Re: [meteorite-list] Magnetic meteorites
En un mensaje con fecha 01/19/2005 6:49:39 PM Mexico Standard Time, [EMAIL PROTECTED] escribe: Have you seen a meteorite that attracts some other form of metal? Bob, They are definitely the most magnetic rocks in our universe. Hope this sheds light on some of the other forms you are after: most meteorites attract magnets, gold, silver, brass, copper, zinc, bills, and electronic moneys, credit cards, paypals, money burning holes in pockets, reporters, students, scientists, sky gazers, lovers (at Monze time!), birthday boys and girls, gift givers, Dads (and Moms), kids, folks, curiosity seekers, collectors, entrepreneurs, aventure seekers, hunters and providers, braggarts, dogs, German and Canadian cats, space fans, auctioneers, anomalous friends, gamblers, speculators, maniacs and fools alike. It is that universal attraction that makes them so special...Doug (typed oh so proudly from The United Mexican States). Bob Evans kindly quizzed: Sorry Little Dougie, But here in the states Magnetic means having magnetic properties . I think they're implying that the material attracts iron. Have you seen a meteorite that attracts some other form of metal? Please enlighten me, my friend south of the border BE __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Re: Magnetization
En un mensaje con fecha 01/19/2005 6:28:04 PM Mexico Standard Time, [EMAIL PROTECTED] escribe: Thanks to doug for setting me right,and no thanks for bob Hi Steve, Tom P, John B, JKG, DF, Thanks friends much for the nice comments and humor on this suffering old horse. Somehow I regret making the meteorefrigerator magnet comment, as I am imagining hot dog style vendors at the People's Auction not only selling meteorite coins, but now an assortment of magnetized meteorites:) Pandora's Box is open. Luckily by heating to a bit above 100 degrees C, they lose their magnetization quickly. So best to magnetize after etching and drying. These magnetized meteorites really ought to appeal to the mystic crystal crowd, good luck John, and for commercial production the trade secret is...to use a well wound electromagnet:)...Saludos, Doug __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
RE: [meteorite-list] Tips on etching?
Hi Bob, There are various mixtures people have suggested. But I have has success with 1 pint of alcohol to a couple of table spoons of caustic. it takes a bit of time for the caustic (sodium hydroxide) to dissolve, but eventually it does. To be honest I don't think it matters exactly how much you use, there is probably an ideal ratio but I just chuck a couple of spoons in and scale the amount (according to the size of iron). If your stabilizing an already rusty iron, then you need to remove the rust first with a brush, and soak for a few weeks at least, changing the mixture when it gets brown. Bucket chemistry but I have campos which are now not rusting that were rusting like bastads before treatments so I can only assume it works! Best Mark -Original Message- From: bob cucchiara [mailto:[EMAIL PROTECTED] Sent: Thursday, January 20, 2005 9:22 AM To: mark ford Subject: Re: [meteorite-list] Tips on etching? Hi Mark, Could you give me the procedure and formula of how much alcohol to how much caustic soda for soaking bigger irons. I got this from you a while back but cant seem to locate the info. It would be much apprieciated. Thanks Bob C. - Original Message - From: mark ford [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Thursday, January 20, 2005 1:03 AM Subject: RE: [meteorite-list] Tips on etching? Darren, I would use 'Ferric Chloride' solution (available from electronics stores , as it is used for etching electronic circuit boards). Ferric gives a sharper etch and is way safer than Nitric acid. This is the quick way... 1) Polish the iron slice to a deep shine (preferably like a mirror), wash all traces of metal polish, grease etc off with alcohol or hot soap and water (i.e Just make sure it's got no fingerprints or grease on it). 2) Using a cotton wool pad, wash the face to be etched with the ferric chloride so that it becomes covered in a thin layer of the solution. Keep finger prints off the etched face, wait for a few minutes. 3) Repeat as required until you have a decent looking etch, then wash the iron clean in alcohol or hot soapy water to remove all traces of the ferric chloride. 4) Soak the iron in alcohol mixed with a few tablespoons of sodium hydroxide (caustic soda) this helps slow down rusting, by neutralizing any remaining acid and rust compounds. 5) Dry in a warm place (warm oven but not too hot) for a few hours. 6) When totally dry add a good coating of gun oil while still slightly warm to help prevent rusting. There are other ways to do this but this way works fine for me, its not rocket science... Best Mark Ford -Original Message- From: Darren Garrison [mailto:[EMAIL PROTECTED] Sent: Wednesday, January 19, 2005 11:02 PM To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] Tips on etching? I just bought a few Campo slices and would appreciate any tips on the most effective and safest (both to me and the slices) way of etching them. Would I use the glass-etching gel you can buy at craft stores? The Campo slices I bought are right here: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=6505070004 __ 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
[meteorite-list] Rocks From Space Picture of the Day | January 20, 2005
ROCKS FROM SPACE PICTURE OF THE DAY: http://www.geocities.com/spacerocksinc/January20.html __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] colorado meteorite picture
Hi Steve and List Oddly in Arizona we call those Leaverites . As in Leave er right there !! :o) Are those leaverites AKA colorado iron meteorites worth much ??? How many tons would you like ?? Happy Huntin John Blennert - Original Message - From: Steve Arnold, Chicago!!! [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Wednesday, January 19, 2005 6:22 PM Subject: [meteorite-list] colorado meteorite picture Hi again list.I put up a picture on my homepage of this new specimen before I sanded it down.Let me have your thoughts.It is one big piece of metal. steve arnold, chicago = Steve R.Arnold, Chicago, IL, 60120 I. M. C. A. MEMBER #6728 Illinois Meteorites website url http://stormbringer60120.tripod.com http://members.ebay.com/aboutme/illinoismeteorites/ __ Do you Yahoo!? Yahoo! Mail - 250MB free storage. Do more. Manage less. http://info.mail.yahoo.com/mail_250 __ 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] colorado meteorite picture
Hi All Be careful with the sandpaper or you'll end up with a pile of red dust !! Happy Huntin John Blennert - Original Message - From: Steve Arnold, Chicago!!! [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Wednesday, January 19, 2005 6:22 PM Subject: [meteorite-list] colorado meteorite picture Hi again list.I put up a picture on my homepage of this new specimen before I sanded it down.Let me have your thoughts.It is one big piece of metal. steve arnold, chicago = Steve R.Arnold, Chicago, IL, 60120 I. M. C. A. MEMBER #6728 Illinois Meteorites website url http://stormbringer60120.tripod.com http://members.ebay.com/aboutme/illinoismeteorites/ __ Do you Yahoo!? Yahoo! Mail - 250MB free storage. Do more. Manage less. http://info.mail.yahoo.com/mail_250 __ 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] Hajar al-Aswad/ black stone of Mecca
Anyone know of any decent photos of the supposed meteorite called Hajar al-Aswad that is on the Hajj route? Or know if anyone qualified to judge meteorites has been able to examine it? (I would suspect that if most any of the readers of this list happened to get near it, he would be in risk of an unplanned head-removal surgery). The only photos I've found via Google have been small and poorly shot. __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Iron Meteorite on Mars (Color Photo)
Darren- Your first assumption is the problem. The lens on the Pancam is f/20. Optical theory says that if this lens is perfect, the smallest size spot it can produce at the focal plane (the Airy disk) is 32um in diameter. By sampling at about half that size the sensor will capture all the spatial information present in the image. And indeed, the Pancam sensor has 16um pixels. The lens and the sensor are well matched to each other. Adding more pixels in the same area would not result in pictures of higher resolution, just the requirement for more bandwidth to send them. Of course, a higher resolution camera could be made. But that would require changing the optics as well as the sensor. And in the case of digital imaging like this, it is really only meaningful to talk about resolution in an angular sense, not in terms of the number of pixels. When we look at the image of this Martian meteorite, what we'd all like to see isn't more pixels as such, but more pixels across the meteorite itself. A lot of the one million pixels right now are imaging the area surrounding the meteorite. If the camera had a zoom lens, you could place nearly one million pixels right on the meteorite. That would be many times the resolution of the original image, with the same 1MP sensor. Chris * Chris L Peterson Cloudbait Observatory http://www.cloudbait.com - Original Message - From: Darren Garrison [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Wednesday, January 19, 2005 11:30 PM Subject: Re: [meteorite-list] Iron Meteorite on Mars (Color Photo) I must be misunderstanding something fundamentally here, then. My assumptions are: 1.) the optics are precise enough to focus enough photons on the CCD to provide a sharp image to the CCD cells at the higher pixel density 2.) the CCD cells are able to capture enough photons at the higher pixel density/smaller pixel size to record a meaningful signal. Given those two assumptions (and neglecting for a moment that it may not fit the real-world situation) how can putting a 5 million pixel CCD of the same size as the 1 million pixel CCD in the place of the 1 million pixel CCD NOT collect five times as many points of information for the same image focused on it? Not talking about changing the focal length of the optics, just having a CCD that can sample the same focused optical image in much smaller segments. Are you saying that this would NOT give a better resolution, given the established meaning of image resolution as applies to digital camera image output? If so, I don't understand how. __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] NICE ACHONDRITE SALE
