Re: [meteorite-list] Ontario Meteor over 200 reports
Dear List, Just curious... This meteor fireball passed at approx 22:00 hrs on 6/14/12. There was also a near-earth astroid 2012LZ1 (nearly a city block wide) that was supposed to pass by at approx 23:00 hrs on 6/14/12. Could this have been a co-traveler (stragler) with the 2012LZ1 main mass? Any relation? Anybody know? Jonathan - Original Message - From: drtanuki drtan...@yahoo.com To: meteorite-list@meteoritecentral.com Sent: Thursday, June 14, 2012 9:31 PM Subject: [meteorite-list] Ontario Meteor over 200 reports Dear List, This event was seen by hundreds. Breaking News -MBIQ Detects Ontario, Canada Meteor Fireball 14JUN2012 Breaking Meteor News - MBIQ Detects Ontario, Canada Meteor Fireball ~21:54 14JUN2012 http://thelatestworldwidemeteorreports.blogspot.com/ http://lunarmeteoritehunters.blogspot.com/ Dirk Ross...Tokyo __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] meteorite or not?
M22protosun, Did the same thing when I began collecting. Bought several, sold as: iron/nickel meterites : ^ ( Question. How did you track the source to Mekong River? Jonathan ICMA 3922 - Original Message - From: m42protosun m42proto...@t-online.de To: Meteorite-list@meteoritecentral.com Sent: Wednesday, July 13, 2011 6:25 AM Subject: Re: [meteorite-list] meteorite or not? Hi list, when I started collecting meteorites I had bought such item fron an IMCA member as NANTAN. The reality is that it is Mekong River Iron . The simple negative Ni-Test shows that it contain not yet more than 0.1 ppm Ni metal, a MUST of iron containing meteorites. m42protosun -Original-Nachricht- Subject: [meteorite-list] meteorite or not? Date: Wed, 13 Jul 2011 08:05:33 +0200 From: Dan Furlan danfur...@gmail.com To: met-list meteorite-list@meteoritecentral.com I'm not 100% sure but i don't think this item on ebay is a meteorite 120738890611 link to item: http://cgi.ebay.ca/2-6LB-Original-Iron-Meteorite-Specimen-China-/120738890611?pt=LH_DefaultDomain_0hash=item1c1c994373 __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list Postfach fast voll? Jetzt kostenlos E-Mail Adresse @t-online.de sichern und endlich Platz für tausende Mails haben. http://www.t-online.de/email-kostenlos __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] meteorite or not?
Guess I should have Googled it. - Original Message - From: JoshuaTreeMuseum joshuatreemus...@embarqmail.com To: meteorite-list@meteoritecentral.com Sent: Wednesday, July 13, 2011 5:40 PM Subject: [meteorite-list] meteorite or not? Richard, Good one! I thought most of the Mekong Delta material was hematite. Phil Whitmer JonathanI think one paddles upstream. :)) __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Scam Artist - Joel Samson -FakeLunar Meteorites
Al, I have purchased specimens from Todd over several years now. I am looking at some of these as I write this, which he personally found in the Whetstone Mountains, and in the Buck Mountains, of Arizona. And which, are unquestionably authentic SOMEONE HAS MADE A HUGE MISTAKE HERE, and should retract their error. Jonathan Dongell ICMA 3922 - Original Message - From: Dave Gheesling d...@fallingrocks.com To: 'Don Merchant' dmerc...@rochester.rr.com; 'al mitt' alm...@kconline.com; Meteorite-list@meteoritecentral.com Cc: 'Chris Spratt' cspr...@islandnet.com Sent: Thursday, May 12, 2011 6:59 PM Subject: Re: [meteorite-list] Scam Artist - Joel Samson -FakeLunar Meteorites Thanks again, Frank, for forwarding my below note earlier today when I was on a web interface and couldn't directly post to the list. Since the scam and fraud notion is still being floated with Todd's name on it, I'm posting again directly here so it's at least in the archives. Apologies for the redundancy... Hello List, While I haven't seen where Todd Parker's name was mentioned as a possible scammer other than in Al Mitterling's recent post (I haven't been closely following the thread), TODD PARKER MOST ASSUREDLY IS NOT A SCAMMER OR ANYTHING OF THE SORT. To the contrary, Todd is probably one of the finest people I've had the pleasure of knowing -- inside or outside of the meteorite community. Presumably this mention has something to do with the recent Mifflin thread, but Todd's name shouldn't be associated with anything other than integrity -- he is a class act, to be sure. All the best, Dave www.fallingrocks.com -Original Message- From: meteorite-list-boun...@meteoritecentral.com [mailto:meteorite-list-boun...@meteoritecentral.com] On Behalf Of Don Merchant Sent: Thursday, May 12, 2011 8:06 PM To: al mitt; Meteorite-list@meteoritecentral.com Cc: Chris Spratt Subject: Re: [meteorite-list] Scam Artist - Joel Samson -FakeLunar Meteorites Hi Al and the rest of the List. I agree totally with you Al. One thing as you mentioned that I have noticed over the years is that there is that chance someone can get hurt by accusations of fraud ect. Yet how can this be done so as to avoid this? I have an idea that might work but may need refining. Maybe we can ask the List for 2 or 3 volunteers who 1) Has been a Listie of good and long standing. 