Talk:Concordia dating

I confess that I can't make heads or tails of this article, or any other article i was able to find on the topic online. Perhaps we should take the time to make this more accessible to a person who has no idea what it's about? I think a brief summary of the physical aspects of the methodology would be helpful. To start, what rocks are they using, and what are they measuring in the rocks? What are zircons, and why do they believe the lead is removed from them? Ungtss 05:19, 22 December 2005 (GMT)