[meteorite-list] Impact Duration Time
Hello List, Would any members be able to help with a question I have regarding the impact-duration-time (???) of some typical falls? I don't know if that's the best terminology to use, but what I mean is: What would be a typical measure of time between the impact of the FIRST (known) individual at the start of the strewnfield, and the fall of the LAST (known) individual? I can't remember ever having read of any instances where these times were actually determined. I know the odds for accurate recordings of both of these times would be very slim, but does anyone know IF they have ever been recorded for a fall(s)? Also, is it a relatively simple matter of getting a VERY rough ESTIMATE of the spread of time by simply dividing the length of the strewnfield by a max free fall speed of ~ 200mph??? I know that the angle of entry, the wind speed, the density of the meteorite, etc., would all affect the results, and the answer from such a simple equation would truly give ONLY an estimate if I'm right. But WOULD this give an approximate duration time?? For instance, if a strewnfield is ~ 7 miles long, would it be fairly accurate to say that meteorites were impacting over about a 2 minute spread of time during the fall? And if the strewnfield was ~20 miles long, impacts may have occurred over ~ 6 minutes? (7 miles/200mph = 0.035 hours,or = ~2.1 minutes) (20 miles/200mph =0.1 hours, or = ~ 6 minutes) Finally, IF all the above is even halfway accurate, could one safely say that during a typical fall, meteorites are impacting down the length of the strewnfield for approximately 1 to 5 minutes? Or am I way off base? If this is right, I never thought about the concept of meteorites hitting the ground for 5 solid minutes (or more!) during a fall. That puts thing in a different perspective, to me at least. Thanks, Robert Woolard Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Impact Duration Time
Hello List, Would any members be able to help with a question I have regarding the impact-duration-time (???) of some typical falls? I don't know if that's the best terminology to use, but what I mean is: What would be a typical measure of time between the impact of the FIRST (known) individual at the start of the strewnfield, and the fall of the LAST (known) individual? I can't remember ever having read of any instances where these times were actually determined. I know the odds for accurate recordings of both of these times would be very slim, but does anyone know IF they have ever been recorded for a fall(s)? Also, is it a relatively simple matter of getting a VERY rough ESTIMATE of the spread of time by simply dividing the length of the strewnfield by a max free fall speed of ~ 200mph??? I know that the angle of entry, the wind speed, the density of the meteorite, etc., would all affect the results, and the answer from such a simple equation would truly give ONLY an estimate if I'm right. But WOULD this give an approximate duration time?? For instance, if a strewnfield is ~ 7 miles long, would it be fairly accurate to say that meteorites were impacting over about a 2 minute spread of time during the fall? And if the strewnfield was ~20 miles long, impacts may have occurred over ~ 6 minutes? (7 miles/200mph = 0.035 hours,or = ~2.1 minutes) (20 miles/200mph =0.1 hours, or = ~ 6 minutes) Finally, IF all the above is even halfway accurate, could one safely say that during a typical fall, meteorites are impacting down the length of the strewnfield for approximately 1 to 5 minutes? Or am I way off base? If this is right, I never thought about the concept of meteorites hitting the ground for 5 solid minutes (or more!) during a fall. That puts thing in a different perspective, to me at least. Thanks, Robert Woolard Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Rare 5-Day Extravaganza - AD
Dear List members, Over the next five days, I have different sets of excellent auctions ending, totaling 151 specimens. To make it easier to see the different sets ending on the particular days, I have made links to just those days worth of material. They are: 1) Today (Wednesday) - 59 items, most started at 99 cents (MANY low prices will be realized today!!), ending in about seven hours (Be sure to check both pages). http://search.ebay.com/search/search.dll?sofocus=sosbrftog=1catref=C6rd=0frpp=50satitle=sacat=-1%26catref%3DC6sadis=200fpos=33852sabfmts=1saobfmts=insifdff=1dfs=20080219dfts=14dfe=20080219dfte=24price=1saprclo=saprchi=seller=1sass=naturesvaultfsop=1%26fsoo%3D1fgtp= 2) Friday - 18 items, The HUGE selection of LARGE Planetary specimens, including the World's Largest Granulitic Lunar!!! http://search.ebay.com/search/search.dll?sofocus=sosbrftog=1catref=C6rd=0frpp=50satitle=sacat=-1%26catref%3DC6sadis=200fpos=33852sabfmts=1saobfmts=insifdff=1dfs=20080221dfts=14dfe=20080221dfte=24saprclo=saprchi=seller=1sass=naturesvaultfsop=1%26fsoo%3D1fgtp= 3) Sunday - 14 items, a dozen 2-kilo Lots of Saharan Unclassified stones and 3 more smaller Planetary meteorites. http://search.ebay.com/search/search.dll?sofocus=sosbrftog=1catref=C6rd=0frpp=50satitle=sacat=-1%26catref%3DC6sadis=200fpos=33852sabfmts=1saobfmts=insifdff=1dfs=20080223dfts=10dfe=20080223dfte=24saprclo=saprchi=seller=1sass=naturesvaultfsop=1fsoo=1 4) Monday - 60 items, Angrites, Angrites, Maskelynite-rich Eucrite and MORE Planetary choices (Be sure to check both pages)! http://search.ebay.com/search/search.dll?sofocus=sosbrftog=1catref=C6rd=0frpp=50satitle=sacat=-1%26catref%3DC6sadis=200fpos=33852sabfmts=1saobfmts=insifdff=1dfs=20080224dfts=10dfe=20080224dfte=24saprclo=saprchi=seller=1sass=naturesvaultfsop=1%26fsoo%3D1 To see all 151 items I currently have available on one link, please click here: http://search.ebay.com/_W0QQsassZnaturesvault I appreciate all who bid with me, and if you do not like to bid, contact me Off List to let me know of anything you are interested in. Best regards, Greg Greg Hupe The Hupe Collection NaturesVault (eBay) [EMAIL PROTECTED] www.LunarRock.com IMCA 3163 Click here for my current eBay auctions: http://search.ebay.com/_W0QQsassZnaturesvault __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Impact Duration Time
On Wed, 19 Mar 2008 07:40:07 -0700 (PDT), you wrote: Hello List, Would any members be able to help with a question I have regarding the impact-duration-time (???) of some typical falls? I don't know if that's the best terminology to use, but what I mean is: What would be a typical measure of time between the impact of the FIRST (known) individual at the start of the strewnfield, and the fall of the LAST (known) individual? Okay, I'm just pulling this out of my rear, so take it as you will, but shouldn't they all land at pretty much the same time? The vertical component of their speed is provided by gravity, and should be mostly the same for all pieces except for small differences in areodynamics caused by different shapes of stones. __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Impact Duration Time
Strewn field shape is the product of two factors: (1) the meteoroid may break up over a long distance, and (2) individual components are distributed by wind during cold fall. In the first case, this breakup may cover a lot of ground, but happens while the meteoroid is still hypersonic. So no more than a few seconds separate the beginning and end of the breakup. After that, everything is falling at the same rate, so (in the absence of aerodynamic effects) will land at about the same time. In the second case, wind only affects the horizontal velocity component, so it has no effect on the landing time. The only significant factor is the timing introduced by the terminal velocities of the individual components. Given a reasonable range of shapes and sizes, you might have some components falling at 50 m/s, and others at 200 m/s. For a typical fall height, that means you could reasonably expect as much as 5-10 minutes between the first and last components reaching the ground. Chris * Chris L Peterson Cloudbait Observatory http://www.cloudbait.com - Original Message - From: Robert Woolard [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Wednesday, March 19, 2008 8:40 AM Subject: [meteorite-list] Impact Duration Time Hello List, Would any members be able to help with a question I have regarding the impact-duration-time (???) of some typical falls? I don't know if that's the best terminology to use, but what I mean is: What would be a typical measure of time between the impact of the FIRST (known) individual at the start of the strewnfield, and the fall of the LAST (known) individual? I can't remember ever having read of any instances where these times were actually determined. I know the odds for accurate recordings of both of these times would be very slim, but does anyone know IF they have ever been recorded for a fall(s)? Also, is it a relatively simple matter of getting a VERY rough ESTIMATE of the spread of time by simply dividing the length of the strewnfield by a max free fall speed of ~ 200mph??? I know that the angle of entry, the wind speed, the density of the meteorite, etc., would all affect the results, and the answer from such a simple equation would truly give ONLY an estimate if I'm right. But WOULD this give an approximate duration time?? For instance, if a strewnfield is ~ 7 miles long, would it be fairly accurate to say that meteorites were impacting over about a 2 minute spread of time during the fall? And if the strewnfield was ~20 miles long, impacts may have occurred over ~ 6 minutes? (7 miles/200mph = 0.035 hours,or = ~2.1 minutes) (20 miles/200mph =0.1 hours, or = ~ 6 minutes) Finally, IF all the above is even halfway accurate, could one safely say that during a typical fall, meteorites are impacting down the length of the strewnfield for approximately 1 to 5 minutes? Or am I way off base? If this is right, I never thought about the concept of meteorites hitting the ground for 5 solid minutes (or more!) during a fall. That puts thing in a different perspective, to me at least. Thanks, Robert Woolard __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Impact times- correction
