[meteorite-list] Park Forest Impact Collection Up for auction
Hello List, I just listed a collection of Park forest fragments from 4 different impacts. This comes in a riker display box that I had built and displayed in my home. This is a good opportunity for all Park Forest enthusiasts to get specimens from 4 well known impacts at one time. The ebay item # is 2188925914 or you can search under seller name - maccers531 Thanks Bob Evans __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] ebay auctions by Comet Meteorite-Shop
Mike, I'll go a step further then John. You can absolutely trust Serge and company. They are also good friends with Al Lang and he speaks highly of them. Since Al is one of the true "good guys" in this hobby, whom I've known for many years, that's good enough for me. I've also dealt with Serge at the Springfield show and, if I"m any judge of character, he's a good man. He's running ebay auctions while he's in the US between shows. Best wishes, Charlie __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] What to watch while waiting for the mars opposition.
Hi list, After seeing Ron Baalke's great list posting articles about the mars opposition, I thought I'd share this nice narrative from NPR about the recent mars occultation: http://www.npr.org/features/feature.php?wfId=1401486 Howard Wu PS Telescope buffs: Don't miss the must see photos Want to chat instantly with your online friends? Get the FREE Yahoo! Messenger
Re: [meteorite-list] ebay auctions by Comet Meteorite-Shop
Mike, Comet Meteorite Shop is a self described "team" of field collectors and sellers of found(by them) and bought meteorite from different countries of Africa and the Middle East. To date I'm assuming they have strictly sold things by email, from their website, and at shows around the world. They are represented at shows in the states by a fellow named Serguei(sp?)or Serg. Not sure of his last name. They have field collected many of the Dhofars, including some beautiful Lunar and SNC material. Serg was just at the Springfield show in Mass. and will be in Denver from what he told me three weeks ago. I would say they are for real and will probably be a sound Ebayer. Their website is easily found under the name stated above. Welcome to the meteorite list, John PS Yes, some of my comments are just jokes and others more serious. > Comet Meteorite-Shop has many interesting ebay auctions running. However, > they have a zero feedback rating. > > I am reluctant to buy from a zero feedback entity. Could any list members > who have dealings with this company advise as to the reputation of same? > > Since I'm a new list member, I'll let any responders decide whether on or off > list is more appropriate. > > Thanks, > > Mike Fowler > Chicago > ebay-Starsandrocks > > > __ > Meteorite-list mailing list > [EMAIL PROTECTED] > http://www.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Mars Odyssey THEMIS Images - August 18-21, 2003
MARS ODYSSEY THEMIS IMAGES August 18-21, 2003 o Koga Crater (Released 18 August 2003) http://themis.la.asu.edu/zoom-20030818a.html o Eroded Surfaces (Released 19 August 2003) http://themis.la.asu.edu/zoom-20030819a.html o Valles Marineris Landforms (Released 20 August 2003) http://themis.la.asu.edu/zoom-20030820a.html o A Suite of Features (Released 21 August 2003) http://themis.la.asu.edu/zoom-20030821a.html All of the THEMIS images are archived here: http://themis.la.asu.edu/latest.html NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena. __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Re: Recent Flash Floods
First, I'd like to point out those areas in which we agree. Essentially, we agree on all points. The main point that we both agree upon is that there will be a "new layer of sediment". I wasn't specific about the coarseness or the sorting of that sediment. And we both agree that it will take years for that layer to deflate and exhume (or "pedoturbate", I really like that term:-) the original rocks (to include the meteorites). That is my concern or interest. And that was the point of my original question. Which lakes have been severely inundated? Which lake beds have been compromised? Which dry lakes will I be wasting my time (for the next few years) if I were searching for meteorites? The minor points that we may disagree upon are of little concern to me. What concerns me more is whether I can CONTINUE to bring home those meteorites. :-) Bob V. [meteorite-list] Re: Recent Flash Floods Paul [EMAIL PROTECTED] Fri, 22 Aug 2003 09:25:55 -0700 (PDT) On Thu, 21 Aug 2003 12:30:11 -0700 (PDT) Robert Verish >This most recent influx of moisture >into the deserts has caused severe >flash-flooding. Up until now, the >"dry" lakes have been overly wet with >standing water, but flash-flooding >has the energy to bring large volumes >of mud and rock with that