Hello again,
Let me ask a more direct question.
Admittedly, the pictures aren't very interesting at first glance. But, with
a closer look, I'm hoping you can actually pick out the small crystals
sticking out of the matrix. I've re-read Norton's artice in the May 04
issue of Meteorite magazine and don't find any mention of this phenomenon.
Is this type of think in the matrix of most/all chondrites, just harder to
pick out of most unless in thin section?
I don't believe this piece is very weathered. I've seen very weathered NWA
material where the metal has completely oxidized and the silicates are
breaking down that almost look porous. I don't believe that to be the case
here.
Would these crystals have formed after-the-fact, or accreted along with the
chondrules? What would they be? Some are more transparent and some seem
quite black. I'm very much a newbie at the minerals.
Thanks again,
Phil
----- Original Message -----
From: "Phil Morgan" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Monday, September 11, 2006 7:37 PM
Subject: [meteorite-list] porous chondrite
Hello everyone,
Great thread on Neumann lines!
The list has generally been a bit quiet so thought I'd share something and
solicite opinions.
The links below (reasonable quality hopefully) are of an NWA at 20x. The
matrix is quite porous and of a sandy texture. Anyone know of anything
classified that might look similar? Any observations or comments?
broken exterior:
http://i25.photobucket.com/albums/c57/pkmorgan/porous%20OC/exterior.jpg
cut surface:
http://i25.photobucket.com/albums/c57/pkmorgan/porous%20OC/cut.jpg
largest chondrule:
http://i25.photobucket.com/albums/c57/pkmorgan/porous%20OC/chondrule.jpg
Thanks for viewing and regards!
Phil
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