2) Has built an excellent reputation of their name in the meteorite community, which includes experience with buying and selling meteorites, with knowledge of meteorite composition both internal and external. 3) Last but not least, always desired to be a CSI and so a great opportunity to be an MFI or Meteorite Fraud Investigator. I myself like MFS Meteorite Fraud Squasher! Anyways...The List could vote 2 or 3 MFI's that have an interest. How this vote could be doneI don't know, but I am sure with all the brilliant minds that this List has, that a great suggestion is out there. These would be the people that the rest of the List would contact (via another email) when a fraudulent situation takes place. Now the rest of the List is not exposed to any allegation. The MFI's would research the history of the suspected Dealer/Seller in a fair timely fashion and communicate with the other 2 MFI's of their findings. Finally if the situation is found to NOT be fraudulent, the MFI's need only contact the person that thought fraud was taking place and explain their findings. Now all is calm on the List. If however the findings show fraud (several very strong circumstantial evidences could warrant fraud) Then the MFI's could officially announce this to the List! Though the IMCA does something similar, not everyone on this List is a Member of the IMCA. It would be beneficial anyways, in having 2 entities helping to combat the destruction of our collections and reputations as meteorite collectors, sellers, dealers, and hunters, especially since the Meteorite Central List doesn't appear to be going away for a very long time if ever. Maybe a bi-monthly or monthly email to the entire List as a reminder of who to contact (MFI's) if fraud is suspected. We need to all watch our backs. It will only get worse. Lets not allow differences between dealers and or mistakes stand in the way but rather concentrate on the benefit for all of us, to rid of this pandemic air borne disease of meteorite fraud. This hurts every single collector on this List, whether I like you or you don't like me bla bla bla...the bottom line is we have a common interest and that is the love of this great hobby. Lets protect it. Just my 2 cents is all. I know it sounds silly, but the bottom line is Al is right, and somehow we need to stomp out these greedy meteorite flea fakes! Say that 3 times fast! It's FAKES not FLAKES lol Sincerely Don Merchant Founder-Cosmic Treasures Celestial Wonders http://www.ctreasurescwonders.com/index.html IMCA #0960 - Original Message - From: al mitt alm...@kconline.com To:
Re: [meteorite-list] Color of OC's by Staining or by Trace Elements
Greg, Guess I owe you a milkshake I thought you were asking what type of environment (i.e. from an external source) might cause a stoney to change color over time. In other words, to cause redoximorphic features. We see this a lot in my line of work. So, I assume it must happen to stoneys as well, over time. I did not understand you were asking about existing-material colorations. MY BAD : o ( May I recommend Cold Stone or Baskin Robbins. : o } Jon Dongell ICMA 3922 - Original Message - From: Michael Gilmer meteoritem...@gmail.com To: Thunder Stone stanleygr...@hotmail.com Cc: meteorite-list@meteoritecentral.com Sent: Wednesday, March 30, 2011 9:20 AM Subject: Re: [meteorite-list] Color of OC's by Staining or by Trace Elements Hi Greg and List, Great question Greg. I'm curious to hear what the experts have to say. Some OC's start out as white or light-grey - like some LL6 types. That is why some LL6 meteorites are mistaken for lunars or eucrites - because they lack chondrules and have that whitish color. Best regards, MikeG -- Mike Gilmer - Galactic Stone Ironworks Meteorites Website - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone News Feed - http://www.galactic-stone.com/rss/126516 Twitter - http://twitter.com/galacticstone EOM - http://www.encyclopedia-of-meteorites.com/collection.aspx?id=1564 --- On 3/30/11, Thunder Stone stanleygr...@hotmail.com wrote: Hi List: I hope everyone is well. I have a question regarding the 'color' of OC's through staining by some mineral influx or by oxidation. It appears most fresh OC's start out as a light beige or tan color; then through time the metal rusts and they often turn yellowish, orange, or brownish - this make sense. My questions is this: What other colors can they become, blue or green? What element(s) result in different colors? What different weathering processes are involved? The reason I ask is because I have a weathered meteorite that is dark green in color; it looks like jade and I have not seen any like this one before. I have also and seen OC's with a 'black' color, what causes that? Thanks, Greg S. __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list -- __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Color of OC's by Staining or by Trace Elements
