[meteorite-list] Age of chondrites and achondrites

From: Pelé Pierre-Marie <pierremariepele_at_meteoritecentral.com>
Date: Tue Nov 8 13:17:26 2005
Message-ID: <20051108181723.82374.qmail_at_web25812.mail.ukl.yahoo.com>

Hello to the List.

Until recently, I learned that chondrites were the
oldest igneous stones in the solar system (4.56
billion years) as coming from undifferentiated parent
bodies.

A recent study on angrite Sahara 99555 concluded to
the fact that this achondrite was the oldest stone
ever analyzed.

It's a fantastic news. Can you explain me why this
achondrite (and maybe others) were formed before
primitive chondrites ?

Best regards,

Pierre-Marie PELE


        

        
                
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Received on Tue 08 Nov 2005 01:17:23 PM PST