by Autumn Riley on December 29th, 2005

Autumn Riley

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How old is the earth?

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  • by Erin Albrecht on January 3rd, 2006

    Erin Albrecht

    Most scientists accept the Earth to be approximately 4.5-4.6 billion years old.

    Evidence for this age comes from
    * Radiometric dating of rocks in Greenland, Australia, and the Great Lakes region of North America,
    * Radiometric dating of zircon crystals in Australian rocks,
    * Dating of moon rocks and meteorites, and
    * Measurements of lead isotopes, leading to the "model lead age."


    For more a more detailed treatment of the Earth's age, please see these websites:
    http://www2.nature.nps.gov/geology/usgsnps/gtime/ageofearth.pdf
    http://www.talkorigins.org/faqs/faq-age-of-earth.html
    http://en.wikipedia.org/wiki/Age_of_the_Earth

    Comments
    • Excellent links to reputable and reliable sites. Very helpful to list the major lines of evidence.

      xprofessor

      by xprofessor on May 15th, 2007

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