Blue gemstone is oldest known piece of earth
Published on February 26th, 2014 | by Admin0
Scientists using two different age-determining techniques have shown that a tiny zircon crystal found on a sheep ranch in Western Australia is the oldest known piece of our planet, dating to 4.4 billion years ago.
Writing in the journal Nature Geoscience on Sunday, the researchers said the discovery indicates that Earth’s crust formed relatively soon after the planet formed and that the little gem was a remnant of it.
Story: Will Dunham, SMH | Photo: University of Wisconsin