I'll bet a chocolate milkshake : o ) you are seeing manganese (or Mn-Fe combo) weathering. EDS can verify this. Jonathan ICMA 3922 - Original Message - From: Thunder Stone stanleygr...@hotmail.com To: meteorite-list@meteoritecentral.com Sent: Wednesday, March 30, 2011 9:11 AM Subject: [meteorite-list] Color of OC's by Staining or by Trace Elements Hi List: I hope everyone is well. I have a question regarding the 'color' of OC's through staining by some mineral influx or by oxidation. It appears most fresh OC's start out as a light beige or tan color; then through time the metal rusts and they often turn yellowish, orange, or brownish - this make sense. My questions is this: What other colors can they become, blue or green? What element(s) result in different colors? What different weathering processes are involved? The reason I ask is because I have a weathered meteorite that is dark green in color; it looks like jade and I have not seen any like this one before. I have also and seen OC's with a 'black' color, what causes that? Thanks, Greg S. __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Color of OC's by Staining or by Trace Elements
Oops. I left the word sulfide out of my response (see below) I'll bet a chocolate milkshake : o ) you are seeing manganese (or Mn-Fe combo) SULFIDE weathering. EDS can verify this. Jonathan ICMA 3922 - Original Message - From: Jonathan E. Dongell jdong...@cox.net To: Thunder Stone stanleygr...@hotmail.com; meteorite-list@meteoritecentral.com Sent: Wednesday, March 30, 2011 6:03 PM Subject: Re: [meteorite-list] Color of OC's by Staining or by Trace Elements I'll bet a chocolate milkshake : o ) you are seeing manganese (or Mn-Fe combo) weathering. EDS can verify this. Jonathan ICMA 3922 - Original Message - From: Thunder Stone stanleygr...@hotmail.com To: meteorite-list@meteoritecentral.com Sent: Wednesday, March 30, 2011 9:11 AM Subject: [meteorite-list] Color of OC's by Staining or by Trace Elements Hi List: I hope everyone is well. I have a question regarding the 'color' of OC's through staining by some mineral influx or by oxidation. It appears most fresh OC's start out as a light beige or tan color; then through time the metal rusts and they often turn yellowish, orange, or brownish - this make sense. My questions is this: What other colors can they become, blue or green? What element(s) result in different colors? What different weathering processes are involved? The reason I ask is because I have a weathered meteorite that is dark green in color; it looks like jade and I have not seen any like this one before. I have also and seen OC's with a 'black' color, what causes that? Thanks, Greg S. __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] A Survey for Collectors
Question #1: I agree with the others, but I would add SIZE. All collectors are different, but most have some idea of what they want (specimen size) in their collections, or at least, what they will settle on. At some point, specimens simply become impractical, to the average collector (too small - too big). Faced with a choice, I believe that most collectors want to expand their collection by variety foremost, and optionally trade-up in size later. Size also entails (in my opinion) everything from micro's (thin sections), slices, fragments, complete specimens, main masses, etc..., which is another aspect of what/how some collect. Question #2: I have noticed that each of these (mentioned in your question) establish their own market value somewhat different from the other. Add to this; the state-of-the-economy, the buyer/seller motivation, and each of these markets can vary. You seem to have covered them all, but each is significantly different to me... Add to this, the 'hunting/collecting' aspect, and the 'trading' aspect, and it all becomes a big part of what makes collecting meteorites so exciting. Question #3: No Comment Question #4: I agree with Jim Wooddell's comments... Under-valued (in general) ... Question # 5: Low to medium TKW's will continue to rise ($/g) without resistance. Jonathan Dongelll 3922 - Original Message - From: actionshoot...@carolina.rr.com To: meteorite-list@meteoritecentral.com; mars...@gmail.com; Thunder Stone stanleygr...@hotmail.com Sent: Monday, February 21, 2011 12:37 PM Subject: Re: [meteorite-list] A Survey for Collectors Question #1 - Rarity, freshness, uniqueness, aesthetics - in that order Question #2 - Dealers based on what the market will bear and that gotta have factor. Question #3 - I would say Achondrites due to their variations and uniqueness. CC's also for their possible life connection. Question #4 - I think most are extremely overpriced. They are unique and I feel people cash in on that. Question #5 - I agree with the previous answer that Lunar and Martian meteorites will retain their value the best along with pallasites, perhaps Angrite's value will increase if they are proven to be from Mercury. Thunder Stone stanleygr...