Carbon-14 in Patagonian Tree Rings

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Science  12 Sep 1969:
Vol. 165, Issue 3898, pp. 1123-1125
DOI: 10.1126/science.165.3898.1123


The radiocarbon activity found in tree rings from southern Argentina shows secular fluctuations which are synchronous with and of the same amplitude as those known for the Northern Hemisphere. Comparable measurements indicate that the activity in Patagonian trees is about five per mil lower than in European trees.

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