water, out >into the middle of these playas and >bury any promising surface with a new >layer of sediment. First, the flooding is not going carry any rock of any size into the playa. Any rock, except for pumice, of any size is going to drop out along the edges of the playa lake. Just the finer- grained sediments, i.e. mostly silt and clay will get carried out into the playa. Along the edges of any playa, there might be a substantial accumulation of sediments. However, the actual thickness of accumulation will drastically decrease towards the interior of any lake bed to the point where it can be quite thin. Finally, the deposition of sediment is not altogether a bad thing. Any of the clutter and garbage that has accumulated on the playa lake surfaces because of human activity should be buried, in a some cases just awhile, giving the meteorite hunter a clean surface on which a person can more easily find any meteorite falls after the lake dries out. I qualify my statements with "awhile" because, in some lake beds, the pedoturbation of the lake sediments after the lake bed dries out might cause larger pieces of rock, older meteorites, and human debris to resurface in the next decade or so if they are not too deeply buried. Also, after a lake dries out, wind action can significantly erode and move any silt, clay,or fine sand that might accumulated during these floods and also expose, in time, objects buried outside of the lake margins. Again, in time, some of stuff that was buried by these floods within the lake beds away from its margins will start to resurface in the next few years as wind erodes the new lake sediments and deflates the lake surface. Yours, Paul Baton Rouge, LA __ __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Thank you!
Hello and nice to be back, Firstly I want to thank all of you who gave me sensible possibilities for those mysterious possible meteorites. I have yet to go thru all of the mail to note down what the consensus was, but one thing I did note was that no one said they were not meteoritic - which says a lot about your collective observational skills (how many times has Mo Yousef sent in pics only to dismissed very rapidly!) So, thanks for that! I shall be passing this info onto the very kind donator of these rocks as they are not represented in my collection! Secondly, just done another hospital bout getting my colon de-tumourised (sorry if too much info...) and guess what, heart problems now. 44 years old and fit to be dried, stuffed and sat in a museum somewhere as a representative of the runt of a litter. damn. I would swear harder but there may be young 'uns reading. Everytime I go into hospital I seem to come out sicker than before. So, if I have now responded to your mails in a timely fashion, well, that's why... lovingly yours, dave IMCA #0092 http://homepage.ntlworld.com/entropydave/Keeper2/images/ __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Incoming!
http://www.popsci.com/popsci/aviation/article/0,12543,473545-1,00.html Incoming! The killer-asteroid movies are almost forgotten, but the threat is real and unquantified. Will it fall to hobbyists to save the world? by Gregory Mone Popular Science September 2003 Its name is 1950DA, it's the size of a small mountain, and it's headed for Earth. According to one grim scenario, 1950DA will hit its target-most likely water, since there is more water than land on our planet-and plunge to the seabed in a fraction of a second. When the asteroid meets the ocean floor, it will explode, excavating a crater 11 miles wide. A column of water and debris will shoot a few miles into the sky-to the height of a low-flying jetliner. Then skyscraper-high walls of water will head for shore, eventually breaking in the shallows and flooding the coast. The rest you know, if you saw the weepy 1998 asteroid movie Deep Impact. Worse things may already have happened: One theory credits an 11-kilometer-wide asteroid with roasting dinosaurs alive 65 million years ago. The enormous impact sent debris flying back into space-some of it halfway to the Moon. When the asteroid bits reentered the atmosphere, the heat that was generated flash-baked plant and animal life. (Had that not happened, mind you, we probably wouldn't be here today.) 