Fig. 9: Analytical uncertainty as function of non-radiogenic 207Pb in the samples. | Nature Communications

Fig. 9: Analytical uncertainty as function of non-radiogenic 207Pb in the samples.

From: Arctic speleothems reveal nearly permafrost-free Northern Hemisphere in the late Miocene

Fig. 9

The isochron 208Pb/207Pb-235U/207Pb age of 8.68 ± 0.09 Ma is marked by the grey line. The samples become less radiogenic from left to right, causing the 208Pb/207Pb ratio to increase from 0 (left) to 2.5 (right). The age uncertainty (vertical error bars, 2σ) becomes larger in this direction as well.

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