List and Darren, Well I can already see that I probably did make a wrong assumption. The 200mph figure probably doesn't have anything to do with determing the duration time. What might make a difference is if the individuals of the fall retained any lateral differences in speed when the point(s) of retardation and disruption(s) were reached. But before I make even more incorrect assumptions, I guess my basic question should have been: IS there any difference in time between the impact of the first and last individuals of a fall, and if so, has that time difference ever been recorded, or estimated? Thanks, Robert Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Impact times
Robert, The only timed event that I can think of that was accurately timed was the Shoemaker-Levy comet impact on Jupiter. This is something I never gave any thought to. Good Luck!! Pete __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Need Help with Expedition Video footage
I'm looking for a video editing volunteer. My 2 week expedition recovering the new fall was well documented, dozens and dozens of pictures and over 1.5 hours of video clips of interviews, relevant scenery, daily planning, and trips to impact points. My plan is too filter and condense all this footage into a new fall documentary of maybe 15-20 minutes. I wasn't out to produce a TV grade documentary, but one a simple one that covers the chronology of the day to day roller coaster of boots-on-the-ground rumor hunting. I'm a bit overloaded right now trying to catch up at work and don't really have time to learn new video software. Please contact me OFF LIST. __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Impact times
The only timed event that I can think of that was accurately timed was the Shoemaker-Levy comet impact on Jupiter. Yeah, but that's an entirely different sort of parent than anything we've seen on Earth, since it was fragmented into a long chain of components _before_ it encountered Jupiter's atmosphere. AFAIK no meteorites are associated with bodies that were fragmented in space, and only a few meteors have been observed that appear to be from such bodies. Chris * Chris L Peterson Cloudbait Observatory http://www.cloudbait.com - Original Message - From: Pete Shugar [EMAIL PROTECTED] To: Meteorite-list@meteoritecentral.com Sent: Wednesday, March 19, 2008 10:24 AM Subject: [meteorite-list] Impact times Robert, The only timed event that I can think of that was accurately timed was the Shoemaker-Levy comet impact on Jupiter. This is something I never gave any thought to. Good Luck!! Pete __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Further thoughts
Consider the Fireball. When the (soon to be) meteorite explodes into a fireball, the pieces are blown in every direction, Those blown in the direction that the meteor came from which should give them a negative speed and as such will start to drop first. Those in the direction of travel give the furtherest reach from the above mentioned pieces. This will define the outside distance of the strewnfield. Some will be blown up and some will be blown down. I would suspect that those that are blown downward would be the first to reach ground as these will be accelarated and those that are blown upward must go up before they can come down, so they should be the last to reach the ground. This means that the middle of the strewnfield is the first to be populated as well as the last to be populated. The two ends fill up in between the first and last parts of the fall. Anyone care to check? I don't think I missed anything, but I'm not an EXPERT, just using deductive reasoning. Pete __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Impact Duration Time
Robert W. wrote: VERY rough ESTIMATE of the spread of time by simply dividing the length of the strewnfield by a max free fall speed of ~ 200mph??? ... IF all the above is even halfway accurate, could one safely say that during a typical fall, meteorites are impacting down the length of the strewnfield for approximately 1 to 5 minutes? Or am I way off base? Hi Robert, Listees, I think the times you mention may be in the ball-park, but not necessarily for the logic of dividing by 200mph the length of the strewn field. Remember the free fall velocity is downward (vertical) and the strewn field is a horizontal section of it. So the strewn filed major axis lengthnwould have at least two main drivers: 1) How quickly and at what height fragmentation happens (and as you say incident angle but during the period the fragments still have cosmic velocity). 2) The difference in Free Fall speeds caused mainly by the different sizes. Remembering the cross sectional area inverse and mass have proportionalities to free fall velocity, I think the question is best understood by considering that with cosmic velocity in rarer atmosphere the dispersion is much faster - indeed still incandescent - and the differences in timing for impacts (or maybe we should call them landings in light of Peru) will be determined by the differences in vertical speed - not horizontal. The smaller particles fall more slowly of course as they have a higher surface area to mass ratio in most cases. So your times may be accurate but only in a minor sense have to do with the length of the strewn field major axis. On the contrary, I would expect that the biggest piece falls first furthest along the axis, and then the little pieces fill in, having traveled less distance but at a slower velocity in the tail end, which might not even fall in line with the azimuth of entry in many cases, especially falls that do not contain multiple fragmentations during incandescence (incl. small falls). If we say the difference in speed between pieces we can hold (and not powder and tiny grains which will remain suspended for very long times - just look at the photos, esp. the recent one from Peru of the persistent smoke.) So maybe take 200 mph as a difference between the biggest pieces and the smallest size pieces of interest to recoverers, and then your numbers work out in a general sense to be ok - but looking at the mean vertical direction mostly during free fall... So I say major axis length is a secondaryt factor. Best wishes and Great Health, Doug -Original Message- From: Robert Woolard [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Wed, 19 Mar 2008 8:40 am Subject: [meteorite-list] Impact Duration Time Hello List, Would any members be able to help with a question I have regarding the impact-duration-time (???) of some typical falls? I don't know if that's the best terminology to use, but what I mean is: What would be a typical measure of time between the impact of the FIRST (known) individual at the start of the strewnfield, and the fall of the LAST (known) individual? I can't remember ever having read of any instances where these times were actually determined. I know the odds for accurate recordings of both of these times would be very slim, but does anyone know IF they have ever been recorded for a fall(s)? Also, is it a relatively simple matter of getting a VERY rough ESTIMATE of the spread of time by simply dividing the length of the strewnfield by a max free fall speed of ~ 200mph??? I know that the angle of entry, the wind speed, the density of the meteorite, etc., would all affect the results, and the answer from such a simple equation would truly give ONLY an estimate if I'm right. But WOULD this give an approximate duration time?? For instance, if a strewnfield is ~ 7 miles long, would it be fairly accurate to say that meteorites were impacting over about a 2 minute spread of time during the fall? And if the strewnfield was ~20 miles long, impacts may have occurred over ~ 6 minutes? (7 miles/200mph = 0.035 hours,or = ~2.1 minutes) (20 miles/200mph =0.1 hours, or = ~ 6 minutes) Finally, IF all the above is even halfway accurate, could one safely say that during a typical fall, meteorites are impacting down the length of the strewnfield for approximately 1 to 5 minutes? Or am I way off base? If this is right, I never thought about the concept of meteorites hitting the ground for 5 solid minutes (or more!) during a fall. That puts thing in a different perspective, to me at least. Thanks, Robert Woolard _ ___ Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com