@hotmail.com wrote: Question #1 - Rarety, uniqness and aesthetics - in that order Question #2 - I would say dealer websites are the starting point Question #3 - I would say CV's, CO's and CK's, I see the most growth in CC's as there as the facination with them containing carbon and the possible like to life Question #4 - I think some are extreamly overvalued - falls for one. Also, a whethered OC has little value at all... there is a very wide range. Question #5 - I think the Lunars and Martian meteorites will retain their value the best, perhaps Angrite's value will increase if they are prooven to be from Mercury Greg S. Date: Mon, 21 Feb 2011 11:14:30 -0600 From: mars...@gmail.com To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] A Survey for Collectors Discovering my sale of The 2011 Global Meteorite Price Report on eBay, a journalist for a major international magazine now seeks my opinion of how we value the specimens in our collections. I think there are many other folks on the m-list who could help me clarify my thoughts before I respond. Please feel free to respond as succinctly and in as few words as possible to any or all of the questions below. If you do not want your name, rank and serial number to appear attached to your opinion please indicate so in your response to the m-list (or privately to me), otherwise you may end up with your name in an international periodical. Thanks to all for their thoughtful responses. - Kevin 1. What are the most important factors in terms of collectability for a given specimen? Would you emphasize the rarity, the science, the history, the freshness, the aesthetics, or...? 2. Who or what establishes market value? Are meteorite prices being established at auction, in Tucson, on dealer websites, in Morocco, on eBay, in private trades...? 3. What are the most undervalued meteorites or categories of meteorite? In what categories do you see the most potential for growth? 4. Do you believe that meteorites are undervalued or overvalued overall, in comparison to other collectibles such as fossils or coins or wristwatches or contemporary art? 5. What long-term meteorite market developments would you be willing to forecast? Kevin Kichinka Tambor de Alajuela www.theartofcollectingmeteorites.com www.LaQ-CostaRica.com __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at
Re: [meteorite-list] Meteorites 101
Barrett, So is the Asteroid Belt actually; a Meteriod Belt, an Asteriod Belt, or a Satellite Belt ? ;~} Jonathan - Original Message - From: Barrett barret...@comcast.net To: Meteorite-list@meteoritecentral.com Sent: Saturday, January 15, 2011 5:29 PM Subject: [meteorite-list] Meteorites 101 The definitive source WIKIPEDIA!! Says; MeteoroidThe current official definition of a meteoroid from the International Astronomical Union is a solid object moving in interplanetary space, of a size considerably smaller than an asteroid and considerably larger than an atom.[1][2] Beech and Steel, writing in Quarterly Journal of the Royal Astronomical Society, proposed a new definition where a meteoroid is between 100 µm and 10 m across.[3] The NEO definition includes larger objects, up to 50 m in diameter, in this category. Very small meteoroids are known as micrometeoroids (see also interplanetary dust). The composition of meteoroids can be determined as they pass through Earth's atmosphere from their trajectories and the light spectra of the resulting meteor. Their effects on radio signals also give information, especially useful for daytime meteors which are otherwise very difficult to observe. From these trajectory measurements, meteoroids have been found to have many different orbits, some clustering in streams (see Meteor showers) often associated with a parent comet, others apparently sporadic. Debris from meteoroid streams may eventually be scattered into other orbits. The light spectra, combined with trajectory and light curve measurements, have yielded various compositions and densities, ranging from fragile snowball-like objects with density about a quarter that of ice,[4] to nickel-iron rich dense rocks. Meteoroids travel around the Sun in a variety of orbits and at various velocities. The fastest ones move at about 26 miles per second (42 kilometers per second) through space in the vicinity of Earth's orbit. The Earth travels at about 18 miles per second (29 kilometers per second). Thus, when meteoroids meet the Earth's atmosphere head-on (which would only occur if the meteors were in a retrograde orbit), the combined speed may reach about 44 miles per second (71 kilometers per second). MeteorMeteor and Meteors redirect here. For other uses, see Meteor (disambiguation). See also Hydrometeor. Comet 17P/Holmes and GeminidA meteor is the visible path of a meteoroid that has entered the Earth's atmosphere. Meteors typically occur in the mesosphere, and most range in altitude from 75 km to 100 km.