[meteorite-list] iron meteorites and earth origins

[E.P. Grondine]

Hi all - 

I'm setting something of a personal record here today
-  we all get enough messages, and I have to remember
that not everything requires my personal comment, but
in this case, here goes - 

IF only NASA would provide us with some decent new
crater counts from the moons of Jupiter and Saturn, it
would save us from a lot of theory and computer
models.

The differentation in irons these folks are seeing may
have come from only one proto-planet whose accretion
suddenly stopped, say 3.8 billion years ago.

In closing, we still don't have a unified accretion
model which accounts for all of the craters.

Good hunting - 
EP


--- "Sterling K. Webb" <sterling_k_webb at sbcglobal.net>
wrote:

> Hi,
> 
> Jerry posted this archive of papers to the List,
> and it's great place and not cheap about putting the
> whole original paper up on the website (whether it
> appeared in some journal where you can't get it 
> without the big bucks). The PSRD is a trove of
> nuggets.
> 
> This paper is an extension (or maybe the same one)
> of a study at the SwRI (Southwest Research
> Institute);
> Ron Baalke posted on it in January, and one of a
> series 
> of pieces mounting evidence that the final accretion
> of
> the solar system (if not earlier) must have involved
> a 
> great deal of planetesimal mixing across wide
> orbital
> zones. 
> 
> The opposite notion, of narrow and uniform zones 
> of formation, has been an axiom of many differing
> schools of thought on solar system formation for
> 30-40 
> years (and implied for much longer), and it now
> increasingly appears to be untrue. 
> 
> Is the fall of a paradigm in the wind?
> 
> 
> Sterling K. Webb
> ------------------------------------------------
> ----- Original Message ----- 
> From: "Darren Garrison" <cynapse at charter.net>
> To: <Meteorite-list at meteoritecentral.com>
> Sent: Saturday, July 22, 2006 1:15 AM
> Subject: Re: [meteorite-list] iron meteorites and
> earth origins
> 
> 
> On Fri, 21 Jul 2006 23:06:23 -0400, you wrote:
> 
>
>http://www.psrd.hawaii.edu/July06/asteroidGatecrashers.html
> 
> Very interesting article-- everyone should check it
> out.
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