Re: [meteorite-list] Further thoughts
I don't think that fireballs explode that way. What happens is that pressure builds up until the material strength of the meteoroid is exceeded, and it fragments. There isn't an explosion as such (the appearance of an explosion is largely the result of energy released when lots of additional surface is suddenly exposed to ablation). The fragmented components continue traveling forward with approximately equal velocities. There's little lateral movement, and nothing ends up traveling in the opposite direction. In the case of a single terminal explosion, the shape and direction of the strewn field may have more to do with upper atmosphere winds than with the original direction of the meteor, or with the dynamics of the breakup. Chris * Chris L Peterson Cloudbait Observatory http://www.cloudbait.com - Original Message - From: Pete Shugar [EMAIL PROTECTED] To: Meteorite-list@meteoritecentral.com Sent: Wednesday, March 19, 2008 10:45 AM Subject: [meteorite-list] Further thoughts Consider the Fireball. When the (soon to be) meteorite explodes into a fireball, the pieces are blown in every direction, Those blown in the direction that the meteor came from which should give them a negative speed and as such will start to drop first. Those in the direction of travel give the furtherest reach from the above mentioned pieces. This will define the outside distance of the strewnfield. Some will be blown up and some will be blown down. I would suspect that those that are blown downward would be the first to reach ground as these will be accelarated and those that are blown upward must go up before they can come down, so they should be the last to reach the ground. This means that the middle of the strewnfield is the first to be populated as well as the last to be populated. The two ends fill up in between the first and last parts of the fall. Anyone care to check? I don't think I missed anything, but I'm not an EXPERT, just using deductive reasoning. Pete __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Further thoughts
Pete wrote: Some will be blown up and some will be blown down. I believe this is a common misconception for many in the meteorite community and common thought. I don't think anything is blowing up. Simply fragmenting. Each part of the original whole maintains its portion of momentum upon fragmentation. The direction of the momentum is along the angle of entry. There is no blowing up in that sense of a bomb which propells fragments in all directions as there is no internal source of energy (like in a chemical explosive). The only dispersion will be caused by different frictional (aerodynamic effects) deviations like sticking your hand out the car window and using yourwrist as an aileron. If your fingers fell off your hand, there would be no explosion, and nothing being blown forward either :-) Best health, Doug sorry - now caught up with the good replies on this topic, we just got electricity internet, etc. back after the nuclear winter our city experienced yesterday where we couldn't see the Sun on a clear day -Original Message- From: Pete Shugar [EMAIL PROTECTED] To: Meteorite-list@meteoritecentral.com Sent: Wed, 19 Mar 2008 10:45 am Subject: [meteorite-list] Further thoughts Consider the Fireball. When the (soon to be) meteorite explodes into a fireball, the pieces are blown in every direction, Those blown in the direction that the meteor came from which should give them a negative speed and as such will start to drop first. Those in the direction of travel give the furtherest reach from the above mentioned pieces. This will define the outside distance of the strewnfield. Some will be blown up and some will be blown down. I would suspect that those that are blown downward would be the first to reach ground as these will be accelarated and those that are blown upward must go up before they can come down, so they should be the last to reach the ground. This means that the middle of the strewnfield is the first to be populated as well as the last to be populated. The two ends fill up in between the first and last parts of the fall. Anyone care to check? I don't think I missed anything, but I'm not an EXPERT, just using deductive reasoning. Pete __ http://www.meteoritecentral.com Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Jim Kriegh's collection in OV
http://www.explorernews.com/article/show/21655 Don't miss Twink's great article about the display of some of Jim Kriegh's meteorites in Oro Valley! Best, Doug Kriegh's rocks from the sky on display in OV Guest column by Twink Monrad - --- By: Special to the Explorer March 19, 2008 - --- In 1995 Jim Kriegh, his friend John Blennert, and I belonged to the Desert Gold Diggers, a local club whose members hunt for gold in Arizona. Dr. David Kring, a meteoriticist and planetary scientist from the University of Arizona, spoke at one of the club’s meetings and encouraged those who used metal detectors to keep an eye and ear out for meteorites, generally small nondescript objects that look nothing like gold. Jim paid good attention, because while searching for gold in the Santa Rita Mountains he found a rock which turned out to be a meteorite, later named the Greaterville meteorite. Jim and John also searched for gold far north of Tucson in the northwestern corner of the state, the Gold Basin area. While there, they kept hearing rocks which sounded like gold on their metal detectors but did not look like gold. Jim took some samples to Dr.Kring, who identified them as stone meteorites. I was invited along on the next trip to Gold Basin. We went with our camping equipment and, most important, a generator and power saw to cut any likely meteorite specimens that we might find. The first day, John and Jim came back to camp with numerous rocks while I was still learning how to use my detector! Several times a day we would bring back rocks which made noise and were magnetic. Jim sawed them open. Some were meteorites, and some were not. As the week progressed, we became more aware of how the meteorites looked, and soon we did not need to saw them open to identify them. We took our finds to Dr. Kring at UA. It seemed Jim had discovered a rare strewn field. Now our real work began. We prepared an index card for each meteorite with notes on gram weight, date, location, and whether it was found on the surface or the depth if buried. We also marked each location on a topographic map, but it soon became apparent that there would be too many, so Jim began numbering them as groups. A further request was that we would tell no one about the find so the university could properly study the area for two years. Suddenly we three became a team to assist the University of Arizona. We found over 2,000 meteorites, and expanded the strewn field boundaries to five miles by 15 miles. It is not known how large the field really is. Meteorite composition tests show that these are L4 stone meteorites, which fell approximately 15,000 years ago, near the end of the Ice Age. We each found a couple of different meteorites in this field which represented different falls at different times in addition to the original Gold Basin meteorite. Searching for meteorites is fun and may also make valuable contributions to science, as did Jim’s discovery at Gold Basin. Meteorites and other objects from space have been important throughout history for those who watched the night sky. We are fortunate that Jim’s meteorite collection is available for the Oro Valley community to enjoy. __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] The Oscar E. Monnig Meteorite Collection
Page 78, Gujba, New Mexico ? Nigeria, Cheers, Christian I.M.C.A. #2673 at www.imca.cc website: www.austromet.com Ing. Christian Anger Korngasse 6 2405 Bad Deutsch-Altenburg AUSTRIA email: [EMAIL PROTECTED] email: [EMAIL PROTECTED] __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Wanted to Buy : Superb Pallasite!
Greetings List! I'm having difficulty locating the right piece of Pallasite for a friend of mine who is ready to purchase. Exact type/fall is not the most important factor. What is most important is aesthetic beauty and the olivine crystals must be high quality - the piece should be like transparent stained glass when held in front of a light. I'd like something around 50mm X 40mm in size, or somewhere around that : no postage-stamp sized pieces please. I know this won't be cheap and this is a serious request - I am not just window shopping. ;) Contact me off-list with offers. Thanks in advance! MikeG in Louisiana Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] New Crater Found?