[5] Millions of meteors occur in the Earth's atmosphere every day. Most meteoroids that cause meteors are about the size of a pebble. They become visible between about 40 and 75 miles (65 and 120 kilometers) above the Earth. They disintegrate at altitudes of 30 to 60 miles (50 to 95 kilometers). Meteors have roughly a fifty percent chance of a daylight (or near daylight) collision with the Earth as the Earth orbits in the direction of roughly west at noon.[clarification needed] Most meteors are, however, observed at night as low light conditions allow fainter meteors to be observed. For bodies with a size scale larger than the atmospheric mean free path (10 cm to several metres)[clarification needed] the visibility is due to the atmospheric ram pressure (not friction) that heats the meteoroid so that it glows and creates a shining trail of gases and melted meteoroid particles. The gases include vaporized meteoroid material and atmospheric gases that heat up when the meteoroid passes through the atmosphere. Most meteors glow for about a second. A relatively small percentage of meteoroids hit the Earth's atmosphere and then pass out again: these are termed Earth-grazing fireballs (for example The Great Daylight 1972 Fireball). Meteors may occur in showers, which arise when the Earth passes through a trail of debris left by a comet, or as random or sporadic meteors, not associated with a specific single cause. A number of specific meteors have been observed, largely by members of the public and largely by accident, but with enough detail that orbits of the incoming meteors or meteorites have been calculated. All of them came from orbits from the vicinity of the asteroid belt.[6] FireballA fireball is a brighter-than-usual meteor. The International Astronomical Union defines a fireball as a meteor brighter than any of the planets (magnitude -4 or greater).[7] The International Meteor Organization (an amateur organization that studies meteors) has a more rigid definition. It defines a fireball as a meteor that would have a magnitude of -3 or brighter if seen at zenith. This definition corrects for the greater distance between an observer and a meteor near the horizon. For example, a meteor of magnitude -1 at 5 degrees above the horizon would be classified as a fireball because if the observer had been directly below the meteor it
Re: [meteorite-list] List of known Rusters?
Hi Ed, The wax idea sounds good. Keeps the water out, but still breathes (lets oxygen in and out). Have you thought about microcrystalline wax, instead of clear paste floor wax? Try a company like 'Clarus Specialty Products' or 'Caromex International'. Ask for a microcrystalline wax that melts easy at, or below, 175 C ( ~ 350 F) and that has a good penetration grade. As it cools to ~ 100 C (200 F) take it out, and rag it off You are good to go... If you have excess in some wax in certain tough areas, you can just torch it out or simply re-bake it. Try it on something small Let me know what you think... In the Great White North, you might try WITCO Canada (814-368-6111) You might try their Witco 180 M Microwax... Or, see what they recommend : ^ / Good Luck Jonathan - Original Message - From: Ed Majden epmaj...@shaw.ca To: Jonathan E. Dongell jdong...@cox.net Cc: meteorite-list@meteoritecentral.com Sent: Wednesday, December 08, 2010 9:33 AM Subject: Re: [meteorite-list] List of known Rusters? Hi Jonathan: I did a search for D96 Gun Oil on the internet. I contacted the supplier of this product and he says they will not ship small amounts to Canada. He referred me to some Canadian Dealers but they did not reply to my e- mails. Perhaps they don't stock the stuff anymore. Shipping stuff like this across the border can be problematic and also costly. I phoned a gun collector friend of mine and he says they don't use gun oil anymore, just cloth impregnated wipes. He says in our cold climate when hunting seasons are open gun oils tend to gum things up. He suggested using clear paste wax, auto or floor types. I wonder if anyone has tried this? This may be worth a try! Cheers: Ed From very WET Vancouver Island! On 7-Dec-10, at 10:59 PM, Jonathan E. Dongell wrote: Ed, I will sometimes use WD40 on previously treated/preserved irons, as a twice-a-year cleaner/sealer as a rub-down with a clean towel. But, I always heat my specimens to ~ 400 F for ~ 20 minutes, prior to every application (let them cool first... ouch...). I have noticed two things when using WD40 on my specimens: 1. it appears to be, at best, only a temporary rust retardant. 