[meteorite-list] Nice CAI in a CV3

From: Martinh <martinh_at_meteoritecentral.com>
Date: Tue Feb 8 22:51:13 2005
Message-ID: <65b804d3c77d0f3c9cb88d9e47154279_at_isu.edu>

Hi all CAI lovers,

Looking at the jelly doughnut (chondrule-filled CAI), I wondered if the
appearance could be misleading. I have seen some CAIs that are rather
convoluted meaning in a 3-D view, they might form a cone or other shape
where if cut along the right plane, it would appear as if the CAI was
completely surrounding the chondrules, but in reality, the chondrule
material is actually inside more of a CAI pipe or ice cream cone.
Therefore in a cross-section, say through the top of an ice cream cone,
it would appear that the cone material was completely encasing the ice
cream, but in reality, it is not.

Just some thoughts when looking at a wonderful collection of CAIs from
around the world. This is what makes this list fun!

Cheers,

Martin H



On Feb 8, 2005, at 8:25 PM, Rob Wesel wrote:

> I have enjoyed every one of these as NWA 3118 is a favorite of mine
> but John's in particular begs the question:
>
> If CAI's are the oldest things out there then how does chondritic
> material get completely encapsulated inside of one?
>
> We have a lot to learn from this meteorite.
>
> Rob Wesel
> http://www.nakhladogmeteorites.com
> ------------------
> We are the music makers...
> and we are the dreamers of the dreams.
> Willy Wonka, 1971
>
>
>
> ----- Original Message ----- From: "John Birdsell"
> <birdsell_at_email.arizona.edu>
> To: <meteorite-list_at_meteoritecentral.com>
> Sent: Tuesday, February 08, 2005 12:34 PM
> Subject: Re: [meteorite-list] Nice CAI in a CV3
>
>
>> Hello Martin and Matteo....Those are definitely nice CAIs, but
>> definitely check out the CAI at this link!!!
>>
>> http://www.arizonaskiesmeteorites.com/AZ_Skies_Links/NWA_2364/
>> index.html
>>
>>
>> Cheers
>>
>>
>> -John
>>
>>
>>
>> M come Meteorite Meteorites wrote:
>>
>>> This is others nice CAI's in my NWA CV
>>>
>>> http://it.geocities.com/mcomemeteoritecollection/NWA1807.JPG
>>>
>>> http://it.geocities.com/mcomemeteoritecollection/NWA2180gr.8.9.JPG
>>>
>>> Matteo
>>>
>>>
>>> --- Martinh <martinh_at_isu.edu> ha scritto:
>>>> Hi All,
>>>>
>>>> At the Tucson show, I picked up a nice NWA end
>>>> section with a wonderful CAI. I know, I know, its not an historic
>>>> L6, but it
>>>> is pretty cool anyway.
>>>>
>>>> When I do talks about the solar system, I like to
>>>> pass around a CAI for the obvious reasons. Now I can hold one up in
>>>> front
>>>> of a class and everyone can see it.
>>>>
>>>> Here are some pics of the piece:
>>>>
>>>> http://challenge.isu.edu/nwa2086.html
>>>>
>>>> Notice the smaller CAI island that drifted off the
>>>> mainland, looking somewhat like Madagascar off the east coast of
>>>> Africa.
>>>>
>>>> Any thoughts on the CAI would be appreciated.
>>>>
>>>> Happy viewing.
>>>>
>>>> Martin H
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
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>>>>
>>>>
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>>>
>>>>
>>>>
>>>
>>> =====
>>> M come Meteorite - Matteo Chinellato
>>> Via Triestina 126/A - 30030 - TESSERA, VENEZIA, ITALY
>>> Email: mcomemeteorite2004_at_yahoo.it
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>>
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Received on Tue 08 Feb 2005 10:51:02 PM PST