Scientists refine earth’s clock

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ScienceDaily: Earth Science News

Scientists refine Earth’s clock

Posted: 29 Mar 2012 11:19 AM PDT

New research has revealed that some events in Earth’s history happened more recently than previously thought. Scientists have refined the data used to determine how much time has passed since a mineral or rock was formed. They report uranium isotopic composition of minerals, used to date major geological events, which are more accurate than previously published.
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