[meteorite-list] Did Gibeons Collide?

From: John Birdsell <birdsell_at_meteoritecentral.com>
Date: Tue Feb 15 19:53:14 2005
Message-ID: <42129976.6030107_at_email.arizona.edu>

Hi Ruben....I think that it may reflect the progression of cooling from
different regions which resulted in different crystaline patterns
intersecting. I'm sure someone on the list will have a good explanation.
We had one with three distinct patterns which was pretty cool too! Check
it out:


http://www.arizonaskiesmeteorites.com/AZ_Skies_Links/Etched_Meteorites/Etched_Gibeon/3130gEtched_Gibeon/index.html


Cheers


-John & Dawn
Arizona Skies Meteorites



Ruben Garcia wrote:

>Hi All,
>Can someone explain this...
>Is it as simple as two Gibeons colliding in space? Or
>is there some other explanation?
>
>This is the 1st cut on a larger Gibeon meteorite. It
>is common practice for me to etch the 1st piece
>immediately after it is cut. I do this without any
>sanding or polishing. Its done for the purpose of
>checking the etch ( I like to make sure it is a rich
>brilliant etch before slicing and dicing the entire
>meteorite.) When this beautiful etch began to appear I
>started to see two completely different widmanstatten
>patterns appearing. when the etch was complete after
>only a few minutes this is what I saw. I've cut and
>etched hundreds of iron meteorites and etched
>thousands of slices and never before seen such a
>distinct separation in two patterns on the same
>meteorite.
>Has anyone else ever seen ( outside of a museum)
>something like this?
>
>
>
>http://www.geocities.com/meteoritemall/gib1.JPG
>http://www.geocities.com/meteoritemall/gib2.JPG
>http://www.geocities.com/meteoritemall/gib3.JPG
>http://www.geocities.com/meteoritemall/gib4.JPG
>http://www.geocities.com/meteoritemall/gib5.JPG
>
>Thanks, Ruben
>
>
>
>__________________________________
>Do you Yahoo!?
>The all-new My Yahoo! - Get yours free!
>http://my.yahoo.com
>
>
>______________________________________________
>Meteorite-list mailing list
>Meteorite-list_at_meteoritecentral.com
>http://six.pairlist.net/mailman/listinfo/meteorite-list
>
>
>
Received on Tue 15 Feb 2005 07:53:10 PM PST