[meteorite-list] Meteorite Picture of the Day
Today's Meteorite Picture of the Day: Tissint Contributed by: Wendy Swartz http://www.tucsonmeteorites.com/mpod.asp __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Book on Oriented Meteorites just out
Hello Michael, Just brillant , I look forward to receive my Cafepress copy. Regards Michel Franco aka Kayunwar IMCA 3869 -Message d'origine- De : meteorite-list-boun...@meteoritecentral.com [mailto:meteorite-list-boun...@meteoritecentral.com] De la part de Michael Blood Envoyé : jeudi 24 octobre 2013 00:00 À : Meteorite List Objet : [meteorite-list] Book on Oriented Meteorites just out The new book is just out: ASPECTS OF METEORITE ORIENTATION (Thanks to Jim Tobin for his assistance) CHAPTERS: 1: Definition Of Orientation 2: The Effect Of Orientation On Perceived Value 3: A Proposed Rating System 4: Domed Meteorites 5: Shields 6: Nosecones 7: Teardrops Bullets 8: Flow Lines 9: Lipping 10: Back Side Pooling Bubbling 11: Regmaglypting 12: Unique Shapes Characteristics 13. Flight Markings Vs. Oriented Thanks to the 35 photographers who contributed one to 5 photographs each, added to my own - which are used to illustrate Degrees of various aspects of orientation. This book can be ordered directly from Café Press: http://www.cafepress.com/aspectsofmeteoriteorientation.962142181 If you just want to see the cover: http://michaelbloodmeteorites.com/AspectsOfMeteoriteOrientation.html __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Book on Oriented Meteorites just out
Hello Michael and all, Very much needed. Just ordered my copy. Cordially, Count Deiro IMCA 3536 MetSoc -Original Message- From: Michel FRANCO mich-fra...@wanadoo.fr Sent: Oct 24, 2013 12:32 AM To: 'Michael Blood' mlbl...@cox.net, 'Meteorite List' meteorite-list@meteoritecentral.com Subject: Re: [meteorite-list] Book on Oriented Meteorites just out Hello Michael, Just brillant , I look forward to receive my Cafepress copy. Regards Michel Franco aka Kayunwar IMCA 3869 -Message d'origine- De : meteorite-list-boun...@meteoritecentral.com [mailto:meteorite-list-boun...@meteoritecentral.com] De la part de Michael Blood Envoyé : jeudi 24 octobre 2013 00:00 À : Meteorite List Objet : [meteorite-list] Book on Oriented Meteorites just out The new book is just out: ASPECTS OF METEORITE ORIENTATION (Thanks to Jim Tobin for his assistance) CHAPTERS: 1: Definition Of Orientation 2: The Effect Of Orientation On Perceived Value 3: A Proposed Rating System 4: Domed Meteorites 5: Shields 6: Nosecones 7: Teardrops Bullets 8: Flow Lines 9: Lipping 10: Back Side Pooling Bubbling 11: Regmaglypting 12: Unique Shapes Characteristics 13. Flight Markings Vs. Oriented Thanks to the 35 photographers who contributed one to 5 photographs each, added to my own - which are used to illustrate Degrees of various aspects of orientation. This book can be ordered directly from Café Press: http://www.cafepress.com/aspectsofmeteoriteorientation.962142181 If you just want to see the cover: http://michaelbloodmeteorites.com/AspectsOfMeteoriteOrientation.html __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] hacked email
Dear list, Sorry for inappropriate post Awful trip yesterday, but my email was hacked and someone send this rubbish to all my contacts. Regards, Matija __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Chelyabinsk strewnfield map and trajectory projection - updated final version
Dear all, An updated and final version of the Chelyabinsk strewnfield map and trajectory ground projection is now available at: http://www.meteorite-recon.com/img_inventar/Chelyabinsk_strewnfield_map_7500.jpg For background information see: http://www.meteorite-recon.com/en/Meteorite_Chelyabinsk_6.html In March our calculations gave a window of 200 – 800 kg for the Lake Chebarkul fragment. Our scenario and the resulting map used a conservative value of 300 kg for this mass. Now, after its successful recovery, the determination of its approximate mass (~ 600 kg) enabled us to narrow a few parameters of the trajectory and dark flight. The resulting minor changes in the final map are listed below: - The transverse displacement of the calculated wind shift discounted impact point for the lake mass is reduced from 1.100 m to 950 m. - As a result, the trajectory is slightly displaced to the south, albeit with the map scale used, the change is of no consequence for the depiction - Impact velocity for the lake mass is ~ 550 km/h instead of ~ 500 km/h - The altitude at which the transition into dark flight occurred is ~ 14 km instead of 14.7 km In addition to these changes, within the last two months a total of 34 masses with documented find locations were submitted and successively added to the map. These recently discovered masses range from 0.5 g to 1,440 g. The final version of the strewnfield map now shows 285 find locations of Chelyabinsk meteorites, of which 228 were submitted with their respective weights. Karl and I would like to thank all contributors. Cheers Svend www.meteorite-recon.com __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] hacked email
