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Old 04-13-2006, 04:39 PM   #106
ET Warrior
@ET Warrior
PhD in horribleness
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Join Date: Jun 2002
Location: Evil League of Evil
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If you can find Zircon crystals then it's a very straightforward process of determining their age, because Zircon crystals from with absolutely no lead, only Uranium. There are some matters that can complicate it, but it is known if they happened.

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