This is pretty. Look just for the photos but you will want some of these: http://www.meteoriteshop.com/sales/janachondritesale.html I am offering a 20% discount from my indicated prices shown on the webpage but if I like you I will probably go to 25% off. This is not classified but look at this photo: http://www.meteoriteshop.com/sales/aa30a.jpg I am going to get in trouble with the self proclaimed meteorite police here (Whose main aim is to convince you that every rock in morocco is not paired with anything and has a TKW of 18 grams and you should get some quick at $1000 a gram as you will never have another opportunity to acquire any and that every rock should not be considered paired with anything unless some scientiest has studied the 47th example from the same strewnfield) but I sold some of this material to a customer as a eucrite who took one look at it and said that it was identical to his NWA2629 remelted howardite (And he was sort of upset with me that I sold him a eucrite that he believes is an howardite instead). This photo that I am showing you at http://www.meteoriteshop.com/sales/aa30a.jpg has a cut surface of classified NWA1929 melted howardite and one of the meteorites from this bunch that he bought from me. (Notice that he used a flash which drowned out some of the picture and I did not use a flash on the website items but it shows them both side by side - think you can figure out which is which?). Anyway, I want to keep the meteorite police happy so I am just selling these rocks as unclassified eucrites that is not known to be classified with anything else and you cant complain if my eucrites turn out to be howardites and a picture is not necessarily worth a thousand words. I might cut one of the rocks up later but going to try and sell them whole first. Remember that you can take a 20% discount from my prices but shipping is extra Cheers DEAN http://www.meteoriteshop.com/sales/janachondritesale.html __ Do you Yahoo!? Yahoo! Mail - 250MB free storage. Do more. Manage less. http://info.mail.yahoo.com/mail_250 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Trade: Canyon Diablo
Hello Everyone, I have 580 grams of Canyon Daiblo meteorites that I had planend to re-sell individually but I don't have time. If anyone has anything to trade, please let me know. I am not very much interesed in anything rare or very unique or unclassified NWA (or most NWA) material. http://www.branchmeteorites.com/misc/cd580.jpg Cash is always fine for trading as well! -Walter __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Iron Meteorite on Mars (Color Photo)
On Thu, 20 Jan 2005 08:25:42 -0700, Chris Peterson [EMAIL PROTECTED] wrote: imaging like this, it is really only meaningful to talk about resolution in an angular sense, not in terms of the number of pixels. When we look at the I think the problem is that we were using two different meanings of the word resolution. For you, the one that matters (and that you were going by) is the one related to the density of information the lens can pick up (trying to avoid using the term resolve). But for me, working mostly with the output end, not the input end, resolution means the number of pixels, period (given, again, that the optics are good enough that the pixels are meaningful). Meaning, when I think of my monitor resolution, I think in the terms of it being 1600x1200, period, not 1600x1200 over a 19 inch diagonal surface. And, again, when I think of the resolution of the output of my camera, I think of it as 2560x1920, peroid, not 2560x1920 over a 2/3 inch CCD (which, at least according to a quick look at one source, is about 5 microns per CCD cell). So when the earlier poster asked about higer resolution photos being available in the context of wanting a large photographic print of the image, IMHO the response that the rover's CCD isn't very high resolution is the proper use of the term resolution as related to the issue of the size of photographic prints-- on the output end, it doesn't matter what the limits of the optics and CCD are-- what matters is that there are not and will not be enough meaningful pixels of information to get a good looking large print. __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Hajar al-Aswad/ black stone of Mecca
Darren list, There may be an indirect means to get a look at a piece of the black stone. Years ago I visited the Suleymaniye Mosque in Istanbul. In the forecourt of the mosque are some tombs. Over the door to the Sultan Suleyman tomb (I think that was the one--), readily accessible, is what is purported to be a piece of the black stone, built into the stonework. I knew essentially nothing about meteorites at the time, but this has always haunted me. If any list members make it to Istanbul, remember this and check it out for us--- Cheers, Norm (http://TektiteSource.com) --- Darren Garrison [EMAIL PROTECTED] wrote: Anyone know of any decent photos of the supposed meteorite called Hajar al-Aswad that is on the Hajj route? Or know if anyone qualified to judge meteorites has been able to examine it? (I would suspect that if most any of the readers of this list happened to get near it, he would be in risk of an unplanned head-removal surgery). The only photos I've found via Google have been small and poorly shot. __ 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] Hajar al-Aswad/Related
Dear List, In Asia, serveral temples house meteorites. In Japan, Niho or Miho and another witnessed fall are housed in temples that are/were built near the fall sites. In China, historically meteorites were thought to be an important sign from the Heavens of events to come or a lucky site for building a Taoist temple (there is still one reported to be housed in a temple). In the Americas, Potter, Nebraska (found by my Great Grandfather;my son was buried with a Potter meteorite and an arrowhead in a bison skin medicine pouch in 1996) was found located next to an Indian campsite on a hilltop; hilltops often are associated with `worship` sites. There are several other examples in the Americas of meteorites being associated with temples or prehistoric sites and burials. I suspect that Mecca was a fall site (but this does not determine if the `Rock` is the real meteorite) as well as Jeruselum, because humans were looking for messages from Heaven. I wouldn`t be surprised if the site of the pyramids in Egypt was also a fall site because man was looking for linking this life with that in the Heavens for the Afterlife. Best Always in LIFE, Dirk Ross...Tokyo __ Do you Yahoo!? Yahoo! Mail - Easier than ever with enhanced search. Learn more. http://info.mail.yahoo.com/mail_250 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] [AD]The Port Orford, Oregon, meteorite mystery
Hi list I just wanted to let you know that the auktion on this, hard to find publication, is ending tomorow. -- The Port Orford, Oregon, meteorite mystery A Smithsonian publication (nr 31) from 1993 Authors are: Part 1: Howard Plotkin Part 2: Vagn F. Buchwald, Roy S. Clarke Jr. 42 pages, with many illustrations. Hand signed by Vagn F. Buchwald -- :-) Lars Pedersen __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Mars Rover's Meteorite Discovery Triggers Questions
http://www.space.com/missionlaunches/mars_meteor_050120.html Mars Rover's Meteorite Discovery Triggers Questions By Leonard David space.com 20 January 2005 The discovery of an iron meteorite sitting on Mars by NASA's Opportunity rover has kick-started a wide-ranging discussion as to what the find may be telling us about the planet itself, past water conditions there, and just how peppered the red planet might be with the fallen objects. Roughly the size of a basketball, the object is mostly made of iron and nickel, and is the first meteorite of any type ever identified on another planet. Now labeled Heat Shield Rock, the meteorite was found at the robot's exploration zone, a huge empty parking lot-like tract of martian real estate called Meridiani Planum. Once scientists here on Earth spotted the odd-looking rock, the Opportunity rover was wheeled into position. The robot was then commanded to utilize a suite of science instruments to survey the meteorite. New line of inquiry How does the finding of the meteorite scale given all the Mars rover science accumulated to date? Finding one meteorite is surprising and interesting, but not by itself what I'd call one of our most important discoveries, responded Steve Squyres of Cornell University in Ithaca, New York and principal investigator for the science instruments on both Opportunity and Spirit, its sister ship also busy at work but on the other side of Mars. The important thing, I think, is that this now opens up a whole new line of inquiry for us, Squyres said, calling attention to several questions, such as: How common are meteorites at Meridiani? What does the concentration of meteorites tell us about erosion rates on the plains? We've seen lots of little rocks on the plains, but with this one exception -- and Bounce Rock -- we've never stopped to look at one, Squyres told SPACE.com. In April of last year, the rover studied Bounce Rock, an odd, football-sized object that Opportunity struck while bouncing to a stop inside protective airbags on landing day over a year ago. Scientists noted at the time that the rock's elemental composition was unlike anything seen on Mars before, with similarities to a meteorite tagged EETA79001 that was found in Antarctica in 1979. So what fraction of the rocks on the plains are meteorites? We haven't really thought much about meteorites until now, but this discovery has really opened our eyes to the question. As we work to answer it, we may learn quite a bit about the long-term history of the plains, Squyres said. Other scientists contacted by SPACE.com offered their thoughts on the meteorite find. The Antarctica experience An iron meteorite being found on Mars would be a truly remarkable discovery, said Carl Agee, Director of the Institute of Meteoritics in the Department of Earth and Planetary Sciences at the University of New Mexico, Albuquerque, New Mexico. Here at the Institute, Agee said, we're always a little skeptical about 'dense black rocks' until some careful examination and analyses have been done. On the other hand, we're finding many meteorites in the deserts of Earth, so why not on Mars? Agee pointed out that running across a meteorite on another planetary body would be a first. No meteorite was ever found on the Moon - even with all the survey work done there by both robots and humans, he said. The fact that a robot found it is even more astounding, since a human walking on Mars would probably be much better at spotting meteorites in a landscape. We know this from the Antarctica experience, Agee explained, pointing to the on-going treks to that part of our planet and the concentrations of meteorites found there. The meteorite flux and the cratering rate on Mars is also a very interesting problem. Perhaps the flux is higher than we thought and thus meteorites are more abundant. This would have an effect on assumed cratering rates which are used to calibrate the martian geologic time scale, Agee said. If this is an iron meteorite found by Opportunity, then it seems to have survived the oxidizing surface environment of Mars by not rusting away yet, Agee noted. This may mean that it has been sitting on the surface for a short length of time, either because it was buried and is now being exposed by erosion or it fell to Mars recently. A fluke..or? Clark Chapman, a planetary scientist at Southwest Research Institute in Boulder, Colorado, said he was very skeptical when first hearing about the meteorite on Mars. On the Earth, after all, even in most favored locations, a lot of people can cover an awful lot of ground before finding a meteorite. While Mars is a less 'active' world than Earth, it has sand dunes and dust storms...a lot going on, Chapman said. And Spirit and Opportunity, amazing though they are, are surveying very small regions very slowly. Chapman said the meteorite finding is a lesson learned. As often happens with theoretical expectations, solid experimental and
[meteorite-list] Meteorites on Mars Paper?