Matija, I got your email yesterday too and it didn't seem characteristic of you. Good thing I didn't send you money. ;-) -Brien __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Precambrian target rock mystery
Met-list, On the Geologic Map of the silver city 7.5' Quadrangle west-central Montana are described Target Rocks in the Spokane Formation. On the red bedding planes of the Spokane formation are areas of Concentric bleaching around a central grain. Central core red, then black, and finally gray. The circles sometimes come in constellations. According to Dr Martin Bregman the central nodule is high in strontium, rubidium, etc derived from the Grenville Highlands to the east I am thinking an ET origin regarding these targets and throwing out idea for comments. Another geologist suggested the reaction is a type of geo-chromotography but by what? Phillis Hargrave et al lead author of the above paper with the Montana Bureau of Mines and Geology has sent me additional photos to share. The paper should be online. For now I am going to place my sample on unexposed film to see if there is a pattern. Photos of first sample with cross section are from rock sample donated to me by Jim Whipple USGS retired. Thanks to Mike Fiedler for helping me with photos from Google drive. https://docs.google.com/file/d/0B2BQ-W2L0_vaNmMwTG5UV2NTNXc/edit?usp=sharing https://docs.google.com/file/d/0B2BQ-W2L0_vaWW9GaWZ3cC02Z1E/edit?usp=sharing https://docs.google.com/file/d/0B2BQ-W2L0_vab2dTSjF0NUQwTjg/edit?usp=sharing https://drive.google.com/file/d/0B2BQ-W2L0_vaSDVBak83RUlybmc/edit?usp=sharing https://drive.google.com/file/d/0B2BQ-W2L0_vaV2VMNHJDYVloMWs/edit?usp=sharing https://drive.google.com/file/d/0B2BQ-W2L0_vaVC0tWVpvWFZnMW8/edit?usp=sharing Jack Satkoski __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Colorado Fireball 23OCT2013
This meteor was caught on two of our network cameras. Preliminary information is at http://www.cloudbait.com/science/fireball20131023.html Chris *** Chris L Peterson Cloudbait Observatory http://www.cloudbait.com On 10/23/2013 10:26 PM, drtanuki wrote: List, Colorado Fireball 23OCT2013 http://lunarmeteoritehunters.blogspot.com/2013/10/mbiq-detects-colorado-fireball-meteor.html Dirk Ross...Tokyo __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Name An Asteroid Contest
http://spacegeneration.org/index.php/projects/neo-working-group?id=851 Name An Asteroid Contest Space Generation Advisory Council Click here to Name an Asteroid! http://spacegeneration.org/index.php/projects/neo-working-group?id=854 Here is your chance to name an asteroid! SGAC and the NEO PG in collaboration with the Minor Planet Centre (MPC) are excited to offer you the opportunity to name an asteroid! Entering is easy: Send us your entry in 50 words or less how you would like to name an asteroid and why. The naming contest is open to anyone. Submit your entry by November 30 by telling us your name, age, home country and email. Rules for naming are below. There are two age groups: under 18, and over 18. The two winners will be announced around the end of December. Rules The winning entries will be forwarded to the IAU CSBN - the body responsible for naming small bodies within the solar system, like asteroids. The winning entries will go through the same judging process as any other asteroid. The process can take some time (4-6 months) and there is no guarantee that the winning entry will be accepted. If you want your name suggestion to win, it is highly recommended to follow the IAU Guidelines for Naming Asteroids. They include: * 16 characters or less in length preferably one word * pronounceable (in some language) * non-offensive * not too similar to an existing name of a Minor Planet or natural Planetary satellite [http://www.minorplanetcenter.net/iau/lists/MPNames.html]. * names of pet animals are discouraged * names of a purely or principally commercial nature are not allowed. * The names of individuals or events principally known for political or military activities are unsuitable until 100 years after the death of the individual or the occurrence of the event. Contact For more information, please contact: aster...@spacegeneration.org __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Astronauts Point To Next Frontier: Stopping Killer Asteroids
