[meteorite-list] what is the most primitve meteorite? or do we even know?

[mexicodoug at aim.com]

You're right Walter!  I don't know what can be measured as "ages" for 
pre-solar grains,other than their being classified by types, and rough 
ages of incorporation of the concretions (forming meteoroids which is 
of interest for the Solar System dymanics).  Who's measured the date of 
last supernova that left residue in our pre-Solar nebula?

Best wishes, great health,
Doug


-----Original Message-----
From: Walter Branch <waltbranch at bellsouth.net>
To: delraygoddess at yahoo.com; meteorite-list at meteoritecentral.com; 
mexicodoug at aim.com
Sent: Tue, 15 Apr 2008 6:42 am
Subject: Re: [meteorite-list] what is the most primitve meteorite? or 
do we even know?


Hi Doug, 
 
What about Tagish Lake? 
 
-Walter Branch 
________________________ 
----- Original Message ----- From: <mexicodoug at aim.com> 
To: <delraygoddess at yahoo.com>; <meteorite-list at meteoritecentral.com> 
Sent: Tuesday, April 15, 2008 6:33 AM 
Subject: Re: [meteorite-list] what is the most primitve meteorite? or 
do we even know? 
 
> Hi L.A., Listees, 
> 
> Just the white powdery "CAI" material which represents a small 
fraction of > Allende is the old snuff ... 
> 
> There are probably other carbonaceous chondrites of types similar to 
the > "age" of Allende from the recent vast harvest of the deserts ... 
but I > think scientists have a hard time splitting the hairs of the 
first couple > of million years when they are just dealing with excess 
concretes that > never were cleaned during the construction of this 
whole cool neighborhood > of the Sun we live in. 
> 
> Bjurbole is a standard and older than the hills of the Solar Sytem, 
as > well ... at least a standard to judge others: the oldies must all 
be > aroound 4,566,500,000 years old. or maybe a million more. 
> 
> Telling the age of a meteorite is kind of challenging since they are 
 > heterogenious. For example, a person is born and grows based on an > 
initial splitting of some strands of DNA. But if someone analyzed the > 
ends of your hair, the might find you older than all the men on the 
list > except Bob Haag and Ken (?), and Michael C. So how many 
inclusions > floating out there in places no one expects, I couldn't 
guess ... that are > older than old. 
> 
> Then, several listmembers may be older and know better, 
> 
> Best wishes and nice to see you posting, 
> Doug 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> -----Original Message----- 
> From: Leigh Anne DelRay <delraygoddess at yahoo.com> 
> To: meteorite-list at meteoritecentral.com 
> Sent: Tue, 15 Apr 2008 2:22 am 
> Subject: [meteorite-list] what is the most primitve meteorite? or do 
we > even know? 
> 
> 
> 
> Dear Listees~ 
> 
> I was wondering if anyone knows what the oldest (as in 
> most primitive) meteorite is? I was thinking it was 
> Allende, b/c it is believed to be of extra-solar 
> origin, but is there another one that is more 
> primitive than that? Is there one that is older than 
> our own solar system? 
> Thanks for letting me pick your brains. 
> ~L.A. DelRay 
> 
> 
> > 
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