In this article, there is a reference to a paper by Alex Brevan in 2000 about predicting meteorites on Mars. Does anyone know what paper this is? Ron Baalke - http://www.smh.com.au/news/Science/Ah-the-irony--meteorite-found-on-Mars/2005/01/20/1106110882397.html [snip] It does look like an iron meteorite, agreed Alex Bevan, a meteorite scientist at the Western Australian Museum in Perth. Two British scientists published a paper in 2000 predicting small meteorites, weighing 10 to 50 grams, would be relatively common on Mars. However, Dr Bevan said the Martian atmosphere was so thin that one as big as a basketball should have hit the surface at great speed, risking disintegration and blasting out a crater. But the object found by Opportunity appeared to be intact. It's quite remarkable, he said. __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Mars Rover's Meteorite Discovery Triggers Questions
Hi List, I must respectfully disagree with Carl Agee about no meteorite found on the Moon. There were two meteorite specimens found on the lunar surface and he needs to check his history. All my best! --AL Mitterling Carl Agee, Director of the Institute of Meteoritics in the Department of Earth and Planetary Sciences at the University of New Mexico, Albuquerque, New Mexico. Agee pointed out that running across a meteorite on another planetary body would be a first. No meteorite was ever found on the Moon - even with all the survey work done there by both robots and humans, __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Mars Rover's Meteorite Discovery Triggers Questions
Hi All, One error I noticed in this report: http://www.space.com/missionlaunches/mars_meteor_050120.html Agee pointed out that running across a meteorite on another planetary body would be a first. No meteorite was ever found on the Moon - even with all the survey work done there by both robots and humans, he said. I thought two meteorites were found by Apollo astronauts -- Hadley Rille (an EH chondrite) and Bench Crater (CM1). I think there are two paradoxes to be solved with this fairly large iron meteorite. The first is explaining its size in conjunction with its apparent low level of weathering. Presumably a basketball-sized object made of nickel-iron passing through the thin atmosphere of Mars is going to create a crater or bury itself in a pit. How long will it take to exhume such a meteorite under typical Mars weather conditions? A hundred years? A thousand? Tens of thousands? And how much weathering will take place in that time? Perhaps the first thing to compute is the minimum impact velocity, which when coupled with the local surface hardness should give some idea of what happened at the time of impact. If I can find (or someone can provide) standard atmospheric profile data for Mars, I can estimate the minimum impact velocities and ablation percentages for preatmospheric iron meteorites of various masses assuming grazing incidence and an initial cosmic velocity equal to Martian escape velocity. The actual impact velocity for the Heat Shield Rock will certainly be higher, but at least we'll have a ballpark idea of the minimum impact velocity. The second paradox is the meteorite's shape -- is the (current) Martian atmosphere thick enough to produce the deep regmaglypting we see? My intuition is to guess that it isn't. If today's atmosphere couldn't do it, could the pockets have been created by a combination of atmospheric passage and a long period of weathering? If the answer is still no, then the iron must have fallen a very long time ago when the Martian atmosphere was thicker. But if the atmosphere was thicker, then wouldn't the weathering rates have been higher? Perhaps the solution is that the meteorite fell a very long time ago when Mars' atmosphere was thick enough to produce good regmaglpyts, but that the ground was soft enough that the meteorite buried itself, prolonging its lifetime by reducing the weathering rate. Eventually it became exhumed by erosion/deflation, and whatever weathering rind it had acquired over the millenia was quickly (in terms of geologic time) dust-blasted away exposing bare metal in a now very dry atmosphere. --Rob __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Mars Rover's Meteorite Discovery Triggers Questions
Hi List, Hadley Rille (an EH chondrite Apollo 15) and Bench Crater (CM1 Apollo 12). --AL Mitterling Matson, Robert wrote: Hi All, One error I noticed in this report: http://www.space.com/missionlaunches/mars_meteor_050120.html Agee pointed out that running across a meteorite on another planetary body would be a first. No meteorite was ever found on the Moon - even with all the survey work done there by both robots and humans, he said. I thought two meteorites were found by Apollo astronauts -- Hadley Rille (an EH chondrite) and Bench Crater (CM1). __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] NICE ACHONDRITE SALE
Dean, Why don't you just send these in for classification instead of talking about the meteorite-police. Let scientists draw pairing conclusions, laboratories will gladly accept achondrites without any delay in classification. The truth is nobody knows if these are Howardites or Eucrites until tests are performed. Send them in, make them more valuable by making them official. In the long run collectors will be better served. My thoughts, Adam - Original Message - From: dean bessey [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Cc: [EMAIL PROTECTED] Sent: Thursday, January 20, 2005 7:39 AM Subject: [meteorite-list] NICE ACHONDRITE SALE This is pretty. Look just for the photos but you will want some of these: http://www.meteoriteshop.com/sales/janachondritesale.html I am offering a 20% discount from my indicated prices shown on the webpage but if I like you I will probably go to 25% off. This is not classified but look at this photo: http://www.meteoriteshop.com/sales/aa30a.jpg I am going to get in trouble with the self proclaimed meteorite police here (Whose main aim is to convince you that every rock in morocco is not paired with anything and has a TKW of 18 grams and you should get some quick at $1000 a gram as you will never have another opportunity to acquire any and that every rock should not be considered paired with anything unless some scientiest has studied the 47th example from the same strewnfield) but I sold some of this material to a customer as a eucrite who took one look at it and said that it was identical to his NWA2629 remelted howardite (And he was sort of upset with me that I sold him a eucrite that he believes is an howardite instead). This photo that I am showing you at http://www.meteoriteshop.com/sales/aa30a.jpg has a cut surface of classified NWA1929 melted howardite and one of the meteorites from this bunch that he bought from me. (Notice that he used a flash which drowned out some of the picture and I did not use a flash on the website items but it shows them both side by side - think you can figure out which is which?). Anyway, I want to keep the meteorite police happy so I am just selling these rocks as unclassified eucrites that is not known to be classified with anything else and you cant complain if my eucrites turn out to be howardites and a picture is not necessarily worth a thousand words. I might cut one of the rocks up later but going to try and sell them whole first. Remember that you can take a 20% discount from my prices but shipping is extra Cheers DEAN http://www.meteoriteshop.com/sales/janachondritesale.html __ Do you Yahoo!? Yahoo! Mail - 250MB free storage. Do more. Manage less. http://info.mail.yahoo.com/mail_250 __ 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] Mars Rover's Meteorite Discovery Triggers Questions
Thanks very kindly AL for the elaboration regarding those two meteorites, someone really needs to proof the NASA and in this case Space.com press releases for accuracy I think we all can agree Of course, the new Martian Iron will not qualify for a name until it is properly analyzed and 20 grams is deposited in an acceptable curation facility. Perhaps the latter could be waved if Mars were considered a good installation for maintaining a curated collection, or maybe the Smithsonian actually claims ownership on it now based on the Rover politics. That case would make it part of their collection, I'd say though ownership laws will be interesting. Or maybe Mars will be considered as an extension of the Antarctic:-)... (BLM - Bureaucracy of Luna and Mars). Does anyone have the Martian lat/long of the iron for those with geeky tendencies among us?I would like to have the coordinates to follow up some day. Assuming a Greenwich Meridian exists on Mars, and wondering how far off axis magnetic north. Also does anyone know if Mars has a North star and what it is? Or a South star would do...In the English spirit, perhaps a prime meridian cutting through Beagle 2's landing site? GPS based meteorite hunters need not bother at the moment even if you have nuclear heated batteries...so bring your compasses and lets have some fun:) Saludos, Doug En un mensaje con fecha 01/20/2005 1:09:08 PM Mexico Standard Time, [EMAIL PROTECTED] escribe: Hi List, Hadley Rille (an EH chondrite Apollo 15) and Bench Crater (CM1 Apollo 12). --AL Mitterling Matson, Robert wrote: Hi All, One error I noticed in this report: http://www.space.com/missionlaunches/mars_meteor_050120.html Agee pointed out that running across a meteorite on another planetary body would be a first. No meteorite was ever found on the Moon - even with all the survey work done there by both robots and humans, he said. I thought two meteorites were found by Apollo astronauts -- Hadley Rille (an EH chondrite) and Bench Crater (CM1). __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Uvlade Texas Crater Controversy
List, FYI if you are following this thread. The Uvlade crater area has many volcanic pipes and sinks that can also be an explanation for this feature. This would also explain why no shocked quartz was found in the Rosetta stone. Not enough evidence to prove an impact. Occam`s razor dictates. Dirk Ross..Tokyo __ Do you Yahoo!? Yahoo! Mail - You care about security. So do we. http://promotions.yahoo.com/new_mail __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Mars Rover's Meteorite Discovery Triggers Questions
Hola Rob, I think I actually did this about a year ago on this meteorite list (or meteor obs?). I recall thinking about Cabin Creek at the time, not too far off for comparison now, from what I can see. I recall it was between once and twice the speed of sound at impact, and I recall thinking it was ball-park similar to falling on the peak of Mt. Everest regarding ablation and atmospheric phenomenon...We also discussed at the time the range of sizes of stone and iron meteorites that could successfully survive atmospheric passage. I believe the 1 to 10 meter range was the maximum figure...Saludos., Doug Rob Matson wrote: En un mensaje con fecha 01/20/2005 12:40:55 PM Mexico Standard Time, [EMAIL PROTECTED] escribe: If I can find (or someone can provide) standard atmospheric profile data for Mars, I can estimate the minimum impact velocities and ablation percentages for preatmospheric iron meteorites of various masses assuming grazing incidence and an initial cosmic velocity equal to Martian escape velocity. The actual impact velocity for the Heat Shield Rock will certainly be higher, but at least we'll have a ballpark idea of the minimum impact velocity. __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Mars Rover's Meteorite Discovery Triggers Questions
En un mensaje con fecha 01/20/2005 2:01:37 PM Mexico Standard Time, MexicoDoug escribe: Mt. Everest regarding ablation and atmospheric phenomenon No that can't be right since pressure there is one third an atm on Earth, but I do recall we considered Martian surface pressure was about 1% earths and a minor modification to the scale height ought to resurect those calcs...Saludos, DD __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Tucson Party '05 Harvey Awards!