http://www.nbcnews.com/science/astronauts-point-next-frontier-stopping-killer-asteroids-8C11459971 Astronauts point to next frontier: Stopping killer asteroids Alan Boyle NBC News October 24, 2013 For most people, going into outer space would be enough of a claim to fame - but the way astronaut Rusty Schweickart sees it, saving the world from killer asteroids is far more significant. Apollo and Skylab were great experiences for me personally, but my NEO [near-Earth object] work may really save many, many lives ... ultimately, the 77-year-old Schweickart, who flew on Apollo 9 in 1969 and served as backup Skylab commander, said during a NEOShield Tweetup this month. Schweickart and four other astronauts will urge the international community to put two missions high up on the agenda for space spending: a deep-space infrared telescope to detect near-Earth asteroids, and an asteroid-deflecting probe that could set the stage for a planetary defense system. The Sentinel Space Telescope, a project backed by the nonprofit B612 Foundation, may be the best candidate for the deep-space spotter. The foundation says the Sentinel could be launched five years after the go-ahead is given - but that depends on raising enough money to cover the estimated $400 million price tag. Meanwhile, the other mission would shoot a high-tech cannonball at an asteroid to find out what it would take to divert a threatening space rock. NASA's Deep Impact mission tried something like this on a small scale in 2005, and an international consortium is proposing a larger-scale smash-up for a mission called Asteroid Impact and Deflection Assessment, or AIDA. The two-part AIDA probe could be sent to the asteroid Didymos and its companion in 2022, at an estimated cost of $344 million. An alternative approach would be to put up a gravity tractor - a spacecraft that would use gravitational pull to change the course of a potentially deadly asteroid. The astronauts' call to action will come Friday during a panel discussion at the American Museum of Natural History in New York. Joining Schweickart on stage will be former NASA astronauts Tom Jones and Ed Lu, plus Japan's Soichi Noguchi and Romania's Dumitru-Dorin Prunariu. Hayden Planetarium director Neil deGrasse Tyson will moderate the 11 a.m. ET event, which will be webcast via Ustream. http://www.ustream.tv/channel/amnh-live Their timing couldn't be better: This week, the U.N. General Assembly is considering an international plan to deal with potential asteroid threats, and last week, a worldwide hubbub erupted over a potentially threatening space rock known as 2013 TV135. That particular asteroid is nothing to lose sleep over, said Jones, who chairs the Association of Space Explorers' Committee on Near-Earth Objects. Earth's risk of collision with 2013 TV135 in the year 2032 is almost certain to shrink to zero as more observations come in. But someday, humanity will have to figure out how to deflect a killer asteroid - or go the way of the dinosaurs. Schweickart told NBC News that February's spectacular meteor blast over Russia has heightened awareness about the asteroid threat. But he thinks the world might need an even louder wakeup call. My guess is that we'll probably get hit once or twice before there's enough of an incentive for people to say we've got to do something ... and take a risk to eliminate this threat for everybody, he said. The U.N. has a plan That's where the U.N. plan comes in: Experts have proposed setting up an International Asteroid Warning Network, plus a network for coordinating asteroid-related missions by the world's space agencies. The U.N. Committee on the Peaceful Uses of Outer Space would help sort out the political and diplomatic issues associated with actually trying to divert an asteroid, a la Bruce Willis in Armageddon. It is, in some ways, not much ... in that what we now have is a 'skeleton' for international decision making on the impact threat, Schweickart said in an email. But it is now the whole world (via the General Assembly) that has agreed to this! The next step will be to begin putting the nerves and muscle onto that skeleton. Hopefully, in the end, we'll be ready when a serious impact threat emerges. Will that be a bigger story than the Apollo moonshots or the International Space Station? It'd rank right up there, said Ed Lu, a former space station astronaut and Google executive who is now CEO of the B612 Foundation. My work on preventing asteroid impacts clearly has the potential to be the most important work I've ever done (either as a scientist, as a NASA astronaut, or at Google), Lu told NBC News in an email. A friend and former colleague from Google told me that I am likely the only Googler who left because Google wasn't doing something big enough! When it comes to building and flying the B612 Sentinel Mission, I think the question becomes, how can we not do this?