1950DA is minuscule by comparison, though even a still smaller asteroid could take out an entire city with a direct hit. And make no mistake, there are plenty of space rocks out there; one missed Earth by only 75,000 miles in June 2002-and wasn't spotted until after it had whizzed by. Now for the good news. First, 1950DA is 877 years away and a 300-to-1 long shot for actually striking the planet and doing the damage in the scenario above, which is part of a simulation recently created by planetary scientists Steven Ward and Erik Asphaug of the University of California, Santa Cruz. And although there are more 1950DAs out there-maybe bigger, maybe due to arrive much sooner-the search for potential killer asteroids is at least under way, though sorely underfunded. Furthermore, a small band of scientists, many of them fueled more by passion than by actual government grants, is working on novel methods to deal with asteroids before they get too close to be diverted or destroyed. (The time spans involved give a new definition to advance thinking: As the foldout on the previous pages shows, some diversion operations would require centuries to work.) NASA is more than halfway through a search for asteroids and comets that come within striking distance of Earth-called "near Earth objects," or NEOs-and are wider than a kilometer. Experts calculate that the chance of an object that size hitting Earth in the next century is only one in several thousand, but the result would be global havoc. After astronomers spot an asteroid in their telescopes, they use radar tracking to get a more precise picture of where it's headed, how fast it's moving, and whether its orbit around the Sun will intersect with Earth's orbit. Before 1950DA's predicted encounter with Earth in 2880, the asteroid will swing around the Sun almost 400 times, while Earth will complete 876 orbits. Of the 600-plus large NEOs tracked thus far, only 1950DA poses any threat at all. But at this stage of the search, there are an estimated 400 potential global killers left to find, not to mention over a million hard-to-spot smaller asteroids capable of regional destruction. (A rock that exploded over Tunguska, Siberia, in 1908 leveled a thousand square miles of remote forest; it was a mere 60 meters wide.) Making the tallying work more tricky are a few long-period comets, which only swing by every few hundred years and are much more difficult to track. The search is only the beginning, and as Jay Melosh, a planetary scientist at the University of Arizona points out, "The question is, If we find one with our name on it, can we do anything?" NASA's search effort receives a paltry $3 million per year, just a fraction of the $25 million that NASA earmarked last year to fix the doors on the Kennedy Space Center's vehicle-assembly building. "I'd like to see more money spent," says David Morrison of NASA's Ames Research Center. But as yet, there's no official program either to build or to test asteroid-deflection technologies. If Earth gets whacked by a significant asteroid within the next few centuries, survivors might find themselves marveling that their ancestors, with tools in hand, did little to prevent a cataclysm. The asteroid interception and diversion experts are mostly hobbyists-planetary scientists, astronomers and engineers who think up these strategies on their own time. But the ideas are plentiful: As our gatefold shows, the path from detection to mitigation could include low-thrust engines, solar sails, standoff nuclear explosions and more. Melosh, for example, has been focusing on the use of solar collectors, which could concentrat
[meteorite-list] ebay auctions by Comet Meteorite-Shop
Comet Meteorite-Shop has many interesting ebay auctions running. However, they have a zero feedback rating. I am reluctant to buy from a zero feedback entity. Could any list members who have dealings with this company advise as to the reputation of same? Since I'm a new list member, I'll let any responders decide whether on or off list is more appropriate. Thanks, Mike Fowler Chicago ebay-Starsandrocks __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] NWA 1167 INFO and THIN SECTIONS Sale
I have had a bunch of inquiries regarding NWA1167 over the last few days including from Dr Rubin at UCLA. To confirm, yes, it is my meteorite and I got the name from Jeff Grossman at the met society and NWA1167 is a provisional name that I am responsible for getting. But I have no idea how Rubin got his hands on it. I can only assume one of my buyers sent it to him because it wasnt me. I have sold maybe half of if. I am not sure exactly how much that I have left and it is in a box somewhere but I am not sure exactly where. And I have to go to Hong Kong and South America over the next 3 weeks so most likely I wont get a chance to search for it soon either so right now I dont have any for sale. I do however have 5 really cool thin sections of what I believe will be an LL3.6. It is really cool looking http://www.meteoriteshop.com/aa-1167a.jpg http://www.meteoriteshop.com/aa-1167b.jpg http://www.meteoriteshop.com/aa-1167c.jpg http://www.meteoriteshop.com/aa-1167d.jpg http://www.meteoriteshop.com/aa-1167e.jpg If anybody wants one of these 5 they are $55 each including the shipping. Paypal very much preferred for payment right now. Cheers DEAN __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] How s(low) can it get...
