[meteorite-list] Norwegian meteorite classification guessinggame

[Adam Hupe]

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
>
>
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