Matt, For some reason I never thought of a Ureilite as primitive per say. Maybe it is just me. :) Exposing ignorance is a way of life for some...like myself.
Thanx, John -------------- Original message from "Matt Morgan" : -------------- > John: > I am sure Adam will have something to add but here is a good description > of Ureilites > http://www.daviddarling.info/encyclopedia/U/ureilite.html > > I always thought that all ureilites were "primitive". So someone please > enlighten us! > Matt Morgan > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > [EMAIL PROTECTED] > Sent: Tuesday, September 28, 2004 10:51 AM > To: [EMAIL PROTECTED] > Subject: [meteorite-list] primitive Ureilite ? > > > Hello all, > > I was reading one of Adam's auctions this morning and noticed the word > primitive attached to the word Ureilite and began to wonder what was the > latest status on Ureilites being considered "primitive". I know the word > is used with primitive materials like Acapulcoites and Lodranites > because their age is suggested at the chondrite level of 4.5+ billion > years. > > I believe this reference for Ureilites infers the involvement of > pre-solar or solar parts such as the diamonds versus a formation age of > 4.5 billion years. Or maybe I'm wrong about that. At one time the > diamonds were thought to be shock/pressure related, but recently > Ureilites with low-shock values have been found that has scientists > thinking that the diamonds came from some other source. > > What is considered the formation age of Ureilites? And does that age in > itself make them primitive, or does the parts/pieces make them > considered primitive? > > Curious, > > John/JD > > > > ______________________________________________ > Meteorite-list mailing list > [EMAIL PROTECTED] > http://six.pairlist.net/mailman/listinfo/meteorite-list > > > ______________________________________________ > Meteorite-list mailing list > [EMAIL PROTECTED] > http://six.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list
