Thursday, December 3, 2009

earths crust composition from: http://mistupid.com/geology/earthcrust.htm

  • Oxygen 46.6%
  • Silicon 27.8%
  • Aluminum 8.1%
  • Iron 5.0%
  • Calcium 3.6%
  • Sodium 2.8%
  • Potassium 2.6%
  • Magnesium 2.0%
  • others 1.6%
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