Dear Friends and Listees: Steve Arnold IMB and Geoff Notkin cordially invite you to attend: *** THE SIXTH ANNUAL METEOR MAYHEM BIRTHDAY BASH HARVEY AWARDS CEREMONY *** Friday, February 4, 2005 Socializing begins at 8 pm Harvey Awards Presentation at 9 pm -- AT -- The Copper Club Inside The Arizona Plaza Hotel (Formerly the Vagabond Inn) 1601 North Oracle, at Drachman Tucson, Arizona There will be a full cash bar, lots of free parking, merriment, awards, adventurers, roustabouts, rustlers, tall stories and taller drinks, and most of the international meteorite-collecting community gathered together in one place for one night only! What more could you want? Dinner recommendation: Dinner will not be served at the party this year. AAPS invites you to a splendid all-you-can-eat Italian buffet (catered by The Barefoot Contessa), which will be held before the party and immediately next door, at the Mineral Fossil Co-Op at 7pm. Tickets are $15/person and available from the AAPS booth at the InnSuites. More info: http://www.aaps.net DON'T MISS IT + SEE YOU IN TUCSON! Geoff and Steve Photos from previous parties: http://www.paleozoic.org/shows/tucson-2003/pages/geoff-steve.htm http://www.paleozoic.org/shows/tucson-2003/pages/david.htm http://www.paleozoic.org/shows/tucson-2003/pages/darryl-bob.htm http://www.paleozoic.org/tucson/events/e-8.htm http://www.paleozoic.org/tucson/events/e-11.htm http://www.paleozoic.org/tucson/events/e-6.htm __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] colorado meteorite picture
Red Dust!!! Red Dust!!! Holy Moly!! Maybe it's MARTIAM Jerry - Original Message - From: goldmaster [EMAIL PROTECTED] To: Steve Arnold, Chicago!!! [EMAIL PROTECTED]; meteorite-list@meteoritecentral.com Sent: Thursday, January 20, 2005 9:06 AM Subject: Re: [meteorite-list] colorado meteorite picture Hi All Be careful with the sandpaper or you'll end up with a pile of red dust !! Happy Huntin John Blennert - Original Message - From: Steve Arnold, Chicago!!! [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Wednesday, January 19, 2005 6:22 PM Subject: [meteorite-list] colorado meteorite picture Hi again list.I put up a picture on my homepage of this new specimen before I sanded it down.Let me have your thoughts.It is one big piece of metal. steve arnold, chicago = Steve R.Arnold, Chicago, IL, 60120 I. M. C. A. MEMBER #6728 Illinois Meteorites website url http://stormbringer60120.tripod.com http://members.ebay.com/aboutme/illinoismeteorites/ __ Do you Yahoo!? Yahoo! Mail - 250MB free storage. Do more. Manage less. http://info.mail.yahoo.com/mail_250 __ 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] Hajar al-Aswad/Related
Hi Dirk, not to forget the numerous potential meteorites warshipped in temples on places of pilgrimage of the Mediterran ancient world. I repeat myself, one of them, is the stone of Paphos on Cyprus pictured on many ancient coins, recovered and excavated in 1888, getting mouldy for a century in the stock of the National museum in Nikosia, nowadays exhibited at the small archeological museum at the temple site in Kouklia, never proved, a shame: Sanctuary of Aphrodite - PalaiPaphos Museum Kouklia village, 14 km (9 miles) east of Paphos Tel: (06) 432180 Daily: 09:00-17:00 (Summer: 09:00-19:30) Entrance fees: C£0,75 Pictures of the stone: http://www.indigogroup.co.uk/edge/blstone.htm and here http://www.geocities.com/Athens/9854/PageAph.html And I think by myself: Holy Grale, what a strange club must be this Meteoritical Society? Only rock freaks and appointees there, with not a minute whiff of cultural education and concers? Gosh, if I would have to say there something, I would rather spend the next student, who carved assiduously his thin sections during the last semester a one week beach package tour in Cyprus (cost I guess with flight from London depending on season not more than 200$) with the order to take some pictures from this meteorite of most cultural importance, venerated since 3000 years ago and to fix the circumstances for sampling, no matter how high the chances may be, that it is a real meteorite, rather than to blow out the funds for a next annual meeting on top of the Sugar Loaf with banquet in the Rio de Janeiro Yacht Club. Hey, I'm short of money, but I'd like to donate 10Euro to the Met.Soc. for at least once making a phone call to the Kouklia museum!! Martin - Original Message - From: drtanuki [EMAIL PROTECTED] To: Norman Lehrman [EMAIL PROTECTED]; meteorite-list@meteoritecentral.com Sent: Thursday, January 20, 2005 5:27 PM Subject: Re: [meteorite-list] Hajar al-Aswad/Related Dear List, In Asia, serveral temples house meteorites. In Japan, Niho or Miho and another witnessed fall are __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] colorado meteorite picture
Steve, A suggestion. Place the object you are photographing DOWN(steady is a good thing). Place it on a suitable background to provide some contrast (if the object is dark, a piece of white paper works well). Place it where you can focus some(like a lot of!) light on the object if you're unable to shoot outdoors (which is best as long as you eliminate glare). Take many shots(it's digital you can delete the baddies) from several angles(move your feet baby as in playing D on the court(you know Bball) because light can play multiple tricks both good and not so good. And enjoy youself, you only come around once!(no comments from the peanut gallery) Jerry Flaherty - Original Message - From: Steve Arnold, Chicago!!! [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Wednesday, January 19, 2005 8:22 PM Subject: [meteorite-list] colorado meteorite picture Hi again list.I put up a picture on my homepage of this new specimen before I sanded it down.Let me have your thoughts.It is one big piece of metal. steve arnold, chicago = Steve R.Arnold, Chicago, IL, 60120 I. M. C. A. MEMBER #6728 Illinois Meteorites website url http://stormbringer60120.tripod.com http://members.ebay.com/aboutme/illinoismeteorites/ __ Do you Yahoo!? Yahoo! Mail - 250MB free storage. Do more. Manage less. http://info.mail.yahoo.com/mail_250 __ 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] 3d Stereo Image of Iron Meteorite on Mars
Cool Beans Nick! - Original Message - From: Nicholas Gessler [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Thursday, January 20, 2005 1:08 AM Subject: [meteorite-list] 3d Stereo Image of Iron Meteorite on Mars Hello All, I got tired of looking at the black-and-white and color photos of the Martian Meteorite in separate windows. So I brought them together, fiddled with them and created a 3d Stereo image. Great fun!!! Have a look: http://www.sscnet.ucla.edu/geog/gessler/topics/martian-meteorite.htm I also linked to a page on how to create your own 3d cross-eyed and color analglyph stereo pairs. Cheers, Nick __ 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] Iron Meteorite on Mars (Color Photo)
