Howdy, all. I agree that we can make educated guesses with "high degrees of certainty", but until it's come from the lab calling something unclassified by a definitive classification is incorrect, despite how "apparent" its petrological type appears to be.
Gary, I can't tell you that meteorite is not a type 3, but I also cannot say definitively that it is. It probably is, but that's as far as I would go. :) Michael in so. Cal. On Fri, Jun 7, 2013 at 9:02 AM, Gary Fujihara <[email protected]> wrote: > Aloha Jeff, Rob, Michael, and Scott, > cc; metlist > > I can agree with both sides of the argument, that the only way to be > absolutely sure an ordinary chondrite is a type 3 is to have it analyzed. > > However, many type 3 ordinary chondrite meteorites feature external > characteristics that allow them to be recognized without analysis, or even > being cut open, with a high degree of certainty. > > Perhaps Scott (William) would be better suited to state 'possible type 3' in > his inquiry. > > Anybody want to tell me this uncut stone is not a type 3? ;^) > https://www.facebook.com/media/set/?set=a.2138564189044.2133400.1394318075&type=1 > > gary > > On Jun 6, 2013, at 10:23 PM, Jeff Kuyken <[email protected]> wrote: > >> Totally agreed Rob. As someone who collects primitive chondrites, I can say >> that there are heaps of examples you might think are Type-3 but turn out to >> be 4's. You absolutely need a thin section to tell with 100% certainty. >> >> Cheers, >> >> Jeff >> >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of Rob Matson >> Sent: Friday, 7 June 2013 4:19 PM >> To: 'William Feek'; [email protected] >> Subject: Re: [meteorite-list] WANTED: small unclassified type 3's >> >> Hi William, >> >>> Michael, No need to get all anal about the verbage, this ain't a Supreme >> Court >> hearing. >>> I guess I could have inserted the word "possible", maybe even used the >> word >> "potential", >>> but thankfully there's reasonable people who've displayed the capability >> of >> understanding >>> what I was getting at without the use of crystal clear lawyer speak such >> as >> what's written >>> in a software User Agreement. Go ahead and critique every line and word >> that I >> wrote, >>> I'll be the first to agree that it's probably wrought with problems, but >> I'm >> not going to >>> rewrite it, nor am I going to take draft's of future documents to the >> english >> department >>> of the nearest college for correction before posting. >> >> You're being overly reactionary in your reply to Michael. He raised a >> perfectly >> valid >> point: there is absolutely no way you can determine with confidence that an >> uncut >> meteorite (especially from NWA) is unequilibrated (type-3). >> >>> By the way, I can tell the difference between a Murchison and NWA 2086, >> and >> would >>> you beleive I can do so without the use of analysis. >> >> That is a completely different matter. >> >>> Similarly, there just so happens to be the existence of some stones which >> can >> be >>> determined to be type 3 without the use of analysis ... >> >> No -- not "similarly." William, you need to be disabused of this notion, >> unless >> your >> "some stones" is extremely restrictive. >> >>> ... so you mean to tell me that you'd have trouble being able to tell if a >> stone >>> such as Begga was a type 3 or not without the use of analysis? >> >> YES, ABSOLUTELY, if that stone is uncut. No meteoriticist would ever claim >> an >> uncut stone was unequilibrated without seeing a thin section. >> >> Cheers, >> Rob >> >> >> ______________________________________________ >> >> Visit the Archives at http://www.meteorite-list-archives.com >> Meteorite-list mailing list >> [email protected] >> http://six.pairlist.net/mailman/listinfo/meteorite-list >> >> >> ______________________________________________ >> >> Visit the Archives at http://www.meteorite-list-archives.com >> Meteorite-list mailing list >> [email protected] >> http://six.pairlist.net/mailman/listinfo/meteorite-list > > > Gary Fujihara > Big Kahuna Meteorites Inc. > PO Box 4175, Hilo, HI 96720 > (808) 640-9161 > http://bigkahuna-meteorites.com/ > http://www.ebay.com/sch/fujmon/m.html > ______________________________________________ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