Re: [meteorite-list] Chelyabinsk strewnfield map and trajectory projection - updated final version
Amazing work, Svend! A great example of cooperative work between broadly diverse members of the meteorite community, all for the advancement of science. Bravo! Doug Ross Dear all, An updated and final version of the Chelyabinsk strewnfield map and trajectory ground projection is now available at: http://www.meteorite-recon.com/img_inventar/Chelyabinsk_strewnfield_map_7500.jpg For background information see: http://www.meteorite-recon.com/en/Meteorite_Chelyabinsk_6.html In March our calculations gave a window of 200 ? 800 kg for the Lake Chebarkul fragment. Our scenario and the resulting map used a conservative value of 300 kg for this mass. Now, after its successful recovery, the determination of its approximate mass (~ 600 kg) enabled us to narrow a few parameters of the trajectory and dark flight. The resulting minor changes in the final map are listed below: - The transverse displacement of the calculated wind shift discounted impact point for the lake mass is reduced from 1.100 m to 950 m. - As a result, the trajectory is slightly displaced to the south, albeit with the map scale used, the change is of no consequence for the depiction - Impact velocity for the lake mass is ~ 550 km/h instead of ~ 500 km/h - The altitude at which the transition into dark flight occurred is ~ 14 km instead of 14.7 km In addition to these changes, within the last two months a total of 34 masses with documented find locations were submitted and successively added to the map. These recently discovered masses range from 0.5 g to 1,440 g. The final version of the strewnfield map now shows 285 find locations of Chelyabinsk meteorites, of which 228 were submitted with their respective weights. Karl and I would like to thank all contributors. Cheers Svend www.meteorite-recon.com __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Chelyabinsk strewnfield map and trajectory projection - updated final ve
Doug kindly wrote: Amazing work, Svend! A great example of cooperative work between broadly diverse members of the meteorite community, all for the advancement of science. Bravo! Yep, a resounding bravo and kudos! I am sure that this detailed strewnfield map will help quite a few collectors / scientists locate further specimens of this once in a lifetime celestial beauty! Cheers, Bernd __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Chelyabinsk strewnfield map and trajectory projection - updated final ve
Well said Berndno need to say any more. Graham On Thu, Oct 24, 2013 at 11:43 PM, Bernd V. Pauli bernd.pa...@paulinet.de wrote: Doug kindly wrote: Amazing work, Svend! A great example of cooperative work between broadly diverse members of the meteorite community, all for the advancement of science. Bravo! Yep, a resounding bravo and kudos! I am sure that this detailed strewnfield map will help quite a few collectors / scientists locate further specimens of this once in a lifetime celestial beauty! Cheers, Bernd __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] NE States Morning Meteor 24OCT2013
List, NE States Morning Meteor 24OCT2013 - 21 reports http://lunarmeteoritehunters.blogspot.jp/2013/10/nj-ny-pa-md-va-nc-on-morning-meteor.html Dirk Ross...Tokyo __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] AD- two new achondrites
List- I have just added two new provisional achondrites to my site. Please check them out as I only made a few slices of each. NWA 8048 is a very interesting shock veined dual lithology eucrite with a huge clast: www.tinyurl.com/AJmetcltrNWA8048.I also added NWA 8049, a nice new ureilite which sparkles when rotated (the pictures do not do it justice): www. tinyurl.com/AJmetcltrNWA8048. Thanks for looking, Aras FYI- I will be gone until Monday, so anything purchased will be shipped Tuesday or Wednesday. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] AD- correct link
Sorry! The correct link for the ureilite is here: www.tinyurl.com/AJmetcltrNWA8049 . The eucrite link was correct: www.tinyurl.com/AJmetcltrNWA8048 . Aras __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Chelyabinsk strewnfield map and trajectory projection - updated final ve