Hi All, Ok, not NEW in geological terms, but new to us maybe... Just received an email that and Australian geologist accidentally discovered a meteorite crater in western Australia. Dr. Hickman, from the Geological Survey of Western Australia sent the Google Earth picture to a colleague who was able to confirm that it was an undiscovered meteorite crater. The crater is now named Hickman crater. The crater is believed to be between 10,000 and 100,000 years old and is 885 feet across. SOURCE: http://www.webpronews.com/topnews/2008/03/18/google-earth-leads-geologist-to-meteor-crater You can also read more here: http://www.gearthblog.com/blog/archives/2008/03/australian_geologist_accidentally_d.html I also found another link from that article. This is probably old news but I thought I'd share: A Huge 19 mile wide Crater in the Sahara: http://www.gearthblog.com/blog/archives/2006/03/huge_crater_dis.html And Here: http://www.space.com/scienceastronomy/060303_big_crater.html Cool stuff! Eric MW __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] New Crater Found?
All, Does anyone know what field work and follow on scientific analysis was done to confirm the crater as being an impact crater? Without collection of geological data and samples from the alleged impact site followed by scientific analysis of same, it CANNOT be confirmed as an impact crater. This is analogous as to the scientific classification process that alleged meteorites must undergo in order to CONFRIM their origin. All the best. Greg Redfern -Original Message- From: Eric Wichman [EMAIL PROTECTED] Sent: Mar 19, 2008 2:31 PM To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] New Crater Found? Hi All, Ok, not NEW in geological terms, but new to us maybe... Just received an email that and Australian geologist accidentally discovered a meteorite crater in western Australia. Dr. Hickman, from the Geological Survey of Western Australia sent the Google Earth picture to a colleague who was able to confirm that it was an undiscovered meteorite crater. The crater is now named Hickman crater. The crater is believed to be between 10,000 and 100,000 years old and is 885 feet across. SOURCE: http://www.webpronews.com/topnews/2008/03/18/google-earth-leads-geologist-to-meteor-crater You can also read more here: http://www.gearthblog.com/blog/archives/2008/03/australian_geologist_accidentally_d.html I also found another link from that article. This is probably old news but I thought I'd share: A Huge 19 mile wide Crater in the Sahara: http://www.gearthblog.com/blog/archives/2006/03/huge_crater_dis.html And Here: http://www.space.com/scienceastronomy/060303_big_crater.html Cool stuff! Eric MW __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] New Crater Found?
Hi Eric, his is the one Darren sent in tother day. Jerry Flaherty - Original Message - From: Eric Wichman [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Wednesday, March 19, 2008 2:31 PM Subject: [meteorite-list] New Crater Found? Hi All, Ok, not NEW in geological terms, but new to us maybe... Just received an email that and Australian geologist accidentally discovered a meteorite crater in western Australia. Dr. Hickman, from the Geological Survey of Western Australia sent the Google Earth picture to a colleague who was able to confirm that it was an undiscovered meteorite crater. The crater is now named Hickman crater. The crater is believed to be between 10,000 and 100,000 years old and is 885 feet across. SOURCE: http://www.webpronews.com/topnews/2008/03/18/google-earth-leads-geologist-to-meteor-crater You can also read more here: http://www.gearthblog.com/blog/archives/2008/03/australian_geologist_accidentally_d.html I also found another link from that article. This is probably old news but I thought I'd share: A Huge 19 mile wide Crater in the Sahara: http://www.gearthblog.com/blog/archives/2006/03/huge_crater_dis.html And Here: http://www.space.com/scienceastronomy/060303_big_crater.html Cool stuff! Eric MW __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Rockabye chondrules, in the protoplanetary disk...
http://www.sciencedaily.com/releases/2008/03/080319140319.htm Mars, Earth And Moon From 'Unique Planetary Nursery' Science Daily (Mar. 19, 2008) A study of meteorites suggests that Mars, the Earth and the Moon share a common composition from growing up in a unique planetary nursery in the inner solar system. The finding could lead to a rethink of how the inner solar system formed. In the journal Nature the international team of scientists, which includes Professor Alex Halliday from Oxford Universitys Department of Earth Sciences, report how they analysed 16 meteorites that fell to Earth from Mars. They found that the amounts of neodymium-142 these contain are subtly different from those of objects found in the asteroid belt. This isotopic fingerprint is proof that the chemistry of the inner solar system was different even for elements that are hard to vapourise. Professor Halliday said: The Earth, Moon and Mars appear to have formed in a part of the inner solar system with a ratio of samarium to neodymium that is around 5 per cent more than could be found in the asteroid belt. It is this family resemblance that we see today when we compare oceanic basalts from Earth with Moon rocks and Martian meteorites. Such differences may be the result of the erosion of planetary crusts during formation events, alternatively, this composition arose from the sorting of clouds of partially melted droplets or grains - known as chondrules. Earth has a long geological history of recycling the materials that make up its crust and mantle, which could help explain why its composition is different from that of other planetary bodies it could, for example, have deeply buried reservoirs of certain elements. However Mars and the Moon are believed to have been nothing like as active during their lifespan: making it much more difficult for any theory involving material recycling to explain why their composition should differ from other planetary bodies and yet have such similarities with the composition of the Earth. Professor Halliday said: What our results suggest is that the sorting of the elements that make up these planets may have happened at a much earlier stage than had been believed. It may even be that this sorting happened in the accretion disk out of which Mars and the early Earth first formed. What we can say is that the composition of these worlds is inconsistent with them simply forming out of large lumps of stony meteorites, like those we see today in the asteroid belt. A report of the research, entitled Super-chondritic Sm/Nd in Mars, Earth and the Moon, is published in Nature on 20 March 2008. Co-author Alex Halliday is Professor of Geochemistry at Oxford Universitys Department of Earth Sciences and Head of the MPLS Division. The international team included scientists from the Universite Denis Diderot, France, the ETH Zurich, Switzerland and the Ecole Normale Superieure de Lyon, France. Adapted from materials provided by University of Oxford. __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] New Crater Found?
