[meteorite-list] primitive Ureilite ?

From: j.divelbiss_at_att.net <j.divelbiss_at_meteoritecentral.com>
Date: Tue Sep 28 13:21:59 2004
Message-ID: <092820041720.20466.41599D51000C037600004FF221603831169C9C070D040A90070BD206_at_att.net>

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: meteorite-list-bounces_at_meteoritecentral.com
> [mailto:meteorite-list-bounces_at_meteoritecentral.com] On Behalf Of
> j.divelbiss_at_att.net
> Sent: Tuesday, September 28, 2004 10:51 AM
> To: meteorite-list_at_meteoritecentral.com
> 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
>
>
>
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Received on Tue 28 Sep 2004 01:20:18 PM PDT