Well said Graham...no need to say any more ;-) Dave www.fallingrocks.com -Original Message- From: meteorite-list-boun...@meteoritecentral.com [mailto:meteorite-list-boun...@meteoritecentral.com] On Behalf Of Graham Ensor Sent: Thursday, October 24, 2013 7:15 PM To: Bernd V. Pauli Cc: meteorite list Subject: Re: [meteorite-list] Chelyabinsk strewnfield map and trajectory projection - updated final ve Well said Berndno need to say any more. Graham On Thu, Oct 24, 2013 at 11:43 PM, Bernd V. Pauli bernd.pa...@paulinet.de wrote: Doug kindly wrote: Amazing work, Svend! A great example of cooperative work between broadly diverse members of the meteorite community, all for the advancement of science. Bravo! Yep, a resounding bravo and kudos! I am sure that this detailed strewnfield map will help quite a few collectors / scientists locate further specimens of this once in a lifetime celestial beauty! Cheers, Bernd __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] OT: Actually, way off topic
G'Day List So what would you say, he has a passion for meteorites? Misdirected? Or a theorist? But he just seems to never fade away. https://www.youtube.com/watch?v=Vm1iiYG99ks#t=24 Have a happy end to the day. Hope everyone's Friday is what they want and bring on the weekend Cheers John Cabassi __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Precambrian target rock mystery
Jack wrote in Precambrian target rock mystery at http://www.mail-archive.com/meteorite-list@meteoritecentral.com/msg115243.html I am thinking an ET origin regarding these targets and throwing out idea for comments. and Phillis Hargrave et al lead author of the above paper with the Montana Bureau of Mines and Geology has sent me additional photos to share. The paper should be online. One publication, Hargarve et al. (2011) is online at: http://www.mbmg.mtech.edu/pdf-open-files/mbmg602_SilverCity.pdf Yes, they are interesting and quite curious. Below is specifically what Hargarve et al. (2011) stated about them. YsSpokane Formation – Grayish red, dark greenish red, and purplish red, microlaminated argillite and siltite; contains abundant mud cracks, ripple marks, etc. The Spokane Formation in this quadrangle contains many areas where “target” rocks, areas of concentric bleaching around a central grain, can be found, especially in the hills west of Little Prickly Pear Creek. These bleached circles are sometimes single occurrences and are locally also “constellations” of numerous small circles. The target rocks are the result of radioactive decay. According to Bregman (written comm, 2009 the central nodule is high in strontium, rubidium or any one of a number of radioactive elements derived from the Grenville Highlands way off to the east (?) of the deposition area. The target rocks are usually found in the Spokane which is normally maroon (though there are some relatively thin light green beds throughout). The age of the rocks, about 1.2 (?) billion years old. Enough time for the heat generated by the radioactive decay to cook (bleach) the color out of the Spokane. Because heat radiates out in a sphere from the nodules, the circles are actually spheres (or ellipsoids) sliced by the shale layers. There probably are the same element nodules in the other Belt rocks (Greyson, Empire, etc.), but since their normal color, or weathered color can be not much different than the bleached out portions, they would be veritably invisible. The publication is: Hargrave, P., J. Lonn and M. Bregman, 2011, Geologic Map of the Silver City 7.5' Quadrangle,West-Central Montana. Montana Bureau of Mines and Geology Open-File Report no. MBMG 602. http://www.mbmg.mtech.edu/pdf-open-files/mbmg602_SilverCity.pdf http://www.mbmg.mtech.edu/mbmgcat/public/ListCitation.asp?pub_id=31402; Looking at the literature, the Spokane Formation (formerly Grinnell Formation) has gone through significant metamorphism, diagenetic alteration, and, in places, copper and other mineralization, which will make understanding what created them quite complicated. Jack asked: Another geologist suggested the reaction is a type of geo-chromotography but by what? They remind me of and look a lot like reduction haloes, which are commonly found in redbeds, paleosols, and other strata. Reduction haloes have also been called reduction spheroids, reduction spots, fish eyes, reduction mottling, bleaching haloes, (radioactive) concretions, and (radioactive) nodules. There are various processes by which they have been explained. Some of them are discussed in: Dyck, W., and R. H. McCorkell, 1983, A study of uranium-rich