[meteorite-list] Crust Micrographs NWA 2371 Crystal Structure! Check it out!

From: STARSANDSCOPES at aol.com <STARSANDSCOPES_at_meteoritecentral.com>
Date: Fri, 23 Mar 2007 23:35:49 EDT
Message-ID: <ce6.b6ddb8d.3335f695_at_aol.com>

Hi list, Tom Phillips here, I have some crust micrographs taken in
reflected cross polarized light of a thick slice of NWA 2371 an H4. The
heating/cooling caused the crust to crystallize like nothing I have seen before.

I haven't posted them to the Gallery yet but it is well worth the time to
email me and I will send some shots in an email.

I would welcome any thoughts on this and if any one has noticed it before.
It really is cool!

If this hits the list more than once tonight, I forgot to send as text only
so I sent it again. Tom




In a message dated 3/23/2007 8:44:45 P.M. Mountain Daylight Time,
thebigcollector at msn.com writes:
Hello all,

Looking at crust on various thin sections under the microscope it is very
common to see a mineral, such as an olvine crystal, on top of the crust. It
is not as even as it appears to our naked eyes. A few old photographs on my
 
website illustrate this fairly well...

http://www.meteoritearticles.com/colthinsectioncrust.html

Here is the crust on an oriented Gao-Guenie...

http://www.meteoritearticles.com/znpgaots.html

Clear Skies,
Mark Bostick
www.meteoritearticles.com




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Received on Fri 23 Mar 2007 11:35:49 PM PDT