The most common type of twinning in chondrules in unmetamorphosed chondrites
is found in low-Ca clinopyroxenes. It is polysynthetic twinning -- it looks
like the pyroxene grains have narrow stripes. These disappear when
temperatures go above 630 C or so and won't be found in orthopyroxene.
Alan
Alan Rubin
Institute of Geophysics and Planetary Physics
University of California
3845 Slichter Hall
603 Charles Young Dr. E
Los Angeles, CA 90095-1567
phone: 310-825-3202
e-mail: [email protected]
website: http://cosmochemists.igpp.ucla.edu/Rubin.html
----- Original Message -----
From: "Jim Wooddell" <[email protected]>
To: <[email protected]>
Sent: Saturday, February 22, 2014 5:52 AM
Subject: [meteorite-list] Types of twinning in chondrites?
Hi all,
I was wondering, for those that are experienced with petrology, what types
of crystal twinning to do see the most in OC's?
Thanks!
Jim
--
Jim Wooddell
[email protected]
http://pages.suddenlink.net/chondrule/
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