reduction spheroids in sandstones from Pugwash Harbour, Nova Scotia. Canadian Journal of Earth Sciences. vol. 20, no. 11, pp. 1738-1746. http://www.nrcresearchpress.com/doi/abs/10.1139/e83-163 Hofmann, B. A., 1991, Mineralogy and Geochemistry of Reduction Spheroids in Red Beds. Mineralogy and Petrology. vol. 44, pp. 107-124. http://link.springer.com/article/10.1007%2FBF01167103 Hofmann, B., J. P. L. Dearlove, M. Ivanovich, D. A. Lever, D. C. Green, P. Baertschi, and Tj. Peters, 1987, Evidence of Fossil and Recent Diffusive Element Migration in Reduction Haloes from Permian Red-Beds of Northern Switzerland. in B. Come and N. A. Chapman. eds., pp, 217-238, Natural Analogues in Radioactive Waste Disposal. Springer, New York, New York. http://link.springer.com/chapter/10.1007%2F978-94-009-3465-8_21 Kemp, A. J., M. R. Palmer, and K. V. Ragnarsdottir, 1994, The Uranium-Thorium and rare earth element geochemistry of reduced nodules from Budleigh Salterton, Devon. Proceedings of the Ussher Society. vol. 8, pp. 214-218. http://www.ussher.org.uk/journal/90s/1994/documents/Kemp_et_al_1994.pdf Lines, A. W., J. Parnell, and D. J. Mossman, 1996, Reduction spheroids from the Upper Carboniferous Hopewell Group, Dorchester Cape, New Brunswick: notes on geochemistry, mineralogy and genesis. Atlantic Geology. vol. 32, no. 2, pp. 159-172. http://journals.hil.unb.ca/index.php/ag/article/view/2085 http://journals.hil.unb.ca/index.php/ag/article/download/2085/2449 van Panhuys-Sigler, M., N. H. Trewin and J. Still, 1996, Roscoelite associated with reduction spots in Devonian red beds, Gamrie Bay, Banffshire. Scottish Journal of Geology. vol. 32, pp. 127-132.
Re: [meteorite-list] Chelyabinsk strewnfield map and trajectory projection - updated final version
G'Day List I concur with all the statements. Svend, this is totally awesome and a big thank you to all involved in the work done. Cheers John On Thu, Oct 24, 2013 at 8:06 AM, Meteorite-Recon.com i...@niger-meteorite-recon.de wrote: Dear all, An updated and final version of the Chelyabinsk strewnfield map and trajectory ground projection is now available at: http://www.meteorite-recon.com/img_inventar/Chelyabinsk_strewnfield_map_7500.jpg For background information see: http://www.meteorite-recon.com/en/Meteorite_Chelyabinsk_6.html In March our calculations gave a window of 200 – 800 kg for the Lake Chebarkul fragment. Our scenario and the resulting map used a conservative value of 300 kg for this mass. Now, after its successful recovery, the determination of its approximate mass (~ 600 kg) enabled us to narrow a few parameters of the trajectory and dark flight. The resulting minor changes in the final map are listed below: - The transverse displacement of the calculated wind shift discounted impact point for the lake mass is reduced from 1.100 m to 950 m. - As a result, the trajectory is slightly displaced to the south, albeit with the map scale used, the change is of no consequence for the depiction - Impact velocity for the lake mass is ~ 550 km/h instead of ~ 500 km/h - The altitude at which the transition into dark flight occurred is ~ 14 km instead of 14.7 km In addition to these changes, within the last two months a total of 34 masses with documented find locations were submitted and successively added to the map. These recently discovered masses range from 0.5 g to 1,440 g. The final version of the strewnfield map now shows 285 find locations of Chelyabinsk meteorites, of which 228 were submitted with their respective weights. Karl and I would like to thank all contributors. Cheers Svend www.meteorite-recon.com __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] OT: Actually, way off topic
...know that the next artifact you find is more than likely lunar... https://www.youtube.com/watch?v=6SIxgiq4AWQ -Original Message- From: meteorite-list-boun...@meteoritecentral.com [mailto:meteorite-list-boun...@meteoritecentral.com] On Behalf Of John Cabassi Sent: Thursday, October 24, 2013 10:03 PM To: met-list Subject: [meteorite-list] OT: Actually, way off topic G'Day List So what would you say, he has a passion for meteorites? Misdirected? Or a theorist? But he just seems to never fade away. https://www.youtube.com/watch?v=Vm1iiYG99ks#t=24 Have a happy end to the day. Hope everyone's Friday is what they want and bring on the weekend Cheers John Cabassi __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
