[meteorite-list] Example of Lipping and direction stumper. TAKE 2

From: Frank Cressy <fcressy_at_meteoritecentral.com>
Date: Sun, 26 Jul 2009 20:01:48 -0700 (PDT)
Message-ID: <619906.8597.qm_at_web80201.mail.mud.yahoo.com>

Hi McCartney, Michael and all,

I agree with Michael that this is the back side of an oriented meteorite. The lipping shows that. I also agree with him that it flipped during flight and that this side was once the leading side, but but neccessarily because of the flow lines. Generally the front side of an oriented meteorite has thinner crust than the rear side. Since we can see many chondrules through the crust, I think that the thin crust supports that it was once the leading edge.

Cheers,

Frank

--- On Sun, 7/26/09, Michael Blood <mlblood at cox.net> wrote:


From: Michael Blood <mlblood at cox.net>
Subject: Re: [meteorite-list] Example of Lipping and direction stumper. TAKE 2
To: mccartney at blackbearddata.com, "Meteorite List" <meteorite-list at meteoritecentral.com>
Date: Sunday, July 26, 2009, 7:41 PM


Hi McCartney,
? ? ? ? In the photo, first of all, if it is an oriented meteorite (and it
seams to be) one is looking at the flat back side. One can see SOME
Lipping on the left - especially, the upper left, but this specimen
certainly does not display much in the way of lipping.
? ? ? ? In addition, some of the flow lines (very slight) on the back
indicate that during part of the fall, the flat "back side"? of the stone
Flipped around and was the face (or one might say it spent some
Time tumbling as it moved through the atmosphere).
? ? ? ? All of these and many more phenomena will be explained with
LOTS of photos in my book which is nearly ready to "go to print" and
Should be available shortly.
? ? ? ? I have narrowed down the name and it will be, ASPECTS OF ORIENTED
METEORITES or METEORITES SHOWING ASPECTS OF ORIENTATION.
? ? ? ? Best wishes, Michael


On 7/26/09 4:00 PM, "McCartney Taylor" <mccartney at blackbearddata.com> wrote:

> http://outofabluesky.com/images/stories/stoneymeteorites/allende12-7.jpg
>
> This is an Allende. I'm not sure I understand the orientation signs I see.
>
> I see a star flow line pattern which indicates this side is windward. But the
> lipping on the NW side hints the side is leeward. So I'm a bit confused.
>
> Any ideas on alternate interpretations?
>
> -mt
>
>
>
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Received on Sun 26 Jul 2009 11:01:48 PM PDT