[meteorite-list] Weird Brecciated or Dual-Lithology Meteorites - Photos

From: Galactic Stone & Ironworks <meteoritemike_at_meteoritecentral.com>
Date: Sat, 18 Jul 2009 23:18:37 -0400
Message-ID: <e51421550907182018q46e0a0c1q226eaa02923bc6ae_at_mail.gmail.com>

Hi List,

I cut open 2 more oddball UNWA stones today.

One had relatively fresh black crust and weighed 10 grams before I cut
it. I was pleasantly surprised to see 2 distinct zones within the
matrix. One is lighter, one is darker. The metal flecks seem
uniformly distributed across both zones, but the division between the
2 lithologies is very linear and easy to see. My question is, since
this stone is so small, does it represent a dual lithology type, or is
it a piece of a larger meteoroid that was brecciated?

Two-color Matrix -
http://i268.photobucket.com/albums/jj24/Meteoritethrower/Meteorites/breccia-dual/2-zones-1.jpg

Close-up of one half of the stone -
http://i268.photobucket.com/albums/jj24/Meteoritethrower/Meteorites/breccia-dual/2-zones-2.jpg

The crusted exterior of the 2-color stone -
http://i268.photobucket.com/albums/jj24/Meteoritethrower/Meteorites/breccia-dual/2-zones-whole.jpg

...

This next stone is very unusual to me and I am keenly interested in
hearing some feedback from the List about it. What is it? The
exterior shows typical desert varnish. It could even be a
convincing-looking meteorwrong. But, it's attracted to a magnet and
when I cut it open, I saw numerous metal blebs and this wonderful
brecciated matrix. Can you see "Pac Man" in the matrix?

Brecciated Matrix -
http://i268.photobucket.com/albums/jj24/Meteoritethrower/Meteorites/breccia-dual/breccia-1.jpg

Another shot of the breccia -
http://i268.photobucket.com/albums/jj24/Meteoritethrower/Meteorites/breccia-dual/breccia-2.jpg

A polished slice of the breccia, tilted at angle to show the metal -
http://i268.photobucket.com/albums/jj24/Meteoritethrower/Meteorites/breccia-dual/breccia-iron.jpg

Outside of the brecciated stone -
http://i268.photobucket.com/albums/jj24/Meteoritethrower/Meteorites/breccia-dual/breccia-outside.jpg

Any opinions on what these stones might be, especially the second one?

Best regards,

MikeG

-- 
.........................................................
Michael Gilmer (Florida, USA)
Member of the Meteoritical Society.
Website - http://www.galactic-stone.com
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Received on Sat 18 Jul 2009 11:18:37 PM PDT