Posted by xxxx on Sunday, May 10, 2009 at 12:57pm.
Your post could be labeled "Geology" and you could begin with this GOOGLE Search:
http://www.google.com/search?q=methods+of+determining+the+age+of+a+rock&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a
Sra
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