Re: [meteorite-list] Satellite Reentry Witness
Hi All, I too have seen a Soviet satellite (Cosmos 1457) launching-rocket burn its way across the evening Missoula, Montana sky on April 23, 1983. I also saw the great Teton Fireball of August 10, 1972. Oh, and I also saw a UFO while I was at a outdoor Neil Young concert in Aspen, Colorado a couple summers ago. Cheers, Martin On 6/2/06, Larry Lebofsky [EMAIL PROTECTED] wrote: Hi: Make that 2! Sorry for the delayed response, but weeks behind reading all of my email. Long ago, when I was a graduagte student (early 1970s), two of us were driving up Mt. Wilson (north of Pasadena, CA) to observe. We saw something out of the window and actually had time to stop. I loked like a bolide, but was moving relatively slowly. At first we thought it could have been a plane or something. When we got to the top of the mountain, we happened to mention it to some of the other astronomers up there. Ten minutes later, I was live on a local (Loos Angeles) radio station as an expert on things falling from the sky! I had no idea what the heck it was, but given that it was too slow for a bolide (I thought) I took a chance and said that maybe it was a satellite. Sure enough, the next day, the newspaper quoted me, but said that it had been identified by government officials as a Russian booster! At least I got one thing right as a graduate student. Larry Quoting Kevin Fly Hill [EMAIL PROTECTED]: How many on this list have ever seen a satellite reentry? I'd be surprised if the answer is more than one. You might want to start with at least a startled look. March 25, 1988. Big'un -- Discarded Soviet cargo vessel came in over Texas (on it's way to Canada). Wildest thing I've ever seen in the sky. Witnessed by about two hundred people in Tyler, Texas at public gathering. This thing had reports in from all over the country. It was everything that the Space Shuttle was except at night - A major piece with multiple chunks giving off red, green and blue streaks. It moved South to North straight overhead going down to the horizon. I had just turned to wave goodbye to some friends as I was leaving a tour of historic homes -- The McClendon Home, when I spotted the fireball. I began shouting to alert the other folks and we all watched it slowly move off. __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Image of Canadian impact crater
Hello Rob, List That structure is not an impact crater. The structure is located on Sabine Peninsula, Melville Island. The island is largely formed of an erosion platform of folded rocks and the structure you see together with another one located near the shore, a little to northeast are diapirs, not craters. Anyway, the photo is very tricky Best, Andrei - Original Message - From: Matson, Robert [EMAIL PROTECTED] To: Meteorite Mailing List meteorite-list@meteoritecentral.com Sent: Friday, June 02, 2006 10:48 PM Subject: [meteorite-list] Image of Canadian impact crater Hi All, Forwarding this Google image link from the Minor Planet Mailing List (MPML): http://maps.google.com/?ll=76.616667,-109.05spn=0.204709,1.18515t=kom =1 Looks like a very obvious impact crater in northern Canada. Evidently this feature was first spotted by a U.S. Air Force Navigator back in the 1960's using ground mapping radar, but based on the above image I should think it would have been easily spotted in regular aerial photography. Is this feature a known and named impact? --Rob ___ Connex scaneaza automat toate mesajele impotriva virusilor folosind Trend Micro VirusWall. Connex automatically scans all messages for viruses using Trend Micro VirusWall. ___ Nota: Este posibil ca produsul Trend Micro VirusWall sa nu detecteze toti virusii noi sau toate variantele lor. Va rugam sa luati in considerare ca exista un risc de fiecare data cind deschideti fisiere atasate si ca MobiFon nu este responsabila pentru orice prejudiciu cauzat de decizia dvs. Disclaimer: It is possible that the Trend Micro VirusWall product may not be able to detect all new viruses and variants. Please be aware that there is a risk involved whenever opening e-mail attachments to your computer and that MobiFon is not responsible for any damages caused by your decision to do so. __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Need help with a Goldmaster GM2
Hi list! Now I've done it! I have bought a Goldmaster GM3 metal detector, got a metal detector meteorite hunting license... nonono, you don't need a license for meteorite hunting but you need one for using a metal detector in Sweden. I've also downloaded the manual from the net, tested that I can detect one of my worst weathered stony NWA:s in 4-8 inch distance and now I'm off to hunt a H-meteorite field. As I'm a total detector virgin, do you have any tips or tricks to tell me that isn't in the manual? I'll keep you posted of any success. Regards, Göran __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Big Bang in Antarctica - Killer Crater Found UnderIce