The Other side says.20th Century Fox..prop made in China Jerry - Original Message - From: Sterling K. Webb [EMAIL PROTECTED] To: [EMAIL PROTECTED]; meteorite-list@meteoritecentral.com Sent: Thursday, January 20, 2005 2:57 AM Subject: Re: [meteorite-list] Iron Meteorite on Mars (Color Photo) Hi, Assumption one is wrong. Basically, the PanCam is just about as good a camera as the $19.95 Samsung Digital Point'N'Shoot dangling from the discount store rack. The image is 512x512 by 32 bits deep (I presume) and that's your one megapixel. If everyone chips in for the ticket, I'll borrow my neighbor's 7 megapixel Canon and go take some pictures of it. Heck, I'd even take a picture of the other side of the rock. What does the other side look like anyway? Sterling K. Webb -- Darren Garrison wrote: On Wed, 19 Jan 2005 23:08:45 -0700, Chris Peterson [EMAIL PROTECTED] wrote: Hi Darren- Replacing the Pancam sensor with, say, a 5MP array wouldn't yield better resolution. If the physical size of the sensor were larger, you would have a greater field of view. But even if the sensor had smaller pixels, the resolution wouldn't increase because the simple, three element f/20 lens of the camera has a spot size of 32um, twice the current pixel size. So packing in more pixels would just be empty resolution- there would be no real increase in the amount of information available. A blown up image from this 5MP image would look the same as the image from the 1MP sensor after you resized it to 5MP. In this case, what we'd really like would be the ability of the Pancam to switch in a longer focal length lens. Maybe the next mission! I must be misunderstanding something fundamentally here, then. My assumptions are: 1.) the optics are precise enough to focus enough photons on the CCD to provide a sharp image to the CCD cells at the higher pixel density 2.) the CCD cells are able to capture enough photons at the higher pixel density/smaller pixel size to record a meaningful signal. Given those two assumptions (and neglecting for a moment that it may not fit the real-world situation) how can putting a 5 million pixel CCD of the same size as the 1 million pixel CCD in the place of the 1 million pixel CCD NOT collect five times as many points of information for the same image focused on it? Not talking about changing the focal length of the optics, just having a CCD that can sample the same focused optical image in much smaller segments. Are you saying that this would NOT give a better resolution, given the established meaning of image resolution as applies to digital camera image output? If so, I don't understand how. __ 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] Tucson Party '05 Harvey Awards!
Dr. Ehlmann and I will be there. I am so excited. This will be my first time to attend the Gem Mineral show. I am looking forward to meeting everyone. See you soon! Teresa At 2:03 PM -0700 1/20/05, Notkin wrote: Dear Friends and Listees: Steve Arnold IMB and Geoff Notkin cordially invite you to attend: *** THE SIXTH ANNUAL METEOR MAYHEM BIRTHDAY BASH HARVEY AWARDS CEREMONY *** Friday, February 4, 2005 Socializing begins at 8 pm Harvey Awards Presentation at 9 pm -- AT -- The Copper Club Inside The Arizona Plaza Hotel (Formerly the Vagabond Inn) 1601 North Oracle, at Drachman Tucson, Arizona There will be a full cash bar, lots of free parking, merriment, awards, adventurers, roustabouts, rustlers, tall stories and taller drinks, and most of the international meteorite-collecting community gathered together in one place for one night only! What more could you want? Dinner recommendation: Dinner will not be served at the party this year. AAPS invites you to a splendid all-you-can-eat Italian buffet (catered by The Barefoot Contessa), which will be held before the party and immediately next door, at the Mineral Fossil Co-Op at 7pm. Tickets are $15/person and available from the AAPS booth at the InnSuites. More info: http://www.aaps.net DON'T MISS IT + SEE YOU IN TUCSON! Geoff and Steve Photos from previous parties: http://www.paleozoic.org/shows/tucson-2003/pages/geoff-steve.htm http://www.paleozoic.org/shows/tucson-2003/pages/david.htm http://www.paleozoic.org/shows/tucson-2003/pages/darryl-bob.htm http://www.paleozoic.org/tucson/events/e-8.htm http://www.paleozoic.org/tucson/events/e-11.htm http://www.paleozoic.org/tucson/events/e-6.htm __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list -- Teresa Moss Director, Monnig Meteorite Gallery Texas Christian University Box 298830 Fort Worth, Texas 76129 Phone: 817-257-MARS (6277) FAX: 817-257-7789 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Hajar al-Aswad/Related Archaeology /NWA 267 meteorite coin
Dear Martin and List, I forgot to mention that the best reference for meteorites and prehistory/culture is Cosmic Debris. I received my NWA267 Liberian meteorite coin last week. What a nice coin for meteorite/coin collectors! Great job, Mark Bostick! Two known knives from Shang Dynasty burials were made from iron meteorites (one at the Smithsonian Institution, USA and the other at the ROM, Canada. Also, Miura 2004, Yamaguchi University, found Ni/Fe tools from Yayoi burials in western Japan. My preliminary evidence also indicates that some Chinese coins and Warring States glass beads also contain meteoritic iron/nickel. Early Chinese alchemists experimented with many unusual alloys to gain immortality, and lucky charms for the Emperor. I have also studied Thai/Lao early iron and bronze age tools and slags and have found NO evidence of Ni/Fe. All of my analyses were done with ASEM. Best to all, dirk ross...Tokyo __ 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
Re: [meteorite-list] Meteorite On Mars....Congrats NASA
On Wed, 19 Jan 2005 19:32:13 -0600, MARK BOSTICK [EMAIL PROTECTED] wrote: concentration fairly accurately. Actually this is the second meteorite found on the mission. The first one was the rock that had identical chemical composition to EETA79001. Hey, waitaminute! I just did a search on EETA79001 because none of the other articles on the Heat Sheild iron have mentioned this other meteorite, and EETA79001 is a Martian meteorite! http://www-curator.jsc.nasa.gov/curator/antmet/marsmets/eeta79001/sample.htm Now, unless there is a typo in the specimen number, how can a Martian rock ON MARS be concidered to be a meteorite? (If that's the case, I think I'll eBay a lot of Earth found Earth meteorites). __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteorites on Mars Paper?
