[meteorite-list] Cooling rates

From: E.P. Grondine <epgrondine_at_meteoritecentral.com>
Date: Sun, 6 Sep 2009 10:47:44 -0700 (PDT)
Message-ID: <635219.3956.qm_at_web36906.mail.mud.yahoo.com>

Hi Steve, all -

I don't think they're due to repeated collisions.

Suppose that we have molten iron/nickle under incredible compression, which is then almost instantaneously released.

250 parent bodies seems like a lot. Perhaps instead there was more differentiation within fewer parent bodies.

Ed

--- On Sat, 9/5/09, Steve Dunklee <sdunklee72520 at yahoo.com> wrote:

> From: Steve Dunklee <sdunklee72520 at yahoo.com>
> Subject: Re: [meteorite-list] Cooling rates
> To: meteorite-list at meteoritecentral.com, "E.P. Grondine" <epgrondine at yahoo.com>
> Date: Saturday, September 5, 2009, 10:15 PM
> Interesting idea, as railroad
> drawheads and metal presses after repeated pounding over
> many years also show stress patterns which resemble
> Widmanstatten. So could it be repeated pounding from
> collisions in addition to slow cooling which contribute to
> the variety of patterns? I really have no Idea but believe
> it possible.
>
> http://www.materialsengineer.com/
>
> the second pic on the right looks like some
> widmanstattens'
>
> have a great day
>
> Steve
>
>
>
> --- On Sat, 9/5/09, E.P. Grondine <epgrondine at yahoo.com>
> wrote:
>
> > From: E.P. Grondine <epgrondine at yahoo.com>
> > Subject: [meteorite-list] Cooling rates
> > To: meteorite-list at meteoritecentral.com
> > Date: Saturday, September 5, 2009, 7:30 PM
> > Hi all -
> >
> > Could the Widmanstatten patterns simply be the result
> of
> > incredibly high compression instead?
> >
> > E.P.
> >
> >
> >
> > ______________________________________________
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> >
>
>
>
>


      
Received on Sun 06 Sep 2009 01:47:44 PM PDT