Oldest Fragment of Earth Ever Found is Confirmed to be 4.4 Billion Years Old

February 24, 2014 by  
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If you thought that diamonds were forever , they have absolutely nothing on the zircon of Jack Hills, Australia. Professor of geoscience at the University of Wisconsin , John Valley has confirmed that this bit of Earth’s crust is the oldest fragment of the planet ever found at 4.375 billion years old. Using a technique called “atom-probe tomography,” Valley and his fellow scientists dated the zircon with more accuracy than previous methods. Not only did they confirm the zircon’s spectacular age, but also solidified the theory that early Earth was cool and had temperatures low enough to sustain liquid water and a hydrosphere. Read the rest of Oldest Fragment of Earth Ever Found is Confirmed to be 4.4 Billion Years Old Permalink | Add to del.icio.us | digg Post tags: atom-probe tomography , australia , early earth , earth’s oldest fragment , geology , geoscience , jack hills , john valley , lead atoms , university of wisconsin-madison , zircon        

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Oldest Fragment of Earth Ever Found is Confirmed to be 4.4 Billion Years Old

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