In this article, there is a reference to a paper by Alex Brevan in 2000 about predicting meteorites on Mars. Does anyone know what paper this is? Pierre Rochette has found the paper: Meteorite Accumulations on Mars Authors: Bland, P. A.; Smith, T. B. Affiliation: AA(Department of Mineralogy, Natural History Museum, London, United Kingdom), AB(Department of Physics, The Open University, Milton Keynes, United Kingdom) Journal: Icarus, Volume 144, Issue Icarus, pp. 21-26. (Icarus Homepage) Publication Date: 03/2000 Here's the abstract: We have modeled single-body meteoroid atmospheric entry speeds at Mars and the effect of drag and ablation, and identify a narrow range of small masses (10-50 g) that should impact Mars at survivable speeds. The rate of oxidative weathering is much lower than that on Earth, so this small flux of meteorites could give rise to significant accumulations: ca. 5x10^2 to 5x10^5 meteorites greater than 10 g in mass per square kilometer. Given that extremely large numbers of meteorites may be present on Mars, future sample-return missions should consider the real possibility that they may recover meteoritic material. Due to the low weathering rate, meteorites may survive on the surface of Mars for more than 10^9 years, preserving a record of the temporal variability of the meteoroid flux and the compositional evolution of the meteoroid complex. Intact carbonaceous chondrites may also preserve organic compounds from degradation by ultraviolet radiation. Terrestrial meteorites may be present, but would probably be sterile. Ron Baalke __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Mars Rover's Meteorite Discovery Triggers Questions
Hi Ron, Mark and all, The following is from the article Ron posted earlier today: We've seen lots of little rocks on the plains, but with this one exception -- and Bounce Rock -- we've never stopped to look at one, Squyres told SPACE.com. In April of last year, the rover studied Bounce Rock, an odd, football-sized object that Opportunity struck while bouncing to a stop inside protective airbags on landing day over a year ago. Scientists noted at the time that the rock's elemental composition was unlike anything seen on Mars before, with similarities to a meteorite tagged EETA79001 that was found in Antarctica in 1979. This article certainally triggered a question from me as noted in the subject header. Is the author of this article suggesting that Bounce rock might be a meteorite??? EETA79001 is a Basaltic Shergottite so finding a rock on Mars that that has similarities to it shouldn't seem too unusual. At first I thought the author was a bit mixed up but Mark Bostick posted the following quoted from a NASA scientist: Isn't it neat that the MER Opportunity rover found an iron meteorite on Mars. One of the MER team members with the Mossbauer spectrometer instrument works in our research group. He showed me the data and the nickel-iron is a dead ringer for kamacite and they even know the nickel concentration fairly accurately. Actually this is the second meteorite found on the mission. The first one was the rock that had identical chemical composition to EETA79001. Am I missing something here? A bit perplexed, Frank __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteorite On Mars....Congrats NASA
concentration fairly accurately. Actually this is the second meteorite found on the mission. The first one was the rock that had identical chemical composition to EETA79001. Hey, waitaminute! I just did a search on EETA79001 because none of the other articles on the Heat Sheild iron have mentioned this other meteorite, and EETA79001 is a Martian meteorite! Yes, EETA 79001 is a meteorite because it landed on Earth. One of the Mars rovers found a rock named Bounced Rock that had a very close match to EETA 79001. However, Bounced Rockis not a meteorite - it is a native Mars rock. EETA 79001 is a Mars meteorite because it originated from Mars, but was found in the Antarctic. You do have to distinquish between a Mars meteorite, and a meteorite found on Mars. They are not the same thing. The iron meteorite nicknamed Heat Shield Rock is the first confirmed meteorite found on Mars. In summary: EETA 79001 - Mars meteorite found in the Antarctic Bounced Rock - Mars rock Heat Shield Rock - Meteorite found on Mars Ron Baalke __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Meteor Impact Theory Takes a Hit
http://www.wired.com/news/technology/0,1282,66345,00.html?tw=wn_tophead_4 Meteor Impact Theory Takes a Hit By Amit Asaravala Wired News January 20, 2005 The catastrophe that killed off the majority of life on Earth 250 million years ago was not a meteorite impact, but a gradual rise in global temperatures, according to a new study published Thursday on the website of the journal Science. The study is the second in two months to question the validity of the meteorite impact theory, which suggests that a giant asteroid or comet struck the Earth with such force that it led to a massive, global extinction that scientists call the Great Dying. The impact would have been similar to the one that is widely believed to have led to the extinction of the dinosaurs 65 million years ago. But to date, evidence for the dinosaur's demise has far exceeded that for the Great Dying. We all assumed in the scientific community that if one extinction could be caused by an impact, they all could, said Peter Ward, a University of Washington paleontologist and lead author of the new study. I went (to South Africa) specifically to prove that this was caused by an impact and walked out of there thinking that, no, it wasn't. Ward and his fellow researchers traveled to the Karoo Basin in South Africa to examine fossils that have been traced back to the time of the Great Dying, also known as the end-Permian period. Rather than finding that a great number of animals and plants had all died at once, however, the team detected signs of a gradual extinction over nearly 10 million years. Then, a second extinction seems to have started and lasted approximately 5 million years. Such patterns suggest that long-term environmental changes, like global warming and falling oxygen levels, are more to blame than a meteor impact, said Ward. Continuous volcanic eruptions during the end-Permian period could have contributed to these changes by triggering the release of methane that had previously been frozen at the bottom of the ocean, he suggested. Ward added that the team did not find, in the sediment that it examined, the sorts of minerals that are normally associated with meteorite impacts. Those minerals include iridium, which hitches a ride to Earth on asteroids, and shocked quartz, which takes on an altered appearance after a massive impact. The findings -- or lack thereof -- contradict a controversial study published in June 2004 by Science. In that study, University of California at Santa Barbara geologist Luann Becker and several other scientists claimed to have discovered evidence of a giant impact crater off the coast of Australia. The crater could be dated back to the beginning of the Great Dying, they wrote in the study, making it the likely cause of the mass extinction. However, a number of geologists have since questioned the evidence. They've been very broadly criticized, said Paul Renne, director of the Berkeley Geochronology Center. Many of their claims are completely unsupportable. The impact theory received another major blow in December when a team led by geologist Christian Koeberl from the University of Vienna published a paper in the journal Geology showing that samples of end-Permian rock in Western Europe did not contain iridium and shocked quartz. University of Rochester geochemist Robert Poreda, who co-authored the June impact paper with Becker, defended his team's study Wednesday and said that he still supported the impact theory. A lot of things can explain why there was no evidence of shocked quartz, he said. For one, there's not a complete section (of sediment) to analyze at Karoo. In addition, an impact off the coast of Australia would not have struck the appropriate rocks that would lead to the creation of mass quantities of shocked quartz, he said. Plus, an impact by a comet -- not an asteroid -- would probably not have carried iridium with it, he added. Berkeley's Renne, who was not involved in any of the aforementioned studies, agreed that Poreda's arguments are valid. However, he noted that he and many of his colleagues were beginning to have less and less faith in the impact theory. Indeed, Renne's own research supports the idea that the extinction occurred gradually, he said. We've found that the atmosphere was changing, in terms of oxygen levels and in carbon and so on -- all told, these things were probably going on over a million years, he said. And we're beginning to think that the main pulse of extinction occurred over 100,000 years, which is pretty fast in geologic time, but it's not an instant. To resolve the argument, scientists are now turning their attention to fullerenes, tiny balls of carbon that can lock up gases inside. If fullerenes taken from sediment dated back to the beginning of the Great Dying are found to contain gases more commonly found in space than on Earth, the chances are good that a large meteorite struck the planet around the same time. But even this
Re: [meteorite-list] Meteorites on Mars Paper?
WoW!!! I just thought! What if they find an earth rock on Mars that was propelled say by Cickalub's(sorry for spelling) impact or major paleocene impact!! WOW!! Jerry - Original Message - From: Ron Baalke [EMAIL PROTECTED] To: Meteorite Mailing List meteorite-list@meteoritecentral.com Sent: Thursday, January 20, 2005 5:38 PM Subject: Re: [meteorite-list] Meteorites on Mars Paper? In this article, there is a reference to a paper by Alex Brevan in 2000 about predicting meteorites on Mars. Does anyone know what paper this is? Pierre Rochette has found the paper: Meteorite Accumulations on Mars Authors: Bland, P. A.; Smith, T. B. Affiliation: AA(Department of Mineralogy, Natural History Museum, London, United Kingdom), AB(Department of Physics, The Open University, Milton Keynes, United Kingdom) Journal: Icarus, Volume 144, Issue Icarus, pp. 21-26. (Icarus Homepage) Publication Date: 03/2000 Here's the abstract: We have modeled single-body meteoroid atmospheric entry speeds at Mars and the effect of drag and ablation, and identify a narrow range of small masses (10-50 g) that should impact Mars at survivable speeds. The rate of oxidative weathering is much lower than that on Earth, so this small flux of meteorites could give rise to significant accumulations: ca. 5x10^2 to 5x10^5 meteorites greater than 10 g in mass per square kilometer. Given that extremely large numbers of meteorites may be present on Mars, future sample-return missions should consider the real possibility that they may recover meteoritic material. Due to the low weathering rate, meteorites may survive on the surface of Mars for more than 10^9 years, preserving a record of the temporal variability of the meteoroid flux and the compositional evolution of the meteoroid complex. Intact carbonaceous chondrites may also preserve organic compounds from degradation by ultraviolet radiation. Terrestrial meteorites may be present, but would probably be sterile. Ron Baalke __ 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] Meteorite On Mars....Congrats NASA
On Thu, 20 Jan 2005 14:53:29 -0800 (PST), Ron Baalke [EMAIL PROTECTED] wrote: EETA 79001 - Mars meteorite found in the Antarctic Bounced Rock - Mars rock Heat Shield Rock - Meteorite found on Mars EETA 79001 - Mars rock blasted to Earth by meteorite strike on Mars Bounced Rock - rock found _by Opportunity_ that closely matches EETA 79001 Heat Shield Rock - meteorite of unknown but possibly ancient fall also found _by Opportunity_ Speculate wildly. (Like, for instance, the Heat Shield Rock being just a fragment of a much larger ancient fall, strong enough to blast rocks...) __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteor Impact Theory Takes a Hit