Ron, Steve and others, Things really are at a snails pace on the list these days...so slow that I thought I would pass on my meteorite revelation for the day. Looking at my "Meteorite Calendar" for August, it dawned on me today that the Adamana oriented meteorite owned by Robert Haag should be renamed the Madonna meteorite. ;<) It is also called the Venus stone...h www.meteorman.org/Adamana.htm John __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Re: Recent Flash Floods
On Thu, 21 Aug 2003 12:30:11 -0700 (PDT) Robert Verish >This most recent influx of moisture >into the deserts has caused severe >flash-flooding. Up until now, the >"dry" lakes have been overly wet with >standing water, but flash-flooding >has the energy to bring large volumes >of mud and rock with that water, out >into the middle of these playas and >bury any promising surface with a new >layer of sediment. First, the flooding is not going carry any rock of any size into the playa. Any rock, except for pumice, of any size is going to drop out along the edges of the playa lake. Just the finer- grained sediments, i.e. mostly silt and clay will get carried out into the playa. Along the edges of any playa, there might be a substantial accumulation of sediments. However, the actual thickness of accumulation will drastically decrease towards the interior of any lake bed to the point where it can be quite thin. Finally, the deposition of sediment is not altogether a bad thing. Any of the clutter and garbage that has accumulated on the playa lake surfaces because of human activity should be buried, in a some cases just awhile, giving the meteorite hunter a clean surface on which a person can more easily find any meteorite falls after the lake dries out. I qualify my statements with "awhile" because, in some lake beds, the pedoturbation of the lake sediments after the lake bed dries out might cause larger pieces of rock, older meteorites, and human debris to resurface in the next decade or so if they are not too deeply buried. Also, after a lake dries out, wind action can significantly erode and move any silt, clay,or fine sand that might accumulated during these floods and also expose, in time, objects buried outside of the lake margins. Again, in time, some of stuff that was buried by these floods within the lake beds away from its margins will start to resurface in the next few years as wind erodes the new lake sediments and deflates the lake surface. Yours, Paul Baton Rouge, LA __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] World's Largest Robotic Telescope Ready To Track Near Earth Asteroids
http://www.nearearthobjects.co.uk/news_display.cfm?code=news_intro&itemID=195 World's largest robotic telescope ready to track NEAs NEO Information Centre August 18, 2003 The telescope designed, constructed and commissioned by Telescope Technologies Ltd., a subsidiary company of JMU, observes autonomously from its site on La Palma in the Canary Islands.The Liverpool Telescope's unique capabilities of flexible scheduling and rapid response will put the UK at the forefront of exciting new fields of research in time dependant astrophysics. "This enables us to study such phenomena as supernovae and Gamma Ray Bursts, the biggest explosions in space," said Professor David Carter of the ARI. The telescope's other great strength is its ability to make regular observations of objects that vary over periods from seconds to years. With current astronomical facilities this is very difficult, whereas the new telescope will track newly discovered objects such as comets or Near Earth Asteroids (NEAs), allowing accurate calculations of their paths and potential hazards. The telescope is supported by the Particle Physics and Astronomy Research Council (PPARC), making 40% of the observing time available to astronomers throughout the UK. A further 5% of the time has been donated by JMU to the National Schools' Observatory (NSO) programme. "School children can now work on their own projects alongside professional astronomers," said Dr. Andy Newsam (NSO astronomer). This is the first time regular access has been granted to schools for world-class research telescopes. The telescope is sited at the Observatorio del Roque de los Muchachos which is operated on the island of La Palma by the Instituto de Astrofisica de Canarias. __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Mars Makes Closest Approach In Nearly 60,000 Years
