Hi Jeff, I think, it's weathered out - better "washed out" - matrix material, which has also removed some larger chondrules. Some ordinary chondrites - like Bjurb�le or Saratov - got very soft and powdery matrix material. Chondrules can easily be removed from these meteorites.
J�rn > -----Urspr�ngliche Nachricht----- > Von: Jeff Kuyken [mailto:[EMAIL PROTECTED] > Gesendet: Mittwoch, 18. August 2004 13:51 > An: Meteorite List > Betreff: Re: [meteorite-list] Meteorite with holes?!? > > > Hey Graham, > > That's a really good point which I also considered too > however the stone is > no less solid than most other ordinary chondrites out there. > The holes are > also too varied in size and often of an irregular nature to > be the result of > dislodged chondrules. Quite a few are also more of an oval shape too. > Apologies as that's probably a little hard to see in the > photos. If they are > vesicles, I don't know how they could have formed. Maybe the > stone was part > of a larger impact melt? > > Thanks, > > Jeff Kuyken > I.M.C.A. #3085 > www.meteorites.com.au > ----- Original Message ----- > From: Graham Christensen > To: Meteorite List > Sent: Wednesday, August 18, 2004 9:10 PM > Subject: Re: [meteorite-list] Meteorite with holes?!? > > > It looks to me like the holes are just where chondrules > have fallen out of > the matrix. From what I understand, vesicles form by gas > being "boiled > out" > of liquid rock. That's why they've only been found in a > eucrite, because > it's an igneous rock. It's wierd that that is the only one > that looks like > that though. Perhaps a loose matrix or something? > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > Graham Christensen > [EMAIL PROTECTED] > http://www.geocities.com/aerolitehunter > msn messenger: [EMAIL PROTECTED] > > > ----- Original Message ----- > From: "Jeff Kuyken" <[EMAIL PROTECTED]> > To: "Meteorite List" <[EMAIL PROTECTED]> > Sent: Wednesday, August 18, 2004 5:03 AM > Subject: [meteorite-list] Meteorite with holes?!? > > > > G'day List, > > > > Just received what looks like an ordinary chondrite, but > the weird thing > is > > that it is loaded with holes in the surface. The 37g > piece has 6 sides > of > > which every one has some type of hole. They are quite prolific > throughout > > the whole stone and vary widely in size. I've created a > quick page at > the > > address below if anyone is interested in taking a look. I > will probably > > slice it at some stage to check out the interior and will > post more > photos > > at that stage. I'd be interested in hearing any comments > or theories on > this > > one as this is the first meteorite I've personally seen > with so many > holes. > > > > http://www.meteoritesaustralia.com/features/holes.html > > > > Cheers, > > > > Jeff Kuyken > > I.M.C.A. #3085 > > www.meteorites.com.au > > > > ______________________________________________ > > 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
