[meteorite-list] Age of chondrites and achondrites

[Pelé Pierre-Marie]

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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