Hi, Greg, List, GooglEarthers, The coordinates are are: 119.6831112903886,-23.0371,0 If you have Google Earth installed, this link: http://bbs.keyhole.com/ubb/download.php?Number=1134293 will start Google Earth and take you there. Doesn't look like an impact feature to me: no raised rim, no visible tilted strata, the altitudes of various parts of the feature given by Google (if accurate) don't make sense -- it's not deep enough, unless it's been largely filled in. It's been cut through on the west by a flood gully (which does show consistent altitudes) but there's no trace of a rim on the western end on the other side of the gully. It IS circular, but is that enough? Maybe it is; maybe it isn't is my first impression. Sterling K. Webb - - Original Message - From: Greg Redfern [EMAIL PROTECTED] To: Eric Wichman [EMAIL PROTECTED]; meteorite-list@meteoritecentral.com Sent: Wednesday, March 19, 2008 2:13 PM Subject: Re: [meteorite-list] New Crater Found? All, Does anyone know what field work and follow on scientific analysis was done to confirm the crater as being an impact crater? Without collection of geological data and samples from the alleged impact site followed by scientific analysis of same, it CANNOT be confirmed as an impact crater. This is analogous as to the scientific classification process that alleged meteorites must undergo in order to CONFRIM their origin. All the best. Greg Redfern -Original Message- From: Eric Wichman [EMAIL PROTECTED] Sent: Mar 19, 2008 2:31 PM To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] New Crater Found? Hi All, Ok, not NEW in geological terms, but new to us maybe... Just received an email that and Australian geologist accidentally discovered a meteorite crater in western Australia. Dr. Hickman, from the Geological Survey of Western Australia sent the Google Earth picture to a colleague who was able to confirm that it was an undiscovered meteorite crater. The crater is now named Hickman crater. The crater is believed to be between 10,000 and 100,000 years old and is 885 feet across. SOURCE: http://www.webpronews.com/topnews/2008/03/18/google-earth-leads-geologist-to-meteor-crater You can also read more here: http://www.gearthblog.com/blog/archives/2008/03/australian_geologist_accidentally_d.html I also found another link from that article. This is probably old news but I thought I'd share: A Huge 19 mile wide Crater in the Sahara: http://www.gearthblog.com/blog/archives/2006/03/huge_crater_dis.html And Here: http://www.space.com/scienceastronomy/060303_big_crater.html Cool stuff! Eric MW __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Meteorite market trends - a critical note
Dear List, I'm a meteorite collector since 1991, and have personally witnessed the start of the flood of Saharan meteorites. I think all these - also rare - Saharan meteorites becoming available for us collectors, was/is very possitive. Collecting is investing. Every collector wants to see the value of his collection stay sable at the least. So I very much want to believe recent mails stating the value of meteorites are on the rise again. However. The ebay auction referred to below is my latest experience of the contrary. This is just one example. This really good meteorite didn't sell at a starting price of only $0.22/gram (or approx. Euro 0.14/gram). Especially for Euro countries this is a bottom price (or even lower). Or am I mistaken in stating this? Just my thoughts, Regards, Rob Lenssen - Original Message - From: Rob Lenssen [EMAIL PROTECTED] To: Meteorite-list@meteoritecentral.com Sent: Saturday, March 15, 2008 6:46 PM Subject: [meteorite-list] AD: massive Saharan meteorite with very good crust Dear List, For those of you interested in a large Saharan meteorite with really good crust, have a look at my auction: http://cgi.ebay.com/Sahara99704-2-3kg-brecciated-chondrite_W0QQitemZ280208468832QQihZ018QQcategoryZ3239QQssPageNameZWDVWQQrdZ1QQcmdZViewItem Bidding for this 2.3kg meteorite starts at $499. This only $0.22/gram (or approx. Euro 0.14/gram). For a higher-than-ebay resolution image see: http://home.planet.nl/~rlenssen/Sahara99704.jpg Thanks, Rob Lenssen __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Wanted to Buy : Superb Pallasite!
If money isn´t the most important key factor, I would suggest an ultrathin (!) slice of Esquel or Imilac, but if money counts, I would rather suggest an olivine-rich portion of thinly cut Seymchan. All of these are known to be quite stable against rusting over time. Glorieta could be another good choice in the lower cost ranges of widely available pallasites... Good luck, and happy Easter, Alex Berlin/Germany Original-Nachricht Datum: Wed, 19 Mar 2008 11:31:43 -0700 (PDT) Von: Michael Gilmer [EMAIL PROTECTED] An: meteorite-list@meteoritecentral.com Betreff: [meteorite-list] Wanted to Buy : Superb Pallasite! Greetings List! I'm having difficulty locating the right piece of Pallasite for a friend of mine who is ready to purchase. Exact type/fall is not the most important factor. What is most important is aesthetic beauty and the olivine crystals must be high quality - the piece should be like transparent stained glass when held in front of a light. I'd like something around 50mm X 40mm in size, or somewhere around that : no postage-stamp sized pieces please. I know this won't be cheap and this is a serious request - I am not just window shopping. ;) Contact me off-list with offers. Thanks in advance! MikeG in Louisiana Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] New Crater Found?
Hi, Grag, List, As Jerry just pointed out, this was posted by Darren on the 17th, headed Possible Ancient Impact Crater Australia with this source: http://www.sciencealert.com.au/news/20081803-17058-2.html Dr Hickman, from the Geological Survey of Western Australia, was using Google Earth to look for iron ore when he noticed an unusually circular structure. He sent a Google Earth picture of the structure to his colleague Dr Andrew Glickson at the Australian National University, who later visited the area and confirmed that Dr Hickman had found a particularly well preserved meteorite crater. Sterling K. Webb - - Original Message - From: Greg Redfern [EMAIL PROTECTED] To: Eric Wichman [EMAIL PROTECTED]; meteorite-list@meteoritecentral.com Sent: Wednesday, March 19, 2008 2:13 PM Subject: Re: [meteorite-list] New Crater Found? All, Does anyone know what field work and follow on scientific analysis was done to confirm the crater as being an impact crater? Without collection of geological data and samples from the alleged impact site followed by scientific analysis of same, it CANNOT be confirmed as an impact crater. This is analogous as to the scientific classification process that alleged meteorites must undergo in order to CONFRIM their origin. All the best. Greg Redfern -Original Message- From: Eric Wichman [EMAIL PROTECTED] Sent: Mar 19, 2008 2:31 PM To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] New Crater Found? Hi All, Ok, not NEW in geological terms, but new to us maybe... Just received an email that and Australian geologist accidentally discovered a meteorite crater in western Australia. Dr. Hickman, from the Geological Survey of Western Australia sent the Google Earth picture to a colleague who was able to confirm that it was an undiscovered meteorite crater. The crater is now named Hickman crater. The crater is believed to be between 10,000 and 100,000 years old and is 885 feet across. SOURCE: http://www.webpronews.com/topnews/2008/03/18/google-earth-leads-geologist-to-meteor-crater You can also read more here: http://www.gearthblog.com/blog/archives/2008/03/australian_geologist_accidentally_d.html I also found another link from that article. This is probably old news but I thought I'd share: A Huge 19 mile wide Crater in the Sahara: http://www.gearthblog.com/blog/archives/2006/03/huge_crater_dis.html And Here: http://www.space.com/scienceastronomy/060303_big_crater.html Cool stuff! Eric MW __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Crater Identification
RE: confirming an impact structure, I've compiled some information on the subject at: http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/intro.html If I have missed anything, please let me know. Chuck O'Dale http://www.ottawa.rasc.ca/articles/odale_chuck/earth_craters/index.html Date: Wed, 19 Mar 2008 15:13:26 -0400 (EDT) From: Greg Redfern [EMAIL PROTECTED] Subject: Re: [meteorite-list] New Crater Found? All, Does anyone know what field work and follow on scientific analysis was done to confirm the crater as being an impact crater? Without collection of geological data and samples from the alleged impact site followed by scientific analysis of same, it CANNOT be confirmed as an impact crater. This is analogous as to the scientific classification process that alleged meteorites must undergo in order to CONFRIM their origin. All the best. Greg Redfern __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] First Detection of Organic Molecules in Extrasolar Planetary Atmosphere
