Re: [meteorite-list] Rocks from Space Picture of Day - December 22, 2010
Thanks Pat and Jason, So, from what I gather from your posts and the photo, the silicates melt out before the iron under the heat and pressure of entry and they probably weather out more quickly on the ground. Cool! Happy Holidays, Guido -Original Message- From: Jason Utas meteorite...@gmail.com Sent: Dec 21, 2010 10:47 PM To: Count Deiro countde...@earthlink.net, Meteorite-list meteorite-list@meteoritecentral.com Subject: Re: [meteorite-list] Rocks from Space Picture of Day - December 22, 2010 Hello Count, Mundrabilla looks like so when cut: http://upload.wikimedia.org/wikipedia/commons/6/65/Mundrabilla_meteorite_NMNH_slice.jpg It's a coral-like intergrowth of Fe-Ni and troilite. They would probably have looked spectacular when found, but sadly their current surface morphology is due to the fact that troilite weathers more quickly than iron. The inclusions weather away or weather out of the iron framework leaving a spongelike structure behind. There are two similar meteorites; Waterville and Buffalo Gap are in the same IAB grouplet, and all three have high concentrations of troilite. There are also a few others like Georgetown that are structurally similar, but I believe chemically unrelated. Regards, Jason On Tue, Dec 21, 2010 at 10:37 PM, Count Deiro countde...@earthlink.net wrote: Hi Mike and List, Thanks for putting the Mundrabilla example up for tonight's show. Super shot. Great meteorite. I notice that the exterior of this iron has hundreds of closely spaced similar sized vug like holes. Is this an entry artifact, or maybe terrestial weathering? Would someone care to explain the holes? Guido -Original Message- From: Michael Johnson mich...@rocksfromspace.org Sent: Dec 21, 2010 9:47 PM To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] Rocks from Space Picture of Day - December 22, 2010 http://www.rocksfromspace.org/December_22_2010.html __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Rocks from Space Picture of Day - December 22, 2010
Count, list, the answer to your question you can find on Jeff Kuyken's excellent website 'meteoritesaustralia': http://www.meteorites.com.au/oddsends/mundrabilla.html Cheers Werner Schroer - Original Message - From: Count Deiro countde...@earthlink.net To: Michael Johnson mich...@rocksfromspace.org; meteorite-list@meteoritecentral.com Sent: Wednesday, December 22, 2010 5:07 PM Subject: Re: [meteorite-list] Rocks from Space Picture of Day - December 22, 2010 Hi Mike and List, Thanks for putting the Mundrabilla example up for tonight's show. Super shot. Great meteorite. I notice that the exterior of this iron has hundreds of closely spaced similar sized vug like holes. Is this an entry artifact, or maybe terrestial weathering? Would someone care to explain the holes? Guido -Original Message- From: Michael Johnson mich...@rocksfromspace.org Sent: Dec 21, 2010 9:47 PM To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] Rocks from Space Picture of Day - December 22, 2010 http://www.rocksfromspace.org/December_22_2010.html __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Rocks from Space Picture of Day - December 22, 2010
Thank you, Bernd and Happy Holidays! Guido -Original Message- From: bernd.pa...@paulinet.de Sent: Dec 22, 2010 3:14 AM To: Meteorite-list@meteoritecentral.com Subject: [meteorite-list] Rocks from Space Picture of Day - December 22, 2010 Hello Count, Jason, List, Buchwald V.F. (1975) Handbook of Iron Meteorites, Volume 3, p. 862: Primary aggregates of inch-sized taenite crystals, separated by troilite melts, are apparently not at all rare but may occur within many groups of iron meteorites. Outstanding examples are N'Goureyma, San Christobal, Barranca, Blanca, Waterville, Soroti, Santa Catharina, Twin City, and Mundrabilla. There are, however, strong indications that these primitive structures mainly occur within the anomalous meteorites ... The polycrystalline metal-sulfide mixtures seem to indicate that the material was produced by compression and a homogenizing sintering from the components and that this initial process was followed by a high temperature grain growth process. Best pre-Xmas wishes from Germany, Bernd P.S.: Hello Werner and Sandra. This is probably the best shot of this Mundrabilla mass we've ever had the pleasure to see! http://www.rocksfromspace.org/December_22_2010.html __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Rocks from Space Picture of Day - December 22, 2010
Werner, Jeff K. and others, Thank you all for the comments and references about the L/M of Mundrabilla. Interestingly, there isn't a consensus on List as to the primary process that formed the ablation/holes/vugs/weathering. Of course, this is the List :0) Count Deiro IMCA 3536 -Original Message- From: WS Schroer schr...@bigpond.com Sent: Dec 21, 2010 10:57 PM To: Meteorite List meteorite-list@meteoritecentral.com Subject: Re: [meteorite-list] Rocks from Space Picture of Day - December 22, 2010 Count, list, the answer to your question you can find on Jeff Kuyken's excellent website 'meteoritesaustralia': http://www.meteorites.com.au/oddsends/mundrabilla.html Cheers Werner Schroer - Original Message - From: Count Deiro countde...@earthlink.net To: Michael Johnson mich...@rocksfromspace.org; meteorite-list@meteoritecentral.com Sent: Wednesday, December 22, 2010 5:07 PM Subject: Re: [meteorite-list] Rocks from Space Picture of Day - December 22, 2010 Hi Mike and List, Thanks for putting the Mundrabilla example up for tonight's show. Super shot. Great meteorite. I notice that the exterior of this iron has hundreds of closely spaced similar sized vug like holes. Is this an entry artifact, or maybe terrestial weathering? Would someone care to explain the holes? Guido -Original Message- From: Michael Johnson mich...@rocksfromspace.org Sent: Dec 21, 2010 9:47 PM To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] Rocks from Space Picture of Day - December 22, 2010 http://www.rocksfromspace.org/December_22_2010.html __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Rocks from Space Picture of Day - December 22, 2010
