News of the WeekGeochemistry

Geologists Find Vestige of Early Earth--Maybe World's Oldest Rock

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Science  26 Sep 2008:
Vol. 321, Issue 5897, pp. 1755
DOI: 10.1126/science.321.5897.1755a

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Summary

On page 1828 of this week's issue of Science, geologists report the discovery of rock in northern Quebec on Hudson Bay that records the existence of the earliest crust. The Canadian rock may also be the oldest known rock by 300 million years.