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    $\begingroup$ Welcome to Earth Science! While this answer may theoretically answer the question, it is better to include the essential parts of the answer here, and provide the link for reference. $\endgroup$ Commented May 7, 2014 at 23:10
  • $\begingroup$ No problem. Starting to learn the StackEx etiquette! $\endgroup$ Commented May 8, 2014 at 14:46