If memory serves Sky Telescope (70's or 80's) had an article with color photos of a a large specimen 'in situ'. Maybe a search on their site or new DVD set might turn up more. Chris. Spratt Victoria, BC __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Rocks from Space Picture of Day - December 22, 2010
Chris wrote: If memory serves Sky Telescope (70's or 80's) had an article with color photos of a a large specimen 'in situ'. Hi Chris and List, Your memory does serve right...well, almost. There was indeed an article in S T, but that was in the February 1967 issue with the largest mass (ca. 12 tons) as a cover photo and there were only black white photos: Wilson R.B., Cooney A.M. (1967) Western Australia's Mundrabilla Meteorite (Sky Tel., Feb. 1967, pp. 72-73). Best wishes, Bernd __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Rocks from Space Picture of Day - December 22, 2010
Told you I was getting old. Thanks for the correction. Chris Spratt (Via my iPhone) __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Rocks from Space Picture of Day - December 22, 2010
Chris, Bernd, List, Ironically, I just purchased this issue a few days ago. Here's the ebay item # 200303419030 . The picture on the cover looks and great I recommend a look see. Sincerely, Larry Atkins IMCA # 1941 Ebay username  alienrockfarm www.poisonivycontrolofmichigan.com -Original Message- From: bernd.pa...@paulinet.de To: Meteorite-list@meteoritecentral.com Sent: Wed, Dec 22, 2010 12:09 pm Subject: [meteorite-list] Rocks from Space Picture of Day - December 22, 2010 Chris wrote: If memory serves Sky Telescope (70's or 80's) had an article with color photos of a a large specimen 'in situ'. Hi Chris and List, Your memory does serve right...well, almost. There was indeed an article in S T, but that was in the February 1967 issue with the largest mass (ca. 12 tons) as a cover photo and there were only black white photos: Wilson R.B., Cooney A.M. (1967) Western Australia's Mundrabilla Meteorite (Sky Tel., Feb. 1967, pp. 72-73). Best wishes, Bernd __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Rocks from Space Picture of Day - December 22, 2010
http://www.rocksfromspace.org/December_22_2010.html __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Rocks from Space Picture of Day - December 22, 2010
I want one! Eric On 12/21/2010 9:47 PM, Michael Johnson wrote: http://www.rocksfromspace.org/December_22_2010.html __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Rocks from Space Picture of Day - December 22, 2010
Hi Mike and List, Thanks for putting the Mundrabilla example up for tonight's show. Super shot. Great meteorite. I notice that the exterior of this iron has hundreds of closely spaced similar sized vug like holes. Is this an entry artifact, or maybe terrestial weathering? Would someone care to explain the holes? Guido -Original Message- From: Michael Johnson mich...@rocksfromspace.org Sent: Dec 21, 2010 9:47 PM To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] Rocks from Space Picture of Day - December 22, 2010 http://www.rocksfromspace.org/December_22_2010.html __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Rocks from Space Picture of Day - December 22, 2010
Hello Count, Mundrabilla looks like so when cut: http://upload.wikimedia.org/wikipedia/commons/6/65/Mundrabilla_meteorite_NMNH_slice.jpg It's a coral-like intergrowth of Fe-Ni and troilite. They would probably have looked spectacular when found, but sadly their current surface morphology is due to the fact that troilite weathers more quickly than iron. The inclusions weather away or weather out of the iron framework leaving a spongelike structure behind. There are two similar meteorites; Waterville and Buffalo Gap are in the same IAB grouplet, and all three have high concentrations of troilite. There are also a few others like Georgetown that are structurally similar, but I believe chemically unrelated. Regards, Jason On Tue, Dec 21, 2010 at 10:37 PM, Count Deiro countde...@earthlink.net wrote: Hi Mike and List, Thanks for putting the Mundrabilla example up for tonight's show. Super shot. Great meteorite. I notice that the exterior of this iron has hundreds of closely spaced similar sized vug like holes. Is this an entry artifact, or maybe terrestial weathering? Would someone care to explain the holes? Guido -Original Message- From: Michael Johnson mich...@rocksfromspace.org Sent: Dec 21, 2010 9:47 PM To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] Rocks from Space Picture of Day - December 22, 2010 http://www.rocksfromspace.org/December_22_2010.html __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