2. it does not behave as a 100% water-repellant oil-based product does; in fact, it can (in my opinion) emulsify with water/moisture in the specimen, due to the aliphatic component and/or the wetting agent used in WD40. The later # 2, is why I always insist on heating specimens that receive WD40. You must remove any moisture from within your specimen, or you will risk continued degradation of your specimen BENEATH THE SURFACE over time (in my opinion). The only other reason I might use WD40 is a personal preference. It gives certain irons a slightly darker, almost black-iron oxide or 'fusion-crust' tone or coloration (instead of a shiny, or a gun metal blue, or etc...) with continued usage. However, this same look, is why some collectors DON'T like to use WD40. That said, I would never use WD40 on a severe ruster. There are much better products (many have already been named on this listing) for retarding rust. But, NEVER apply any of these products (in my opinion) to a specimen (especially a 'severe ruster') until you: 1. remove as much of the alkalis and/or salts as is possible from specimen 2. remove as much ferric oxide as is possible, or convert as much ferric oxide to ferrous oxide (via chemical or electrico-chemical treatment) as is possible 3. apply either a chemical or an electrico-chemical treatment process to stabilize other minerals/metals (when necessary). 4. remove as much (better yet, all) moisture as is possible from specimen. ONLY THEN should you apply your rust prevention product of choice. Remember, these specimens are rusting for a reason. Most severe rusters have come from severe (sometimes anaerobic) environments. You must remove all the above rust 'contributing causes' prior to sealing any of these types of specimen (my opinion). Skipping any of the above steps, and applying a rust preventative, will surely lock in these potential 'rust mechanisms' within your specimen, which in fact, will create a more corrosive condition, and hasten the demise of your specimens. One last note... I continue to waiver on this one... Whether it is nobler to preserve the original specimen's as is qualities, or is it nobler still, to preserve the specimen from deteriorating away, thus altering forever, the as is quality. Alas, there is the rub. Just my opinions... Best of Luck ;} Jonathan Dongell IMCA 3922 - Original Message - From: Ed Majden epmaj...@shaw.ca To: meteorite-list@meteoritecentral.com Sent: Monday, December 06, 2010 9:28 AM Subject: [meteorite-list] List of known Rusters? Does anyone have a list of known Iron meteorite rusters? The sample of Nantan China I have split into several pieces. I have been using WD40 on the pieces
[meteorite-list] Campo del Cielo, Las Palmas, Aruacu. Same or different
All, I am sure this one has been already been answered; if so, please send me to good source (hopefully difinitive) that I might educate myself. There seems to be conflicting 'reads' on these two meteorites: Campo del Cielo, Argentina Las Palmas, Argentina Are they possibly from the same fall, or not. Jonathan Dongell ICMA 3922 __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] List of known Rusters?
Ed, I will sometimes use WD40 on previously treated/preserved irons, as a twice-a-year cleaner/sealer as a rub-down with a clean towel. But, I always heat my specimens to ~ 400 F for ~ 20 minutes, prior to every application (let them cool first... ouch...). I have noticed two things when using WD40 on my specimens: 1. it appears to be, at best, only a temporary rust retardant. 2. it does not behave as a 100% water-repellant oil-based product does; in fact, it can (in my opinion) emulsify with water/moisture in the specimen, due to the aliphatic component and/or the wetting agent used in WD40. The later # 2, is why I always insist on heating specimens that receive WD40. You must remove any moisture from within your specimen, or you will risk continued degradation of your specimen BENEATH THE SURFACE over time (in my opinion). The only other reason I might use WD40 is a personal preference. It gives certain irons a slightly darker, almost black-iron oxide or 'fusion-crust' tone or coloration (instead of a shiny, or a gun metal blue, or etc...) with continued usage. However, this same look, is why some collectors DON'T like to use WD40. That said, I would never use WD40 on a severe ruster. There are much better products (many have already been named on this listing) for retarding rust. But, NEVER apply any of these products (in my opinion) to a specimen (especially a 'severe ruster') until you: 1. remove as much of the alkalis and/or salts as is possible from specimen 2. remove as much ferric oxide as is possible, or convert as much ferric oxide to ferrous oxide (via chemical or electrico-chemical treatment) as is possible 3. apply either a chemical or an electrico-chemical treatment process to stabilize other minerals/metals (when necessary). 