Hi John, These veins are exactly what I see in a lot of the Dhofars. Thank you very much for your help in identifying what they really are. It makes sense that more of them would be seen in Dhofar chondrites given the generally higher level of weathering in them vs. the NWAs. Best wishes, Bob King
Original Message: ----------------- From: JKGwilliam [EMAIL PROTECTED] Date: Thu, 08 Jun 2006 21:51:08 -0700 To: [EMAIL PROTECTED], [EMAIL PROTECTED], [email protected] Subject: Re: AW: [meteorite-list] Dhofar vs. NWA meteorites Hello List, I believe Phil is correct with his idea that the veining is really weathering artifacts and not actual shock veins. It's hard to tell without seeing some pictures, so, below is a link to two pictures of Sacramento Wash 003, a new Arizona meteorite I found in the Franconia area a couple years back. You can see in the lower picture (close-up) that there is a network of small spider web size veins that ASU confirmed as "weathering artifacts" and not shock veins. Compare these to the specimens in question and see if you notice any simplarities. My regular site, meteoriteimpact.com, is down for a few days so I uploaded the pictures to one of my personal sites. http://www.jkgwilliam.com/SaW003.htm Best, John Gwilliam At 08:10 PM 6/8/2006, Phil Morgan wrote: >Hi Bob, >Are they really shock veins or simply some sort of weathering deposit in >small cracks as they disintegrate into extra-terrestrial soil? > >I don't have any idea how this would work exactly or the substances >involved, but I've always thougth them to be a by-product of weathering >rather than shock. > >Regards to all, >Phil >----- Original Message ----- From: <[EMAIL PROTECTED]> >To: <[email protected]> >Sent: Thursday, June 08, 2006 9:15 AM >Subject: RE: AW: [meteorite-list] Dhofar vs. NWA meteorites > > >Hi Martin, >Thanks for your observations on Dhofar vs. NWA. What you wrote makes sense. >However I still wonder why many of the Dhofar chondrites have so many fine >shock >veins compared to the NWAs. Any thoughts? >Bob > > >Original Message: >----------------- >From: Martin Altmann [EMAIL PROTECTED] >Date: Thu, 8 Jun 2006 14:36:29 +0200 >To: [email protected], [EMAIL PROTECTED] >Subject: AW: [meteorite-list] Dhofar vs. NWA meteorites > > >Hi Bob, > >>So we have two reasons: >The more harsh weathering conditions in Oman >and a economical one, that from the NWA one sees only the tip of the >iceberg's weathering scale, cause the more rotten stuff doesn't sell. > >Buckleboo! >Martin > > >- >Hi all, >I've seen a good number of Dhofar and NWA common chondrites and >I've noticed that there are many among the Dhofars which exhibit highly >weathered interiors laced with rich, thread-like shock veins. These >veins seem to be far less common in NWA chondrites and I wonder >why. Can anyone shed light on this little mystery (for me)? Thank you! >Bob >______________________________________________ >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 > >-------------------------------------------------------------------- >mail2web - Check your email from the web at >http://mail2web.com/ . > > >______________________________________________ >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 -------------------------------------------------------------------- mail2web - Check your email from the web at http://mail2web.com/ . ______________________________________________ Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
