[meteorite-list] Fusion crusts on stony meteorites

[Pat Brown]

Hi All, 

I bought a slice of this meteorite from Marcin at
Tucson. While I am not a professional meteoriticist, I
am an engineer heavily involved with failure analysis,
use of microscopes and a trained observer. To my eye
these are most definitely small bits of this meteorite
fractured off of the parent body during transit of the
atmosphere and incorporated in the fusion crust,
likely on the back side of the meteorite. I had to
have this slice the minute that ET pointed out to me
this interesting feature! Thanks to ET for the heads
up and thanks to Marcin for doing an excellent job of
slicing and polishing this meteorite and offering it
for sale. 

Pat 
--- Darren Garrison <cynapse at charter.net> wrote:

> On Thu, 22 Mar 2007 22:05:51 -0700, you wrote:
> 
> >Michael, Darren, Jim and list,
> >
> >I agree with Jim on this.  My slice of the same
> stone has fragments set in a
> >clearly bubbly melt.  I suggest that this
> accumulated on the back side of
> >the stone during oriented flight.  Check out my
> pictures:
> >
>
>http://www.johnkashuba.com/Pages/Meteorite%20Pages/Pictures/NWA2826LL5.htm
> 
> This photo does look pretty convincing-- the
> triangular fragment in the melt
> looks like like a close match to the bigger mass:
> 
>
http://www.johnkashuba.com/Images/Meteorite%20Pages/Pictures/NWA2826LL561g@2400MFOV1cmP800.jpg
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