4. remove as much (better yet, all) moisture as is possible from specimen. ONLY THEN should you apply your rust prevention product of choice. Remember, these specimens are rusting for a reason. Most severe rusters have come from severe (sometimes anaerobic) environments. You must remove all the above rust 'contributing causes' prior to sealing any of these types of specimen (my opinion). Skipping any of the above steps, and applying a rust preventative, will surely lock in these potential 'rust mechanisms' within your specimen, which in fact, will create a more corrosive condition, and hasten the demise of your specimens. One last note... I continue to waiver on this one... Whether it is nobler to preserve the original specimen's as is qualities, or is it nobler still, to preserve the specimen from deteriorating away, thus altering forever, the as is quality. Alas, there is the rub. Just my opinions... Best of Luck ;} Jonathan Dongell IMCA 3922 - Original Message - From: Ed Majden epmaj...@shaw.ca To: meteorite-list@meteoritecentral.com Sent: Monday, December 06, 2010 9:28 AM Subject: [meteorite-list] List of known Rusters? Does anyone have a list of known Iron meteorite rusters? The sample of Nantan China I have split into several pieces. I have been using WD40 on the pieces to retard further problems but this does not work all that well. Have to repeat this every few weeks! Ed Majden Courtenay B.C. Asteroid Majden 142368 (Thanks to Rob Matson) __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] sulphurous smell of meteorites (was Temperature ofmeteorites)
All, Is would seem logical (assuming the story is true) that if a dog can find a meteorite in the middle of a large field in West, Texas; and further, find that same stone to be 'unusual' enough (i.e. maybe sulfur-stinky???) to carry it back to his owner's front porch, its not because the stone is pretty There must be some smell associated with that rock??? If that dog is anything like ours, it could sniff out a cookie a mile away : - ) What do you think??? Jonathan Dongell IMCA 3922 - Original Message - From: JoshuaTreeMuseum joshuatreemus...@embarqmail.com To: meteorite-list@meteoritecentral.com Sent: Wednesday, November 24, 2010 10:40 AM Subject: [meteorite-list] sulphurous smell of meteorites (was Temperature ofmeteorites) Marco: Ditto that! Last summer I was photographing some crusted Zag in the full sun when it was 95 degrees out. I was distracted for four or five minutes, when I came back the meteorites were so hot you could barely hold them in your hand! Phil Whitmer Piper et al., Without implying that ALL reports of sulphurous smells are necessarily unreliable, I do urge caution. Over my career of checking alleged Dutch new meteorite falls (all meteorwrongs!) there have been a number of cases where people reported to me sulphurous smells when encountering the stone. Mind you: all of these were *not* meteorites, but things ranging from flint to brick to slag. Like red glowing, the sulphorous smells are something that people apparently expect with true meteorites. So they tend to observe it, even if the object later turns out to be not a meteorite but an earthly object! Never underestimate the power of suggestion. The same goes for reports of very hot meteorites. Concerning the latter: when a fall takes place in bright sunlight, be aware that after the fall the stone will quickly get hot simply because the black fusion crust absorbs warmth from sunlight, in the same way that tarmac or a dark painted garden bench do. I 'discovered' this several years ago when placing a few fragments of Mbale in sunlight for a few minutes for a photograph. When I picked them up I almost dropped them again because of a sensation of them being hot (on second inspection, they weren't actually that hot, but they did clearly warm up in the sunlight enough for this initial sensation to occur). In more speculative moments, I have pondered a few times whether the decay of very shortlived radioisotopes in meteorites could play a role in reports of glowing and hot fresh-fallen meteorites as well. That is pure speculation that will probably not hold on closer scrutiny, however. - Marco - Dr Marco (asteroid 183294) Langbroek Dutch Meteor Society (DMS) __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Rocks from Space Picture of Day - October 28, 2010
