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RE: Petrologic Grade 5 question

To: "'INTERNET:meteorite-list@meteoritecentral.com'" <meteorite-list@meteoritecentral.com>
Subject: RE: Petrologic Grade 5 question
From: walt radomsky <meteorite@compuserve.com>
Date: Sat, 14 Mar 1998 03:28:19 -0500
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----------
From:  INTERNET:meteorite-list@meteoritecentral.com
Sent:  Friday, March 13, 1998 10:28 PM
To:  INTERNET:meteorite-list@meteoritecentral.com
Subject:  Petrologic Grade 5 question

>I just purchased a very large (1.5kg) slice of Wellman(a).  It is a
>former Nininger piece.  Wellman (a) is an H5 found in 1940 with  total
>weight of 50kg, e.  It exhibits a fresh brown/black matrix and nice well
>defined chondrules in the black to grey range 

Matt (and everyone else), I don't understand.  I thought a petrologic grade
of
5 would indicate chondrules that are not well defined or in other words,
not
very distinct.  There would not be much distinction between the boundry of
the
chondrules and the matrix.  Would someone explain this to me?  Thanks.

-Walter 

Check out Dr Zanda's chondrule paper at Lang's website.

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