http://planetary.org/html/news/articlearchive/headlines/2003/mars_closest-approach.html Mars Makes Closest Approach In Nearly 60,000 Years By A.J.S. Rayl The Planetary Society 21 August 2003 Mars is shining brightly in the night sky and moving closer to Earth with every passing day. Even the Big Blackout on the east coast was timed pretty well as far as Mars watching goes. "One of the blackout benefits was that New Yorkers were saying that they had time to look at the night sky -- and in particular Mars," reports Lou Friedman, executive director of The Planetary Society (TPS) who managed to get on one of the last flights out of New York last Thursday before the east coast went dark. In fact, next week -- on Wednesday, Aug. 27 -- Mars' orbit will bring it into opposition, lining it up with Earth on the same side of the Sun and moving it in closer to Earth than it has been in 59,619 years. With media outlets around variously reporting that Mars will be closer than it "ever has been," or "in 73,000 years," or "in nearly 60,000 years," or "50,000 years," confusion about the matter of exactly when in the past Mars was closer to Earth than it will be next week has had a lot of people wondering -- just how long ago did Mars come this close, how close is close, and what does it all mean? TPS investigated the matter. Here's what we found: The estimate of 56,619 years ago - put forth last year by scientist Aldo Vitagliano of the University of Naples, Italy -- is now recognized by leading astronomers as the most accurate date, to date, of just how long ago Mars made its last close approach. And, for the record, that last close approach was just a bit closer than Mars will be come next Wednesday. "The previous, closer approach was on September 12 in astronomical year - 57,616 (57,617 BC) . . . at a distance of 55.718 million kilometers [or 34,623 million miles], versus the 55.758 Gm [or 34,648 million miles] of the 2003 opposition, " Vitagliano confirmed for The Planetary Society via email. To arrive at that figure, one may presume to simply add 2003 - where we are now -- to 57,617 BC. But, Vitagliano reminds: "Historical year zero does not exist, and [so] the time difference between 1 BC and 1 AD is one year. The correct number is 59,619." No matter what else you've read or heard, those, it appears, are the numbers you can take to the bank. "I trust Vitagliano's results," offers Myles Standish, a renowned astronomer at JPL. Standish had considered running his own set of calculations to determine Mars last closest approach, but, after communicating with Vitagliano, changed his mind. "Because of my confidence in him and his research, I didn't think it was worth going after," he says. Newtonian mechanics and customized software Vitagliano employed Newtonian mechanics and his own customized computer software to 'do the math.' In a nutshell, the theory behind Newtonian mechanics allows for predicting the positions of planets and celestial bodies by inference from their motion. In other words, if you can determine the motions of the given objects in, say, the solar system, you can calculate where any given planet or celestial body in that solar system was at any point in the past or will be in the future. Past studies have shown that the orbit of the Red Planet has been getting slightly more eccentric, or elongated over the last 35,000 years because of the gravitational effects of the other planets. During this time of eccentricity, Mars' orbit has been taking it in a little closer to the Sun at perihelion [the point at which it closest to the Sun], hence closer to Earth's orbit, and a little farther from the Sun at aphelion [the point at which it is furthest from the Sun]. This eccentricity has had an impact on how close Mars' orbit comes to Earth's orbit. According to Vitagliano, the closest distance between the Earth and Mars orbits was at a minimum 82,000 years ago. The closest distance then increased for the next 45,000 years, but since that time it has been decreasing and will continue to do so for another 25,000 years. As a result, there will be approaches of Mars in the future which are even closer than the one occurring on August 27. For Vitagliano, the task at hand however was to figure out when, exactly, in the past Mars was closer to Earth than it will be at this year's opposition. Using SOLEX, his celestial mechanics software program, on a 800 MHz computer Vitagliano spent just 2 hours and 45 minutes computing time "With the present version of SOLEX and my 1700 MHz notebook," he notes, "it now takes about one hour." But Vitagliano is making it sound way too easy. When pressed, he admits that the creation of the SOLEX software was "the result of long and patient amatorial work, with the program constantly improving and growing since its first version." Actually, creating the software to determine the numerical integration of the nine planets, the
Re: [meteorite-list] Nakhla - What was turned to ash?
--- Ron Baalke <[EMAIL PROTECTED]> wrote: > > > > Hi List and dog lovers, > > > > If that dog ever existed, does anyone know what > kind of dog this would be. > > That is what breed of dog is common to Nakhla > Egypt? > > > > That is an excellent question. Does anyone know? > > Ron Baalke > You can always monitor slowness at this site with: 1) eBay 2) God threads 3) The Nakhla dog. In that order. We are at the Nakhla Dog index, so it is a really slow day. (I think it was white, a mut with a crater in its head) Steve Schoner/ams __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Nakhla - What was turned to ash?