On Thu, 20 Jan 2005 14:59:49 -0800 (PST), Ron Baalke [EMAIL PROTECTED] wrote: We all assumed in the scientific community that if one extinction could be caused by an impact, they all could, said Peter Ward, a University of Washington paleontologist and lead author of the new study. I went (to South Africa) specifically to prove that this was caused by an impact and walked out of there thinking that, no, it wasn't. For anyone who's tastes strays into Paleontology, I'd like to strongly reccomend Peter Ward's recent book _Gorgon_, on this very research. __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteor Impact Theory Takes a Hit
These guys won't be happy until one smacks them in the head! - Original Message - From: Ron Baalke [EMAIL PROTECTED] To: Meteorite Mailing List meteorite-list@meteoritecentral.com Sent: Thursday, January 20, 2005 5:59 PM Subject: [meteorite-list] Meteor Impact Theory Takes a Hit http://www.wired.com/news/technology/0,1282,66345,00.html?tw=wn_tophead_4 Meteor Impact Theory Takes a Hit By Amit Asaravala Wired News January 20, 2005 The catastrophe that killed off the majority of life on Earth 250 million years ago was not a meteorite impact, but a gradual rise in global temperatures, according to a new study published Thursday on the website of the journal Science. The study is the second in two months to question the validity of the meteorite impact theory, which suggests that a giant asteroid or comet struck the Earth with such force that it led to a massive, global extinction that scientists call the Great Dying. The impact would have been similar to the one that is widely believed to have led to the extinction of the dinosaurs 65 million years ago. But to date, evidence for the dinosaur's demise has far exceeded that for the Great Dying. We all assumed in the scientific community that if one extinction could be caused by an impact, they all could, said Peter Ward, a University of Washington paleontologist and lead author of the new study. I went (to South Africa) specifically to prove that this was caused by an impact and walked out of there thinking that, no, it wasn't. Ward and his fellow researchers traveled to the Karoo Basin in South Africa to examine fossils that have been traced back to the time of the Great Dying, also known as the end-Permian period. Rather than finding that a great number of animals and plants had all died at once, however, the team detected signs of a gradual extinction over nearly 10 million years. Then, a second extinction seems to have started and lasted approximately 5 million years. Such patterns suggest that long-term environmental changes, like global warming and falling oxygen levels, are more to blame than a meteor impact, said Ward. Continuous volcanic eruptions during the end-Permian period could have contributed to these changes by triggering the release of methane that had previously been frozen at the bottom of the ocean, he suggested. Ward added that the team did not find, in the sediment that it examined, the sorts of minerals that are normally associated with meteorite impacts. Those minerals include iridium, which hitches a ride to Earth on asteroids, and shocked quartz, which takes on an altered appearance after a massive impact. The findings -- or lack thereof -- contradict a controversial study published in June 2004 by Science. In that study, University of California at Santa Barbara geologist Luann Becker and several other scientists claimed to have discovered evidence of a giant impact crater off the coast of Australia. The crater could be dated back to the beginning of the Great Dying, they wrote in the study, making it the likely cause of the mass extinction. However, a number of geologists have since questioned the evidence. They've been very broadly criticized, said Paul Renne, director of the Berkeley Geochronology Center. Many of their claims are completely unsupportable. The impact theory received another major blow in December when a team led by geologist Christian Koeberl from the University of Vienna published a paper in the journal Geology showing that samples of end-Permian rock in Western Europe did not contain iridium and shocked quartz. University of Rochester geochemist Robert Poreda, who co-authored the June impact paper with Becker, defended his team's study Wednesday and said that he still supported the impact theory. A lot of things can explain why there was no evidence of shocked quartz, he said. For one, there's not a complete section (of sediment) to analyze at Karoo. In addition, an impact off the coast of Australia would not have struck the appropriate rocks that would lead to the creation of mass quantities of shocked quartz, he said. Plus, an impact by a comet -- not an asteroid -- would probably not have carried iridium with it, he added. Berkeley's Renne, who was not involved in any of the aforementioned studies, agreed that Poreda's arguments are valid. However, he noted that he and many of his colleagues were beginning to have less and less faith in the impact theory. Indeed, Renne's own research supports the idea that the extinction occurred gradually, he said. We've found that the atmosphere was changing, in terms of oxygen levels and in carbon and so on -- all told, these things were probably going on over a million years, he said. And we're beginning to think that the main pulse of extinction occurred over 100,000 years, which is pretty fast in geologic time, but it's not an instant. To resolve the argument, scientists are now turning their attention to fullerenes, tiny balls of carbon that can lock up
[meteorite-list] collection in a slice - take II
This has absolutly nothing to do with the 'collection in a slice' meteorite - ie NWA 904. i showed these photos to a buddy and it was just a comment he made so I figured I'd post the pic for y'alls viewing pleasure. http://img32.exs.cx/my.php?loc=img32image=collection5dr.jpg this rock has been classified as a LL3.7 but check out these zenoliths: -white arrows point unequilibriated chondritic material that has armoured chondrules (unfortunatly not visable fomr this angle) -blue arrows point to a material that is wholey diffrent from the bulk of the slice, it is EXTREEMLY soft (probably by a few numbers on the mohs scale) and similar larger inclusions in other slices look like an HED -green arrows point to what was described as a possible cm2 inclusion fromt he dealer i got this stuff from - there DO apear to be faint small chondrules in the inclusion. -red arrows point to my favorite feature in this stone - again another unequilibriated chondritic inclusion with a black background and colorfull chondrules. this stuff reminds me of pics of dhofar 535 that i have seen -white arrows point to a light colored inclusion that is largely deviod of chondrules, although a few are visable. I'd say that the stuff is a x6 chonderitic inclusion __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
RE: [meteorite-list] collection in a slice - take II
opps here is the direct link: http://img32.exs.cx/img32/9646/collection5dr.jpg From: stan . [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] collection in a slice - take II Date: Thu, 20 Jan 2005 23:07:38 + This has absolutly nothing to do with the 'collection in a slice' meteorite - ie NWA 904. i showed these photos to a buddy and it was just a comment he made so I figured I'd post the pic for y'alls viewing pleasure. http://img32.exs.cx/my.php?loc=img32image=collection5dr.jpg this rock has been classified as a LL3.7 but check out these zenoliths: -white arrows point unequilibriated chondritic material that has armoured chondrules (unfortunatly not visable fomr this angle) -blue arrows point to a material that is wholey diffrent from the bulk of the slice, it is EXTREEMLY soft (probably by a few numbers on the mohs scale) and similar larger inclusions in other slices look like an HED -green arrows point to what was described as a possible cm2 inclusion fromt he dealer i got this stuff from - there DO apear to be faint small chondrules in the inclusion. -red arrows point to my favorite feature in this stone - again another unequilibriated chondritic inclusion with a black background and colorfull chondrules. this stuff reminds me of pics of dhofar 535 that i have seen -white arrows point to a light colored inclusion that is largely deviod of chondrules, although a few are visable. I'd say that the stuff is a x6 chonderitic inclusion __ 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] colorado meteorite picture HOW TO.
Dear Steve; May I suggest going to ebay.com and checking pictures of rocks at mjwy search word. I usually take 3-6 pictures of every specimen, use specifically colored background cloth to enhance the eye appeal of the specimen, always put in some form of scale, either the cube, or a ruler, or even your hand so there is a comparative scale. I take a lot of pictures of brown rocks, it is usually hard to get them to look really cool so one has to work at it. Michael Casper took great pictures of meteorites. Bad pictures get one no where as bad pictures are worse than no picture at all. Get a table like a folding card table, get your favorite piece of cloth, either a pillow case, a single colored shirt and use the back for the surface, or head over to the wallyworld store for a piece of the yard goods departmentthe time spent in plotting the picture WILL reflect more than just the rock. Use a tripod as often as you can, it allows for a much crisper picture, and blur, even so slight will hinder even the best composed picture. A fine overcast, or sunlight are best, indoor lighting lacks in my book. Light is everything in photography, especially digital. Gerald is correct, it's a digital camera take about 500 pictures and delete all but the best five. Start over and do it again. After about 2,000 pictures (I am serious here) your eye for what the camera sees and what you would like to project to the viewer of the picture, will improve drastically. Hope this helps all who attempt to capture images. Dave F. mjwy Gerald Flaherty wrote: Steve, A suggestion. Place the object you are photographing DOWN(steady is a good thing). Place it on a suitable background to provide some contrast (if the object is dark, a piece of white paper works well). Place it where you can focus some(like a lot of!) light on the object if you're unable to shoot outdoors (which is best as long as you eliminate glare). Take many shots(it's digital you can delete the baddies) from several angles(move your feet baby as in playing D on the court(you know Bball) because light can play multiple tricks both good and not so good. And enjoy youself, you only come around once!(no comments from the peanut gallery) Jerry Flaherty - Original Message - From: Steve Arnold, Chicago!!! [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Wednesday, January 19, 2005 8:22 PM Subject: [meteorite-list] colorado meteorite picture Hi again list.I put up a picture on my homepage of this new specimen before I sanded it down.Let me have your thoughts.It is one big piece of metal. steve arnold, chicago = Steve R.Arnold, Chicago, IL, 60120 I. M. C. A. MEMBER #6728 Illinois Meteorites website url http://stormbringer60120.tripod.com http://members.ebay.com/aboutme/illinoismeteorites/ __ Do you Yahoo!? Yahoo! Mail - 250MB free storage. Do more. Manage less. http://info.mail.yahoo.com/mail_250 __ 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] Iron Meteorite on Mars (Color Photo)
http://www.xenotechresearch.com/truecol1.htm Here is a nice text about color calibration of images from Mars -[ MARCIN CIMALA ]-[ I.M.C.A.#3667 ]- http://www.Meteoryt.net [EMAIL PROTECTED] http://www.PolandMET.com [EMAIL PROTECTED] http://www.Gao-Guenie.com GSM +48(607)535 195 [ Member of Polish Meteoritical Society ] __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] colorado meteorite picture HOW TO.
