AW: Re: [meteorite-list] Norwegian meteorite classificationguessinggame

[Martin Altmann]

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

And that Kainsaz has no cracks...


-----Ursprüngliche 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

>

>

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