AW: Re: [meteorite-list] Norwegian meteoriteclassificationguessinggame

From: Martin Altmann <altmann_at_meteoritecentral.com>
Date: Tue Jul 18 15:44:13 2006
Message-ID: <012801c6aaa2$86ea3e40$4f41fea9_at_name86d88d87e2>

Problem is, we have only 5 fresh CO3 falls, and there aren't so much pics
around....


Hmm did you note, that small specimens do have more often contraction cracks
than larger ones?



-----Urspr?ngliche Nachricht-----
Von: meteorite-list-bounces_at_meteoritecentral.com
[mailto:meteorite-list-bounces_at_meteoritecentral.com] Im Auftrag von Adam
Hupe
Gesendet: Dienstag, 18. Juli 2006 21:24
An: meteorite-list_at_meteoritecentral.com
Betreff: Re: Re: [meteorite-list] Norwegian
meteoriteclassificationguessinggame

Nor is it flat black and velvety.


----- Original Message -----
From: "Martin Altmann" <altmann_at_meteorite-martin.de>
To: <meteorite-list_at_meteoritecentral.com>; "'Adam Hupe'"
<raremeteorites_at_comcast.net>
Sent: Tuesday, July 18, 2006 12:20 PM
Subject: AW: Re: [meteorite-list] Norwegian meteorite
classificationguessinggame


http://fernlea.tripod.com/kainsaz2.jpg

And that Kainsaz has no cracks...


-----Urspr?ngliche Nachricht-----
Von: meteorite-list-bounces_at_meteoritecentral.com
[mailto:meteorite-list-bounces_at_meteoritecentral.com] Im Auftrag von Adam
Hupe
Gesendet: Dienstag, 18. Juli 2006 20:37
An: meteorite-list_at_meteoritecentral.com
Betreff: Re: Re: [meteorite-list] Norwegian meteorite
classificationguessinggame

Here is a great image on Mike Farmer's site that shows the contraction
cracks on a CO3 fall, Thank you Martin Altmann for providing this link
earlier. If you look very closely, you will see the faint webwork of
contraction cracks so typical of CO3s:

http://www.meteoriteguy.com/collection/images/kainsaz/DSCN5252-cp.jpg

Take Care,

Adam


----- Original Message -----
From: "Adam Hupe" <raremeteorites_at_comcast.net>
To: <meteorite-list_at_meteoritecentral.com>
Sent: Tuesday, July 18, 2006 11:23 AM
Subject: Re: Re: [meteorite-list] Norwegian meteorite classification
guessinggame


> Hi Martin and All,
>
> I don not think images are a good way to ascertain classifications but in
> this case I took a S.W.A.G. at it in the interest of fun. I think the
crust
> is wrong for a CO3 because virtually every sample of a CO3 I have seen has
> very fine contraction cracks, some do not even penetrate as deep as the
> matrix. These cracks show up in detailed images. These cracks are absent
in
> the enhanced image provided by a List member taken from an article on the
> new fall. The color of CO3 type crusts is usually semi-gloss black, never
> flat black like the one in the image. In my opinion, the crusts are always
> uniformly thin on a CO3 and never velvet-like and patchy.
>
> I think many feel it is a CO3 based on the numerous very small chondrules
> and not the crust. I agree the chondrules are too small for an LL, CV, CR,
> CK or even an L. They are too numerous for a CM2 which are sparsely
> populated. This leaves only CO, H or Anom types as candidates. I picked an
H
> type because I have seen examples with exceedingly small chondrules,
velvet
> like flat black crusts and friable matrixes.
>
> Take Care,
>
> Adam
>
>
> ----- Original Message -----
>
> From: "Martin Horejsi" <accretiondesk_at_gmail.com>
> To: "Adam Hupe" <raremeteorites_at_comcast.net>
> Cc: "Michael Farmer" <meteoritehunter_at_comcast.net>;
> <meteorite-list_at_meteoritecentral.com>
> Sent: Tuesday, July 18, 2006 5:46 AM
> Subject: Re: Re: [meteorite-list] Norwegian meteorite classification
> guessing game
>
>
> > On 7/17/06, Adam Hupe <raremeteorites_at_comcast.net> wrote:
> > > The crust is wrong for a CO3. The famous "Out House Hammer Stone", I
> can
> > > smell history in the making!
> >
> > Hi Adam,
> >
> > In what way do you think the crust is wrong for a CO3?
> >
> > Just curious.
> >
> > Martin
>
>
> ______________________________________________
> Meteorite-list mailing list
> Meteorite-list_at_meteoritecentral.com
> http://six.pairlist.net/mailman/listinfo/meteorite-list


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Received on Tue 18 Jul 2006 03:44:03 PM PDT