News of the WeekGeochemistry

Two Geologic Clocks Finally Keeping the Same Time

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Science  25 Apr 2008:
Vol. 320, Issue 5875, pp. 434-435
DOI: 10.1126/science.320.5875.434

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Summary

Geochronologists report on page 500 of this week's issue of Science that they have used variations in Earth's orbit to recalibrate one of their isotopic clocks, bringing it into agreement with the other.