http://www.telegraph.co.uk/earth/main.jhtml?xml=/earth/2008/03/19/scialien119.xml Milestone in hunt for extraterrestrial life By Roger Highfield, Science Editor Astronomers have found organic chemicals on a planet outside our solar system for the first time, a milestone in the hunt for extraterrestrial life. Researchers also identified water in the searing hot atmosphere of the alien planet, which orbits a distant star more than 60 light years away. Roger Highfield explains the significance of the discovery of methane on the alien planet The planet is too close to its parent star and so is too hot for conditions to be favourable for life as we understand it. But the ability of scientists to analyse its atmosphere and detect simple carbon-based molecules is a crucial step in efforts to find planets which may harbour extraterrestrial life. The feat is reported today in Nature with possibly the best understood alien planet of all the 270 detected so far, called HD 189733b, which was discovered in 2005 in the constellation Vulpecula. The achievement demonstrates the ability to detect organic molecules in Goldilocks zones around planets, so named because they are just right for liquid water to be present. The planet - of a type often referred to as a 'hot Jupiter' - is like our own Jupiter, made of gas, but orbits much closer to its sun. The reason we know so much about this alien world is that, seen from our own Earth, it transits its star, passing in front of it during each 2.2-day-long orbit. As the light from the parent star passes through the atmosphere around the limb of the giant extrasolar planet, the gases in the atmosphere stamp their unique signature on the starlight from HD 189733. By using spectroscopy, which splits light into its components, scientists can see the fingerprints of various chemicals. Previous studies have predicted that methane and water would be present in the atmosphere, just like on Jupiter, but until now no definitive evidence has been found. Using light analysed by the Hubble Space Telescope, Dr Mark Swain of the Jet Propulsion Laboratory and the California Institute of Technology, Pasadena, and colleagues confirm the presence of methane. They also report in the journal Nature they have found the signature of water, but carbon monoxide, originally expected to be abundant in the upper atmosphere, was not identifiable. I am excited about our observations of methane because they represent a dress rehearsal for our ultimate goal of studying organic molecules on planets where life might exist, he tells the Telegraph. With this observation there is no question whether there is water or not -- water is present, he adds. These measurements are an important step to our ultimate goal of determining the conditions, such as temperature, pressure, winds, clouds, and so on, and the chemistry on planets where life could exist. Team member Dr Giovanna Tinetti from the University College London adds: We haven't found life on another planet yet, but this in an exciting step towards showing that we can detect these signature molecules. On Earth, methane is produced by a variety of sources: natural sources such as termites, the oceans and wetland environments, but also from cows, livestock and manmade sources like waste landfills and as a by-product of energy generation. But she adds: The planet's atmosphere is far too hot for even the hardiest life to survive - at least the kind of life we know from Earth. It's highly unlikely that cows could survive here! Prof Adam Showman of the University of Arizona, Tucson, says that despite its low abundance, the methane provides telling clues about planetary formation, evolution, weather, photochemistry and - in the case of Earth where oxygen is also present - life. These are exciting times for studies of extrasolar planets. Thirteen years after the discovery of the first extrasolar planet around a Sun-like star, we are finally moving beyond simply discovering such planets to truly characterising them as worlds. Considered suggestive of life, methane can also be made by non-biological processes. However, under the right circumstances methane can play a key role in prebiotic chemistry - the chemical reactions considered necessary to form life as we know it. The father of Gaia theory, the independent British scientist James Lovelock proposed that the simultaneous presence of oxygen and methane would be a convincing indication of life. The reason that it is a biosignature is that methane is turned by oxygen into carbon dioxide, so the fact that methane is seen on Earth means that the methane is continually produced, by bacteria in the guts of humans for example. But there is no sign of oxygen on this alien world. Unless molecular oxygen is constantly replenished by photosynthesis, it is quickly consumed in chemical reactions, in the atmosphere, on land and in seawater. So the presence of a large amount of oxygen in an extrasolar
Re: [meteorite-list] Wanted to Buy : Superb Pallasite!
Hello Alex, You are forgetting another very nice pallasite: Quijingue, the Brazilian one. Lesser known, but just as pretty. So a good investment. In my opinion. Anne M. Black _www.IMPACTIKA.com_ (http://www.IMPACTIKA.com) [EMAIL PROTECTED] (mailto:[EMAIL PROTECTED]) Vice-President, I.M.C.A. Inc. _www.IMCA.cc_ (http://www.IMCA.cc) -Original Message- From: Alexander Seidel [EMAIL PROTECTED] To: Michael Gilmer [EMAIL PROTECTED]; meteorite-list@meteoritecentral.com Sent: Wed, 19 Mar 2008 2:12 pm Subject: Re: [meteorite-list] Wanted to Buy : Superb Pallasite! If money isn´t the most important key factor, I would suggest an ultrathin (!) slice of Esquel or Imilac, but if money counts, I would rather suggest an olivine-rich portion of thinly cut Seymchan. All of these are known to be quite stable against rusting over time. Glorieta could be another good choice in the lower cost ranges of widely available pallasites... Good luck, and happy Easter, Alex Berlin/Germany Original-Nachricht Datum: Wed, 19 Mar 2008 11:31:43 -0700 (PDT) Von: Michael Gilmer [EMAIL PROTECTED] An: meteorite-list@meteoritecentral.com Betreff: [meteorite-list] Wanted to Buy : Superb Pallasite! Greetings List! I'm having difficulty locating the right piece of Pallasite for a friend of mine who is ready to purchase. Exact type/fall is not the most important factor. What is most important is aesthetic beauty and the olivine crystals must be high quality - the piece should be like transparent stained glass when held in front of a light. I'd like something around 50mm X 40mm in size, or somewhere around that : no postage-stamp sized pieces please. I know this won't be cheap and this is a serious request - I am not just window shopping. ;) Contact me off-list with offers. Thanks in advance! MikeG in Louisiana **Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15?ncid=aolhom000301) __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Wanted to Buy : Superb Pallasite!
Also, I have seen Fukang for good prices. My piece is over 2 years old with no rust. The olivine is stunning. I am curious of other pieces of Fukang rusting badly? Matt -- Matt Morgan Mile High Meteorites http://www.mhmeteorites.com P.O. Box 151293 Lakewood, CO 80215 USA -Original Message- From: [EMAIL PROTECTED] Date: Wed, 19 Mar 2008 16:52:18 To:[EMAIL PROTECTED], [EMAIL PROTECTED],meteorite-list@meteoritecentral.com Subject: Re: [meteorite-list] Wanted to Buy : Superb Pallasite! Hello Alex, You are forgetting another very nice pallasite: Quijingue, the Brazilian one. Lesser known, but just as pretty. So a good investment. In my opinion. Anne M. Black _www.IMPACTIKA.com_ (http://www.IMPACTIKA.com) [EMAIL PROTECTED] (mailto:[EMAIL PROTECTED]) Vice-President, I.M.C.A. Inc. _www.IMCA.cc_ (http://www.IMCA.cc) -Original Message- From: Alexander Seidel [EMAIL PROTECTED] To: Michael Gilmer [EMAIL PROTECTED]; meteorite-list@meteoritecentral.com Sent: Wed, 19 Mar 2008 2:12 pm Subject: Re: [meteorite-list] Wanted to Buy : Superb Pallasite! If money isn´t the most important key factor, I would suggest an ultrathin (!) slice of Esquel or Imilac, but if money counts, I would rather suggest an olivine-rich portion of thinly cut Seymchan. All of these are known to be quite stable against rusting over time. Glorieta could be another good choice in the lower cost ranges of widely available pallasites... Good luck, and happy Easter, Alex Berlin/Germany Original-Nachricht Datum: Wed, 19 Mar 2008 11:31:43 -0700 (PDT) Von: Michael Gilmer [EMAIL PROTECTED] An: meteorite-list@meteoritecentral.com Betreff: [meteorite-list] Wanted to Buy : Superb Pallasite! Greetings List! I'm having difficulty locating the right piece of Pallasite for a friend of mine who is ready to purchase. Exact type/fall is not the most important factor. What is most important is aesthetic beauty and the olivine crystals must be high quality - the piece should be like transparent stained glass when held in front of a light. I'd like something around 50mm X 40mm in size, or somewhere around that : no postage-stamp sized pieces please. I know this won't be cheap and this is a serious request - I am not just window shopping. ;) Contact me off-list with offers. Thanks in advance! MikeG in Louisiana **Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15?ncid=aolhom000301) __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteorite market trends - a critical note
On Wed, 19 Mar 2008 21:13:42 +0100, you wrote: Collecting is investing. Every collector wants to see the value of his collection stay sable at the least. Not me. I collect them because I want them, not because I hope to turn a profit for them in the future. I'd be very happy if every class of asteroid material became cheap and abundant enough that you would casually buy them by the ton and have them delivered by dump truck. If that means that the money I've already spent on meteorites would never be recovered, so what? I'm never going to recover the multiple thousands I've dumped into computer equipment over the years that is now so obsolete I'd have to pay a landfill to take them. I want the meteorite market to crash, hard, so that I can pick up the bargains. __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Wanted to Buy : Superb Pallasite!
