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“Quickie” 14C Dates

Published online by Cambridge University Press:  18 July 2016

Henry N Michael  and
Elizabeth K Ralph
Henry N Michael
Affiliation:
Radiocarbon Dating Laboratory, Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104
Elizabeth K Ralph
Affiliation:
Radiocarbon Dating Laboratory, Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104
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The extension of the bristlecone pine chronology, which is, thus far, the only complete tree-ring-dated series that extends beyond 6000 bc and which is used for the calibration of radiocarbon dates, has been going on over the past 22 years, that is, ever since Schulman (1956; 1958) established the extremely old ages of the bristlecone pine. The few people in this world who search for very old wood samples to extend a dendrochronology may appreciate a method of establishing quickly the approximate ages of the samples.

Type
Notes and Comments
Information
Radiocarbon , Volume 23 , Issue 1 , 1981 , pp. 165 - 166
Copyright
Copyright © The American Journal of Science 

References

Ferguson, C W, 1970, Dendrochronology of bristlecone pine, Pinus aristata. Establishment of a 7484-year chronology, in Olsson, I U, ed, Radiocarbon variations and absolute chronology, Nobel sympsoium, 12th, Proc: Stockholm, Almqvist & Wiksell p 237–259.Google Scholar
Schulman, E, 1956, Dendroclimatic changes in semi-arid America: Tucson Univ Arizona Press.Google Scholar
Schulman, E, 1958, Bristlecone pine, the oldest known living thing: Nat Geog Mag, v 113, no. 3, p 355–372.Google Scholar