On Thu, 20 Jan 2005 17:41:44 -0700, David Freeman [EMAIL PROTECTED] wrote: A fine overcast, or sunlight are best, indoor lighting lacks in my book. Light is everything in photography, especially digital. Gerald is correct, it's a digital camera take about 500 pictures and delete all but the best five. Start over and do it again. After about 2,000 pictures (I am serious here) your eye for what the camera sees and what you would like to project to the viewer of the picture, will improve drastically. I'd also like to add to all the above tips-- master manual settings for shutter speed, aperture, and metering. Don't let the camera make what may be a wrong guess for what settings to use. Having a digital camera with everything from auto-everything to manual-everything has taught me everything I know about photography-- and made me realize how crappy my photos from point-and-shoot (film AND digital) days really were. Like others said, take lots and lots and lots of photos with lots and lots and lots of manual settings. It won't take long to get the swing of what works best in each situation (and the camera stores all of this information for the shot within the photo file-- any reasonable modern photo editing software can display this info for you). I don't claim on any level to be a professional photographer, but here's a link to a gallery of some of my favorite photos I have taken. And if I recall correctly, almost none of them resulted from trusting the automatic settings on the camera. http://www.renderosity.com/gallery.ez?ByArtist=YesArtist=cynapse __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Meteor Crater Study Kit by Nininger
Hello Everyone, I received today one of Niningers Meteorite Crater Study Kits. This is the neatest thing and it is in pristine looks-like-it-has- never-been-opened condition. The only date I could find was in the Comet Strikes the Earth book; 1942 and 1969. Does anyone have any info on these? When they were produced? How many? Were they sold at the museum? Any information would be appreciated. -Walter __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteor Impact Theory Takes a Hit
Hi, All these the asteroid didn't do it papers are a good sign. I remember the more than 10 years it took to swing opinion on the Cretacious-ending event. We had all the same but, but, but proposals. We were told that the number of species of dinosaurs had been declining for millions of years --- they were going to die off anyway and that big rock was just a coincidence! Not mentioned in this press release is another study of the Permian extinction that came out this week, claiming that oceanic bacteria poisoned the Earth. This is reminiscent of the prominent dinosaur scholar who insisted all the varieties of Cretaceous life that died off were killed by diseases from allied and migratory species. They just got sick and died and that big rock was just a coincidence! Pitiful. The theory that a species can be extinguished by diseases from its own species has been around for two centuries despite the fact that no one has ever found any evidence of any species extincted by disease, ever. But I must admit I admire the bacteria poisoned the earth theory: a new high in whacky. And vulcanism as a world-ending event has been a favorite catastrophe since the latter XVIIIth century and is always the first and favorite not a rock theory. The only old medieval crap still not popular is The Flood! And what could be more stylishly a la mode than a theory that global warming caused The Great Dying? Obviously, this massive extinction was caused by the inability of amphibians and reptiles to draft a Permian Kyoto Treaty! And why do only we get the cute headline style? Impact Theory Takes A Hit? Why not, Disease Theory Gets Sick, or Volcano Theory Blows Up, or Global Warming Theory Cools Down? My point being: bring on the silliness. We have to get through it, so the sooner the better. And yes, we have to prove an impact. But I remember the long gap between the iridium excess and the discovery of Chixilub during which there was a yah yah you have to prove it paper or review every few months for years and years in response to each new piece of evidence that was not a crater, the propose of which was not reiterate the obvious 500 times but to say in effect I will not believe in your rock until you show it to me. As for the slow progression toward what comes to recognized as a fundamental reality, remember: paradigms, or systems of the worlds as Gallileo called them, do not die; only the individuals who support them. We may naively believe that scientific truth is the same everywhere, but even that is not true. For example, British geologists, and the Australian geologists who were their students, were still resolute about asserting the volcanic origin of the craters of the Moon into the 1980's! (Meanwhile, British astronomers are standing there shaking their heads in dismay.) One of my treasured possessions is an Australian geology text published in 1978 that is absolutely vitriolic in asserting for three chapters that there is no evidence of any impact on the Moon. (The author also denied impact craters on Earth, too.) I love it! Anyway, the old farts die or retire and everyone politely forgets their imbecilities. That's how opinions change. The amazing thing is how long it takes knowledge to percolate through the dried clay of human thought. It's been four centuries since we figured out that comets were in space not the atmosphere, four centuries since we saw the craters on the Moon, two centuries since we admitted that rocks can fall from the sky, two centuries since we discovered the first asteroid, not to mention everything learned in the last 50 years, and still it's Tut, tut, big rock? I don't think so. Pitiful. Sterling K. Webb --- Ron Baalke wrote: http://www.wired.com/news/technology/0,1282,66345,00.html?tw=wn_tophead_4 Meteor Impact Theory Takes a Hit By Amit Asaravala Wired News January 20, 2005 The catastrophe that killed off the majority of life on Earth 250 million years ago was not a meteorite impact, but a gradual rise in global temperatures, according to a new study published Thursday on the website of the journal Science. The study is the second in two months to question the validity of the meteorite impact theory, which suggests that a giant asteroid or comet struck the Earth with such force that it led to a massive, global extinction that scientists call the Great Dying. The impact would have been similar to the one that is widely believed to have led to the extinction of the dinosaurs 65 million years ago. But to date, evidence for the dinosaur's demise has far exceeded that for the Great Dying. We all assumed in the scientific community that if one extinction could be caused by an impact, they all could, said Peter Ward, a University of Washington paleontologist and lead author of the new study. I went (to South Africa) specifically to prove that this was caused
Re: [meteorite-list] Meteor Crater Study Kit by Nininger
Dear Walter, Try that Fred Hall feller' you know, he sells meteorites, I didn't know people could own them ;-) , just ask Fred!!! Fred would know the info on The Comet Strikes The Earth I believe. Best, Dave Freeman Walter Branch wrote: Hello Everyone, I received today one of Niningers Meteorite Crater Study Kits. This is the neatest thing and it is in pristine looks-like-it-has- never-been-opened condition. The only date I could find was in the Comet Strikes the Earth book; 1942 and 1969. Does anyone have any info on these? When they were produced? How many? Were they sold at the museum? Any information would be appreciated. -Walter __ 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] Iron Meteorite on Mars (Color Photo)
On Fri, 21 Jan 2005 01:44:33 +0100, Meteoryt.net [EMAIL PROTECTED] wrote: http://www.xenotechresearch.com/truecol1.htm Here is a nice text about color calibration of images from Mars Hard to believe that something that well written and cogent came from such a complete and utter crackpot. (Just hit the back button on that page to see all of his claims of finding fossils of sea urchins, sand dollars, and trilobites in the rover photos. The guy is 51 cards short of a deck). __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteor Crater Study Kit by Nininger
Hi Walter and list, I have had several of these kits and still have a few. It really is a neat item, containing the booklet A Comet Strikes the Earth along with an oxidized fragment of Canyon Diablo inserted directly into the book; a fragment of the meteorite on an explanatory card; 2 impactites on another card with description; and a little folder with up to 50 of the condensed nickel-iron spherules thought to make up the missing mass of the Canyon Diablo meteorite. All of this is housed in a nice white box labeled Meteorite Crater Study Kit and the address of the American Meteorite Laboratory in Denver. The kits were put together by Nininger and his son-in-law Glenn Huss and were sold at the American Meteorite Laboratory which Huss set up after the museum had been closed. This was about 1960. A few of these have survived in pristine condition, but very few. My best, Thomas --- Walter Branch [EMAIL PROTECTED] wrote: Hello Everyone, I received today one of Niningers Meteorite Crater Study Kits. This is the neatest thing and it is in pristine looks-like-it-has- never-been-opened condition. The only date I could find was in the Comet Strikes the Earth book; 1942 and 1969. Does anyone have any info on these? When they were produced? How many? Were they sold at the museum? Any information would be appreciated. -Walter __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Do you Yahoo!? Yahoo! Mail - Easier than ever with enhanced search. Learn more. http://info.mail.yahoo.com/mail_250 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] AD Delete 9.8 LB BANDED IRON VENTIFACT
Dear List; I was asked by a person about how to buy that ventifacted iron specimen and I had it up at auction and it dropped out on Monday...before anyone could see it. It is relisted now. Search mjwy, and if hard to find, click to my store via the red tag and look under stromatolite and it is there. Dave F. From WY where the high today was a sunny 57 degrees! __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] 3d Stereo Image of Iron Meteorite on Mars
Doesn't the 3-D image look vaguely like a skull? Shades of the everlovin' Face on Mars! Tracy Latimer Hello All, I got tired of looking at the black-and-white and color photos of the Martian Meteorite in separate windows. So I brought them together, fiddled with them and created a 3d Stereo image. Great fun!!! Have a look: http://www.sscnet.ucla.edu/geog/gessler/topics/martian-meteorite.htm I also linked to a page on how to create your own 3d cross-eyed and color analglyph stereo pairs. Cheers, Nick __ 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