My experience with Pallasites have been: I had a piece of Fukang deteriorate in a mere six months. Some of the crystals became dislodged while others bulged under the pressure of rust pushing them out. Keep in mind that I live in a moist state and only a few hundred feet from a salt water body named the Puget Sound. The only pallasites that I have possessed that hold up well under these conditions are Esquel, Glorieta and Seymchan. I once had a huge Brenham slice that was only held together by the lacquer used to make it look better. Stay away from meteorites that have lacquer coatings as it actually traps moisture in the piece. There is no substitute for a good polish which reduces surface area. Rough surfaces trap moisture. Some apply lacquer as a way to avoid the extra steps of a fine polish. Best Regards, Adam --- [EMAIL PROTECTED] wrote: Also, I have seen Fukang for good prices. My piece is over 2 years old with no rust. The olivine is stunning. I am curious of other pieces of Fukang rusting badly? Matt -- Matt Morgan Mile High Meteorites http://www.mhmeteorites.com P.O. Box 151293 Lakewood, CO 80215 USA -Original Message- From: [EMAIL PROTECTED] Date: Wed, 19 Mar 2008 16:52:18 To:[EMAIL PROTECTED], [EMAIL PROTECTED],meteorite-list@meteoritecentral.com Subject: Re: [meteorite-list] Wanted to Buy : Superb Pallasite! Hello Alex, You are forgetting another very nice pallasite: Quijingue, the Brazilian one. Lesser known, but just as pretty. So a good investment. In my opinion. Anne M. Black _www.IMPACTIKA.com_ (http://www.IMPACTIKA.com) [EMAIL PROTECTED] (mailto:[EMAIL PROTECTED]) Vice-President, I.M.C.A. Inc. _www.IMCA.cc_ (http://www.IMCA.cc) -Original Message- From: Alexander Seidel [EMAIL PROTECTED] To: Michael Gilmer [EMAIL PROTECTED]; meteorite-list@meteoritecentral.com Sent: Wed, 19 Mar 2008 2:12 pm Subject: Re: [meteorite-list] Wanted to Buy : Superb Pallasite! If money isn´t the most important key factor, I would suggest an ultrathin (!) slice of Esquel or Imilac, but if money counts, I would rather suggest an olivine-rich portion of thinly cut Seymchan. All of these are known to be quite stable against rusting over time. Glorieta could be another good choice in the lower cost ranges of widely available pallasites... Good luck, and happy Easter, Alex Berlin/Germany Original-Nachricht Datum: Wed, 19 Mar 2008 11:31:43 -0700 (PDT) Von: Michael Gilmer [EMAIL PROTECTED] An: meteorite-list@meteoritecentral.com Betreff: [meteorite-list] Wanted to Buy : Superb Pallasite! Greetings List! I'm having difficulty locating the right piece of Pallasite for a friend of mine who is ready to purchase. Exact type/fall is not the most important factor. What is most important is aesthetic beauty and the olivine crystals must be high quality - the piece should be like transparent stained glass when held in front of a light. I'd like something around 50mm X 40mm in size, or somewhere around that : no postage-stamp sized pieces please. I know this won't be cheap and this is a serious request - I am not just window shopping. ;) Contact me off-list with offers. Thanks in advance! MikeG in Louisiana **Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15?ncid=aolhom000301) __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Wanted to Buy : Superb Pallasite!
I agree with Adam, I have had bad luck with Fukang too. Maybe it wasn't prepared correctly. And sorry Mike, but I have always Quijingue in stock, I have only bought pieces with nice bright crystals (take a look at my catalog), and I have had no rust problems with that one. Of course I am further from the ocean than Adam, but Colorado is not as dry as Arizona. Anne M. Black _www.IMPACTIKA.com_ (http://www.IMPACTIKA.com) [EMAIL PROTECTED] (mailto:[EMAIL PROTECTED]) Vice-President, I.M.C.A. Inc. _www.IMCA.cc_ (http://www.IMCA.cc) -- --- My experience with Pallasites have been: I had a piece of Fukang deteriorate in a mere six months. Some of the crystals became dislodged while others bulged under the pressure of rust pushing them out. Keep in mind that I live in a moist state and only a few hundred feet from a salt water body named the Puget Sound. The only pallasites that I have possessed that hold up well under these conditions are Esquel, Glorieta and Seymchan. I once had a huge Brenham slice that was only held together by the lacquer used to make it look better. Stay away from meteorites that have lacquer coatings as it actually traps moisture in the piece. There is no substitute for a good polish which reduces surface area. Rough surfaces trap moisture. Some apply lacquer as a way to avoid the extra steps of a fine polish. Best Regards, Adam --- [EMAIL PROTECTED] wrote: Also, I have seen Fukang for good prices. My piece is over 2 years old with no rust. The olivine is stunning. I am curious of other pieces of Fukang rusting badly? Matt -- **Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15?ncid=aolhom000301) __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Wanted to Buy: Superb Pallasite!