Hi Ron, list, are they sure yet? http://adsabs.harvard.edu/abs/1979JGR84.5681B Just curious Stefan - Original Message - From: Ron Baalke [EMAIL PROTECTED] To: Meteorite Mailing List meteorite-list@meteoritecentral.com Sent: Friday, June 02, 2006 6:37 PM Subject: [meteorite-list] Big Bang in Antarctica - Killer Crater Found UnderIce http://researchnews.osu.edu/archive/erthboom.htm BIG BANG IN ANTARCTICA -- KILLER CRATER FOUND UNDER ICE Ohio State Research News June 1, 2006 Ancient mega-catastrophe paved way for the dinosaurs, spawned Australian continent COLUMBUS, Ohio -- Planetary scientists have found evidence of a meteor impact much larger and earlier than the one that killed the dinosaurs -- an impact that they believe caused the biggest mass extinction in Earth's history. The 300-mile-wide crater lies hidden more than a mile beneath the East Antarctic Ice Sheet. And the gravity measurements that reveal its existence suggest that it could date back about 250 million years -- the time of the Permian-Triassic extinction, when almost all animal life on Earth died out. Its size and location -- in the Wilkes Land region of East Antarctica, south of Australia -- also suggest that it could have begun the breakup of the Gondwana supercontinent by creating the tectonic rift that pushed Australia northward. Scientists believe that the Permian-Triassic extinction paved the way for the dinosaurs to rise to prominence. The Wilkes Land crater is more than twice the size of the Chicxulub crater in the Yucatan peninsula, which marks the impact that may have ultimately killed the dinosaurs 65 million years ago. The Chicxulub meteor is thought to have been 6 miles wide, while the Wilkes Land meteor could have been up to 30 miles wide -- four or five times wider. This Wilkes Land impact is much bigger than the impact that killed the dinosaurs, and probably would have caused catastrophic damage at the time, said Ralph von Frese, a professor of geological sciences at Ohio State University. He and Laramie Potts, a postdoctoral researcher in geological sciences, led the team that discovered the crater. They collaborated with other Ohio State and NASA scientists, as well as international partners from Russia and Korea. They reported their preliminary results in a recent poster session at the American Geophysical Union Joint Assembly meeting in Baltimore. The scientists used gravity fluctuations measured by NASA's GRACE satellites to peer beneath Antarctica's icy surface, and found a 200-mile-wide plug of mantle material -- a mass concentration, or mascon in geological parlance -- that had risen up into the Earth's crust. Mascons are the planetary equivalent of a bump on the head. They form where large objects slam into a planet's surface. Upon impact, the denser mantle layer bounces up into the overlying crust, which holds it in place beneath the crater. When the scientists overlaid their gravity image with airborne radar images of the ground beneath the ice, they found the mascon perfectly centered inside a circular ridge some 300 miles wide -- a crater easily large enough to hold the state of Ohio. Taken alone, the ridge structure wouldn't prove anything. But to von Frese, the addition of the mascon means impact. Years of studying similar impacts on the moon have honed his ability to find them. If I saw this same mascon signal on the moon, I'd expect to see a crater around it, he said. And when we looked at the ice-probing airborne radar, there it was. There are at least 20 impact craters this size or larger on the moon, so it is not surprising to find one here, he continued. The active geology of the Earth likely scrubbed its surface clean of many more. He and Potts admitted that such signals are open to interpretation. Even with radar and gravity measurements, scientists are only just beginning to understand what's happening inside the planet. Still, von Frese said that the circumstances of the radar and mascon signals support their interpretation. We compared two completely different data sets taken under different conditions, and they matched up, he said. To estimate when the impact took place, the scientists took a clue from the fact that the mascon is still visible. On the moon, you can look at craters, and the mascons are still there, von Frese said. But on Earth, it's unusual to find mascons, because the planet is geologically active. The interior eventually recovers and the mascon goes away. He cited the very large and much older Vredefort crater in South Africa that must have once had a mascon, but no evidence of it can be seen now. Based on what we know about the geologic history of the region, this Wilkes Land mascon formed recently by geologic standards -- probably about 250 million years ago, he said. In another half a billion years, the Wilkes Land mascon will probably disappear, too. Approximately 100 million years ago, Australia split from the ancient Gondwana
[meteorite-list] Satellite Reentry Witness 3
In late August of '99 I was camping in the Nevada desert. One evening, as twilight turned into darkness, a fireball burned across the sky from horizon to horizon (that's a pretty big distance in the Nv desert!). I caught sight of it at about 1/3 of the way across. It was traveling directly east at a leisurely pace (compared to meteors), leaving a wide, glittering trail of many colors which hung in the air for a moment or three after. The most amazing celestial spectacle I've ever seen, suprising and awesome. I remember finding out that it was a satellite reentry, but don't recall the details. Jeff __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] [ebay] auctions ending in aprox 2 days
