Or perhaps, cause the smaller specimens break of later in the air, can develope only a thinner crust, which contracts easier than a thicker one?
-----Ursprüngliche Nachricht----- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Adam Hupe Gesendet: Dienstag, 18. Juli 2006 21:47 An: [email protected] Betreff: Re: Re: [meteorite-list] Norwegian meteoriteclassificationguessinggame "Hmm did you note, that small specimens do have more often contraction cracks than larger ones?" More surface area to mass in the case of small objects. Interesting observation. Adam ----- Original Message ----- From: "Martin Altmann" <[EMAIL PROTECTED]> To: <[email protected]>; "'Adam Hupe'" <[EMAIL PROTECTED]> Sent: Tuesday, July 18, 2006 12:44 PM Subject: AW: Re: [meteorite-list] Norwegian meteoriteclassificationguessinggame 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? -----Ursprüngliche Nachricht----- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Adam Hupe Gesendet: Dienstag, 18. Juli 2006 21:24 An: [email protected] Betreff: Re: Re: [meteorite-list] Norwegian meteoriteclassificationguessinggame Nor is it flat black and velvety. ----- Original Message ----- From: "Martin Altmann" <[EMAIL PROTECTED]> To: <[email protected]>; "'Adam Hupe'" <[EMAIL PROTECTED]> 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... -----Ursprüngliche Nachricht----- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Adam Hupe Gesendet: Dienstag, 18. Juli 2006 20:37 An: [email protected] 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" <[EMAIL PROTECTED]> To: <[email protected]> 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" <[EMAIL PROTECTED]> > To: "Adam Hupe" <[EMAIL PROTECTED]> > Cc: "Michael Farmer" <[EMAIL PROTECTED]>; > <[email protected]> > Sent: Tuesday, July 18, 2006 5:46 AM > Subject: Re: Re: [meteorite-list] Norwegian meteorite classification > guessing game > > > > On 7/17/06, Adam Hupe <[EMAIL PROTECTED]> 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 > [email protected] > http://six.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
