, Harmon, 1957, Isotopic standards for carbon and oxygen and factors for mass-spectrometric analysis of carbon dioxide: Geochim et Cosmochim Acta, v 12, p 133–149.Google Scholar
Noakes, J E, Kim, S M, and Akers, L K, 1967, Recent improvements in benzene chemistry for radiocarbon counting: Geochim et Cosmochim Acta, v 31, p 1094–1096.Google Scholar
Schroder, L J, Beetem, W A, Claassen, H C, and Emerson, R L, 1973, US Geological Survey, Denver, Colorado radiocarbon dates I: Radiocarbon, v 15, p 469–478.CrossRefGoogle Scholar
Schroder, L J, Emerson, R L, and Beetem, W A, 1978, US Geological Survey, Denver, Colorado radiocarbon dates II: Radiocarbon, v 20, p 200–209.Google Scholar
Yang, I C and Emerson, R L, 1980, Teflon vials for low-level C-14 liquid scintillation counting, in Peng, C T, Horrocks, D L, and Alpen, E L, eds, Internatl conf on liquid scintillation counting, recent applications and developments: New York, Academic Press, v 2, p 181–197.Google Scholar