a few more odds and ends to make my kid sister earn some money standing in line at the post office. bid high and bid often! a small end cut of billanga, an AWSOME small etched canyon diablo slice with plenty of troilite, graphite and schreibersite, a few AWSOME LL3 pieces and a pair of auctions for the new enstatite metachonderite / so called 'desert aubrite' please scroll past the laser junk, unless of course you want to bid on that too ;) http://search.ebay.com/_W0QQsassZlaserprogramQQhtZ-1QQfrppZ50QQfsopZ1QQfsooZ1QQrdZ0? TIA __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Ad: large one cent ebay sale tonight
I have a solution, buy it from the fairs, have it made into spheres, sell them to Mike for $1/ gram, he retails them for $2/g, everybody's happy. M come Meteorite Meteorites wrote: I have 15 kg. of 869 for $0.10/gram here, but now I am under cut in half for sale in some fairs here in Italy Matteo -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.394 / Virus Database: 268.8.1/355 - Release Date: 6/2/06 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Dear friends, I am back
Hello Alfonso; I also welcome you back.and like doug would like for you to write about the meteorite fall and the details of it within your great nation.You probably have a lot of great tales to tell the many waiting eyes of our list members.I also would like to see pictures of your specimen.Have a good time here and i look forward to your posts. Herman. __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
RE: [meteorite-list] 1.2 t Mundrabilla cut
Nice pic! Your link was a bit corrupt by the time it got here - if anyone else had the same problem, try this link: http://www.rocksonfire.com/Dandy%20Mundrabilla.jpg http://www.rocksonfire.com/Dandy%20Mundrabilla.jpg From: ROCKS ON FIRE [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] 1.2 t Mundrabilla cut Date: Fri, 02 Jun 2006 14:10:12 +1000 Hi, Folks, just thought you might to have a look at the 1.2 t Mundrabilla which was to be cut. Here a link to the newspaper article: http://www.rocksonfire.com/Dandy Mundrabilla.jpg mailbox:///C%7C/Documents%20and%20Settings/Norbert/Application%20Data/Thunderbird/Profiles/0bb3eytg.slt/Mail/mail/Inbox?number=180053625part=1.1.2filename=Dandy%20Mundrabilla.jpg Enjoy! -- Best regards from DOWN-UNDER, Norbert Heike Kammel *ROCKS ON FIRE * IMCA #3420 www.rocksonfire.com http://www.rocksonfire.com __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Big Bang in Antarctica - Killer Crater Found UnderIce
Hiya! The journal Nature reports on the find very skeptically, dragging in the Siberian Traps, the lack of geological deformation in nearby Antarctic mountains, the unproven-ness of Chicxulub (gimme a break), the lack of any applicable dating method, and in general sniffing at the notion like it was a dead fish: http://www.nature.com/news/2006/060529/full/060529-11.html The New Scientist is more reasonably skeptical, and references an earlier article that suggests that giant impacts cause ALL the major outbreaks of mantle plume outflows (like The Traps) by punching through the Earth's crust, thus tying three opposing theories (impacts, basalt floods, and poisonous gases) together as one unified theory, satisfying the biases of nobody and annoying pretty much everybody. Good work, guys. http://www.newscientist.com/article/dn9268-giant-crater-may-lie-under-antarctic-ice.html Nice large map of the crater location (roughly 120E 70S) in this article: http://www.hindu.com/thehindu/holnus/008200606021451.htm The dating IS vague: younger than 400-500 mya (million years ago) and older than 100 mya. Not exactly a smoking gun. But there is the earlier publication of discoveries of excess meteoritic material in Antarctica at the right date (250 mya), which was criticized because they couldn't specify a crater location. And the discovery of buckyballs or fullerenes from around the world with extraterrestrial gas in them at the same date. Sounds to me like a case is being built. Slowly. What bothers me about the topography of the location is that we are shown a single or simple basin that large with no signs that I can see of further rims or arc segments of rims. A 30-mile impactor is going to make a ring basin, not just a hole. Unless it was really only a 10-mile impactor and the 300 mile arc is the outer ring of a ring basin, which would make it only a bit bigger than the Chicxuluber. But the Permian extinction is The Champ; it deserves a Whopper of an impactor. 