Abstract
RECENT contributions1–3 on post-Proterozoic geo-chronology are timely, for national organizations in the U.S.S.R. and in the United States are now preparing reports on this topic for submission to the International Geological Congress next year. In the recent discussions two questions have been raised: (a) the validity of the extended time-scale proposed by investigators at the University of Oxford; and (b) the validity of age determinations made on the Upper Cambrian kolm of Sweden. On both these issues there is much more evidence than has been cited.
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DAVIDSON, C. The Geological Time-Scale. Nature 184, 1310 (1959). https://doi.org/10.1038/1841310a0
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DOI: https://doi.org/10.1038/1841310a0
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