> > Hi List and dog lovers, > > If that dog ever existed, does anyone know what kind of dog this would be. > That is what breed of dog is common to Nakhla Egypt? > That is an excellent question. Does anyone know? Ron Baalke __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Boiling Seas Linked To Mass Extinction
http://www.nature.com/nsu/030818/030818-16.html Boiling seas linked to mass extinction Methane belches may have catastrophic consequences. Tom Clarke Nature Science Update 22 August 2003 A massive methane explosion frothing out of the world's oceans 250 million years ago caused the Earth's worst mass extinction, claims a US geologist. Similar, smaller-scale events could have happened since, which might explain the Biblical flood, for example, suggests Gregory Ryskin of Northwestern University in Evanston, Illinois[1]. And they could happen again: "It's a very conjectural idea but it's too important to ignore," says Ryskin. Up to 95% of Earth's marine species disapeared at the end of the Permian period. Some 70% of land species, including plants, insects and vertebrates, also perished. "It's arguably the single most important event in biology but there's no consensus as to what happened," says palaeontologist Andrew Knoll of Harvard University in Cambridge, Massacheusetts. Ryskin contends that methane from bacterial decay or from frozen methane hydrates in deep oceans began to be released. Under the enormous pressure from water above, the gas dissolved in the water at the bottom of the ocean and was trapped there as its concentration grew. Just one disturbance - a small meteorite impact or even a fast moving mammal - could then have brought the gas-saturated water closer to the surface. Here it would have bubbled out of solution under the reduced pressure. Thereafter the process would have been unstoppable: a huge overturning of the water layers would have released a vast belch of methane. The oceans could easily have contained enough methane to explode with a force about 10,000 times greater than the world's entire nuclear-weapons stockpile, Ryskin argues. "There would be mortality on a massive scale," he says. "It's a wacky idea," says geologist Paul Wignall of the University of Leeds, UK, "but not so wild that it shouldn't be taken seriously." There is evidence that the oceans stagnated at the end of the Permian period. And the chemical signature in fossils of the time hints there was a massive change in the amount of atmospheric carbon dioxide. Carbon dioxide would have been produced as methane broke down or exploded in the atmosphere. After all, belches of trapped methane from lakes and oceans are "a rare but well-known maritime hazard", Wignall adds. Flood warning The same phenomenon could explain more recent events, such as the Biblical flood, Ryskin also argues. An eruption from Europe's stagnant Black Sea would fit the bill. There is even some geological evidence that such an event took place 7,000-8,000 years ago. Other sluggish seas might still be accumulating methane at their depths and could represent a future hazard, Ryskin adds. "Even if there's only a small probability that I am right, we should start looking for areas of the ocean where this might be happening," he argues. References 1. Ryskin, G. Methane driven oceanic eruptions and mass extinctions. Geology, 31, 737 - 740, (2003). __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
RE: [meteorite-list] Re: rust and crust
Stephen, I have also treated Irons with NaOH , it is important to wash them well in good quality 'distilled' water, and alcohol (preferably anhydrous & pure) and dry in a drying oven for a few hours, then quickly apply a coating of VCI/metal protector [before the iron cools] (otherwise moisture condenses back onto the surface, when it gets cold). You should handle irons with gloves until they are protected, otherwise fingerprints start the rust cycle off. One of my other Hobbies is Clock repair, and we often have similar problems with watch/clock movements, you find that once you clean a metal surface such as a watch movement, it is far more likely to tarnish than before! So you need to get some sort of barrier onto the surface to prevent condensation & corrosion, most clock cleaning solutions have a VCI added for this very purpose, you can also wipe with oil, (although some oils contain water!!) or lacquer of course as a last resort. I suspect that the use of a 'clock cleaner solution' (Non-Ammonia based!!) or 'clock rinse' with VCI added, could be a good thing to use as a cleaner to remove rust, as people have been putting a lot of research into corrosion prevention in this area with good results, and there are numerous concoctions out there to prevent rust. I don't know if anyone has ever done any serious research into corrosion prevention in meteorites, maybe we should bite the bullet and start a large scale trial, to see just what works an what doesn't? Just my thoughts, Mark Ford __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list