96% of all marine species went bye-bye. So long to trilobites, farewell to pelycosaurs, blastoids, acanthodians, placoderms, and the ever-popular fusulinid foraminifera. Greatly reduced in variety and numbers were the bryozoans, brachiopods, ammonoids, sharks, bony fish, crinoids, eurypterids, ostracodes, and echinoderms. For about five million years, corals disappeared from the oceans altogether, then returned. If it was tough on sharks, it wasn't an easy time. Personally, the absence of a huge crater does not affect my notion of the likelihood of an impact at 250 mya. 70% of the globe's area is deep ocean, and thanks to the policy of extensive Crustal Renewal instituted by the Zargon Administration billions of years ago, none of the submerged Crust is more than 200 million years old. I hate an ocean cluttered with old run-down unsightly Crust, don't you? You could have had a 60-mile-diameter impactor and a basin 800 miles across at 250 mya, and there wouldn't be a trace today, if it had been in ocean. At 250 mya, the continents were still gathered together in one premiere tourist destination known as Gondwanaland, and the rest of the world was just ocean. Lots and lots of ocean. East Antarctica was out at the southern- most tip of Gondwanaland in fact, so if something hit there, it ALMOST missed land. The fact that whatever it was so greatly affected MARINE species may be a sort of clue, you know. Well, first, there was this tidal wave about ten miles high, and then, right after that the water started to BOIL... For those of us who want to see where our continents came from and where they've been, here's a nice set of dated world maps, at roughly 50 million year intervals, going back to 750 mya and very readable, with present lands keyed in on the old continents. http://www.uwgb.edu/dutchs/platetec/plhist94.htm For those who miss having a 50-kilometer body in potentially Earth-intercepting orbit, you'll have to make do with 1866 Sisyphus, the largest Apollo asteroid, at 10 km, about the size of the Chicxuluber. Unless, as some contend, it was bigger than 10 km. Impact odds on Sisyphus are pretty nil for thousands of years, though. Or you could worry about the NEA with the highest ACTUAL chance of striking the Earth, out of all the thousands of NEA's. That would be 1950 DA, a 1100 meter asteroid, which stands a good shot (33%) at whacking us on March 16, 2880. Mark it on your calendar. Put up some water and canned goods in the basement. A bag of cookies wouldn't hurt. Sterling K. Webb - - Original Message - From: Ron Baalke [EMAIL PROTECTED] To: Meteorite Mailing List meteorite-list@meteoritecentral.com Sent: Friday, June 02, 2006 11:37 AM Subject: [meteorite-list] Big Bang in Antarctica - Killer Crater Found UnderIce http://researchnews.osu.edu/archive/erthboom.htm BIG BANG IN ANTARCTICA -- KILLER CRATER FOUND UNDER ICE Ohio State
[meteorite-list] Tektites and Meteorites of Terrestrial Origin
This one's been niggling at me for a few weeks now and I finally formulated my thoughts in the car today (no radio since i put my car in a ditch upside down a few moths back. My car is my think time) I know during the early days of the space programme, they glued some terrestrial rocks onto the ablative heatshield of a rocket to see what earth rocks would look like after a descent through an atmosphere and although a few of them fell off they did get some results. I've been unable to find anything on these results. Is there somewhere I can find it? Pictures would be nice if they exist. It puzzles me what an object blasted from the earth looks like after re-entry. They can't all look like tektites. Some chunks of rock must make it out relatively intact as the do from Mars and the moon. How do the orbital dynamics work. Can something achieve escape velocity only to come back later? I think there are enough mechanisms in place to allow it. Would anyone even recognise a meteorite of terrestrial origin as a meteorite at all (one presumes not if it was weathered). Considering that there are readily identified meteorites from two other large bodies on earth, I find it hard to believe that there are none from Earth. The higher gravity and thicker atmosphere cannot account for it all, surely. Some Australian tektites are aged at 700,000yrs but are found on much younger surfaces, still fresh and not looking transported. Has anyone ever done a CRE age on these things. It'd be interesting to know how long they'd been up in space. Have they been there a while and fallen back later. (Yes, Moldavites look different from Australites, I know, I'm just asking) Considering the vast multitude of rock types on the earth, the equally fascinating origins of them, I'm hoping someone can tell, difinitively why we don't have a whole load of (or at least a few) achondrites which don't match anything else and have isotopes which label them as terrestrial. This is knowledge for knowlede's sake. I just want to know and I don't care how much detail the answer goes into, I'll work it out. Best regards Rob McCafferty __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Rocks From Space Picture of the Day - June 3, 2006
http://www.spacerocksinc.com/June_3.html __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] nice too...
Fine picture of the huge main mass of Norton County. http://www.project1947.com/gfb/lapaz.htm Darren, Doug - I guess in recoloring the pics, the stone should stay white :-) Buckleboo! Martin __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Big Bang in Antarctica - Killer Crater FoundUnderIce
by punching through the Earth's crust, thus tying three opposing theories (impacts, basalt floods, and poisonous gases) together as one unified theory, - Original Message - From: Sterling K. Webb I've always had this idea tucked in the back of my head. Kinda like a perforated coastline post Pangea. But it's too scarey to dwell on if there's ANY truth in it!!! Jerry Flaherty __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