Anne writes: I have had bad luck with Fukang too. Even though my Fukang still looks stable - I got it in 2006 - my vote is for Esquel. I have a very thin (ca. 1-2 mm) slice with translucent olivines that I got from Gregor Pacer about 10 years ago...not the slightest trace of rust! I also have a 7 mm-thick slice of Esquel ... not a trace a rust either. Maybe it wasn't prepared correctly. ..and, maybe that's once again the magic word correct preparation. I have always Quijingue in stock, ... and I have had no rust problems When I got a small piece of Quijingue from AL in 2002, someone warned me about it being a severe ruster. It is still as stable and looks exactly as it did six years ago! Best pre-Easter Wishes, Bernd __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] MRO HiRISE Images - March 19, 2008
MARS RECONNAISSANCE ORBITER HIRISE IMAGES March 19, 2008 o Yardangs in Tithonium Chasma http://hirise.lpl.arizona.edu/PSP_007417_1755 o Layered Bedrock with Possible Hydrated Sulfates http://hirise.lpl.arizona.edu/PSP_007403_1670 o Inverted Fluvial Channels and Craters with Ejecta Rays http://hirise.lpl.arizona.edu/PSP_007394_1750 o Layered Bedrock in Walls of Ganges Mensa http://hirise.lpl.arizona.edu/PSP_007376_1725 All of the HiRISE images are archived here: http://hirise.lpl.arizona.edu/ Information about the Mars Reconnaissance Orbiter is online at http://www.nasa.gov/mro. The mission is managed by NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology, for the NASA Science Mission Directorate, Washington, D.C. Lockheed Martin Space Systems, of Denver, is the prime contractor and built the spacecraft. HiRISE is operated by the University of Arizona. Ball Aerospace and Technologies Corp., of Boulder, Colo., built the HiRISE instrument. __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] nwa 3161
Hi list.With all the great auctions that greg hupe is putting up,I saw one that really caught my eye.It is NWA 3161.I love how greg gives us the chance to buy things right away so we do not have to wait for the whole auction to end.I decided to use the buy it now and buy the 15 gram slice.It is a beautifull LL3.7 that reminds me of it looking like the CHODRULE CONGLOMERATE from a few years ago.The chondrules are very colorful and some of the slices have really nice black and semi-dark inclusions.You would do yourself good by getting a piece of this.It is a great meteorite just to look at.Thanks greg.I look forward to my slice. Steve R.Arnold,chicago,Ill,Usa!! The Asteroid Belt! http://chicagometeorites.net/ Collecting Meteorites since 06/19/1999 Ebay I.D. Illinoismeteorites Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteorite market trends - a critical note
Ditto, ditto and ditto. Jerry Flaherty - Original Message - From: Darren Garrison [EMAIL PROTECTED] To: Meteorite-list@meteoritecentral.com Sent: Wednesday, March 19, 2008 6:24 PM Subject: Re: [meteorite-list] Meteorite market trends - a critical note On Wed, 19 Mar 2008 21:13:42 +0100, you wrote: Collecting is investing. Every collector wants to see the value of his collection stay sable at the least. Not me. I collect them because I want them, not because I hope to turn a profit for them in the future. I'd be very happy if every class of asteroid material became cheap and abundant enough that you would casually buy them by the ton and have them delivered by dump truck. If that means that the money I've already spent on meteorites would never be recovered, so what? I'm never going to recover the multiple thousands I've dumped into computer equipment over the years that is now so obsolete I'd have to pay a landfill to take them. I want the meteorite market to crash, hard, so that I can pick up the bargains. __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteorite market trends - a critical note
Agreed. -Walter Branch - Original Message - From: Jerry [EMAIL PROTECTED] To: [EMAIL PROTECTED]; Meteorite-list@meteoritecentral.com Sent: Wednesday, March 19, 2008 8:34 PM Subject: Re: [meteorite-list] Meteorite market trends - a critical note Ditto, ditto and ditto. Jerry Flaherty - Original Message - From: Darren Garrison [EMAIL PROTECTED] To: Meteorite-list@meteoritecentral.com Sent: Wednesday, March 19, 2008 6:24 PM Subject: Re: [meteorite-list] Meteorite market trends - a critical note On Wed, 19 Mar 2008 21:13:42 +0100, you wrote: Collecting is investing. Every collector wants to see the value of his collection stay sable at the least. Not me. I collect them because I want them, not because I hope to turn a profit for them in the future. I'd be very happy if every class of asteroid material became cheap and abundant enough that you would casually buy them by the ton and have them delivered by dump truck. If that means that the money I've already spent on meteorites would never be recovered, so what? I'm never going to recover the multiple thousands I've dumped into computer equipment over the years that is now so obsolete I'd have to pay a landfill to take them. I want the meteorite market to crash, hard, so that I can pick up the bargains. __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] OT: live broadcast in HD from the Space Station on Discovery HD right now - 745pm PDT
Good Evening! There's a live broadcast in HD from the Space Station on Discovery HD right now ... very cool! Regards, Art __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Further thoughts
Hi mexicodoug, et al, Does anyone have evidence of what really happens (i.e. explode or fragment) with meteors/meteoroids that pass through the atmosphere? I'm a newbie and therefore not pretending to know what I'm talking about, but it would seem to me that there are some meteors/meteroids that COULD have gases trapped in their molecular structure that COULD heat up and actually explode during their fiery passage through our atmosphere. Large meteors wouldn't do this because their internal temperatures never increase at all (they are still as cold as the space environment where they have been traveling for eons), but small friable meteors like Carancas could possibly have gases in them that could heat up and therefore explode in our atmosphere. That is just a guess, not a fact, so please no flames. ;-) I'm just trying to get these ideas out of my head and get some explanations for them. Alcohol doesn't stop the voices, it just s l o w s t h e md o w n . . . :-) Regards, Bob -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Wednesday, March 19, 2008 10:08 AM To: [EMAIL PROTECTED]; Meteorite-list@meteoritecentral.com Subject: Re: [meteorite-list] Further thoughts Pete wrote: Some will be blown up and some will be blown down. I believe this is a common misconception for many in the meteorite community and common thought. I don't think anything is blowing up. Simply fragmenting. Each part of the original whole maintains its portion of momentum upon fragmentation. The direction of the momentum is along the angle of entry. There is no blowing up in that sense of a bomb which propells fragments in all directions as there is no internal source of energy (like in a chemical explosive). The only dispersion will be caused by different frictional (aerodynamic effects) deviations like sticking your hand out the car window and using yourwrist as an aileron. If your fingers fell off your hand, there would be no explosion, and nothing being blown forward either :-) Best health, Doug sorry - now caught up with the good replies on this topic, we just got electricity internet, etc. back after the nuclear winter our city experienced yesterday where we couldn't see the Sun on a clear day -Original Message- From: Pete Shugar [EMAIL PROTECTED] To: Meteorite-list@meteoritecentral.com Sent: Wed, 19 Mar 2008 10:45 am Subject: [meteorite-list] Further thoughts Consider the Fireball. When the (soon to be) meteorite explodes into a fireball, the pieces are blown in every direction, Those blown in the direction that the meteor came from which should give them a negative speed and as such will start to drop first. Those in the direction of travel give the furtherest reach from the above mentioned pieces. This will define the outside distance of the strewnfield. Some will be blown up and some will be blown down. I would suspect that those that are blown downward would be the first to reach ground as these will be accelarated and those that are blown upward must go up before they can come down, so they should be the last to reach the ground. This means that the middle of the strewnfield is the first to be populated as well as the last to be populated. The two ends fill up in between the first and last parts of the fall. Anyone care to check? I don't think I missed anything, but I'm not an EXPERT, just using deductive reasoning. Pete __ http://www.meteoritecentral.com Meteorite-list mailing list [EMAIL PROTECTED] http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Further thoughts
Hi Bob- Even small meteoroids don't heat up inside during their brief meteor phase. Ablation is simply too efficient at carrying away heat. Also, it's doubtful any significant gas pockets exist in meteoroids. There are quite a few videos of meteors breaking up, and they don't seem to show anything like true explosions. I've recorded perhaps 100 events bright enough to show fragmentation, and the fragments always appear to continue along substantially the same path. BTW, the space environment isn't particularly cold. The interior of meteoroids varies from tens of degrees below freezing to tens of degrees above. Chris * Chris L Peterson Cloudbait Observatory http://www.cloudbait.com - Original Message - From: Bob Loeffler [EMAIL PROTECTED] To: Meteorite-list@meteoritecentral.com Sent: Wednesday, March 19, 2008 11:42 PM Subject: Re: [meteorite-list] Further thoughts Hi mexicodoug, et al, Does anyone have evidence of what really happens (i.e. explode or fragment) with meteors/meteoroids that pass through the atmosphere? I'm a newbie and therefore not pretending to know what I'm talking about, but it would seem to me that there are some meteors/meteroids that COULD have gases trapped in their molecular structure that COULD heat up and actually explode during their fiery passage through our atmosphere. Large meteors wouldn't do this because their internal temperatures never increase at all (they are still as cold as the space environment where they have been traveling for eons), but small friable meteors like Carancas could possibly have gases in them that could heat up and therefore explode in our atmosphere. That is just a guess, not a fact, so please no flames. ;-) I'm just trying to get these ideas out of my head and get some explanations for them. __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