Hey Greg/Adam, I'm sure this guy was a real jerk and you deserved to give him the 'boot' out... But, don't give up on all of us newbies We got 'hooked' a few years back... If it weren't for Keith and Dana Jenkersen taking time with us (((we should add Jeff Nodkin as well, and also a lot of great hunters around a campfire in Franconia))) we might not be where we are now. Still learning, (and still buying the occasional meteor-wrongs), but a whole lot more educated and understanding of the need/value that we hunters bring to the research and preservation of such a very rare commodity. I am sure the afore mentioned hunters might have thought they were 'wasting' their valuable time teaching us 'the ropes', but had they not been so gracious, we would never be where we are now. We love to hunt, and we love to BUY, to increase our modest collection, to preserve, and to continue our learning. In fact, you might check your EBay Paypal account We undoughtedly have bought specimens from YOU You just never know, but you might be inspiring new hunters/collectors/researchers. For example, the day-by-day account of your latest meteorite 'run' sounded awesome. This is what its all about... Conservation, research, education, and along the way, good times and good friends. By the way, Keith Dana have since become good friends of ours. So, don't give up on all of us JERKS who show up on your door step. Some if us got real potential.. Jon Joyce Dongell IMCA 3922 -- -- - Original Message - From: Adam Hupe raremeteori...@yahoo.com To: Adam meteorite-list@meteoritecentral.com Sent: Saturday, October 30, 2010 10:51 AM Subject: Re: [meteorite-list] anyone know Steven Curry? LUNAR METEORITE STORY These people are really scary. I was hooking up a trickle charger to my four-wheeler meteorite chaser yesterday when a complete stranger startled me by walking into my open garage. It surprised me so much that I failed to get his name. He was able to look me up on-line and decided to pay a visit unannounced. I live in a gated community with video surveillance and this guy some how was able to get in. He was from out of town vacationing here in Laughlin and decided to spend some of his time looking for meteorites. Apparently, he was not winning at the Casinos so decided to make a sizable fortune by plucking meteorites that according to him were lying around everywhere. I told him that not a single comfirmed meteorite has ever been found in Laughlin but he insisted his looked just like every other one he had seen on-line and on TV. He showed me his suspected finds and I told him to take them to a university since I no longer comment on finds and I am not qualified to classify them. I was trying to be polite but my other half, Zann got really angry about the situation and told him to leave. With over 6 million visitors to Laughlin every year, this is bound to happen again. When people have dollar signs in their eyes, they are willing to go to any length. This is the first and hopefully the last time one of these crazies comes to my home. Best Regards, Adam - Original Message - From: Greg Hupe gmh...@htn.net To: meteorite-list@meteoritecentral.com Sent: Friday, October 29, 2010 5:22 PM Subject: Re: [meteorite-list] Rocks from Space Picture of Day - October 28,2010 Hello Everyone! Thank You to everyone on List and off who sent me the very nice congrats for my little Nevada finds! I thoroughly enjoy hunting for meteorites whether they are a fresh fall or a find from miles of hiking around different terrain. It doesn't matter if I find anything as hunting with family and friends is reward enough... but finding one every once in a while sure takes the pain away from all the walking!! I hope everyone has a great weekend, mine will be spent getting things taken care of on the home front after having been gone for a month. Good Luck to all who are out there hunting or plan any future searches! Best regards, Greg Greg Hupe The Hupe Collection NaturesVault (eBay) gmh...@htn.net www.LunarRock.com IMCA 3163 Click here for my current eBay auctions: http://search.ebay.com/_W0QQsassZnaturesvault - Original Message - From: Michael Johnson mich...@rocksfromspace.org To: meteorite-list@meteoritecentral.com Sent: Wednesday, October 27, 2010 10:10 PM Subject: [meteorite-list] Rocks from Space Picture of Day - October 28, 2010 http://www.rocksfromspace.org/October_28_2010.html __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Don't give up on the new guys
Greg, An innocent mistake. Was replying to Adam's string... And about to press 'Send', when I noticed there was only an Adam in the 'Cc' box. So, went to another string (must have been yours), which had meteorite-list in the Cc box, and copied my reply, plus Adam's original posting, to it. My bad Wow, I am getting a headache.. How about we change this string name, and call it. Don't give up on the new guys. Greg... Our reply was not meant as a jab at you In fact, I don't believe we have ever met Relax, enjoy your weekend, and don't give up on us new guys... P.S. we have enjoyed our purchases from you. Jon Joyce Dongell IMCA 3922 - Original Message - From: Greg Hupe gmh...@htn.net To: Jonathan E. Dongell jdong...@cox.net Cc: meteorite-list@meteoritecentral.com Sent: Saturday, October 30, 2010 12:03 PM Subject: Re: [meteorite-list] Rocks from Space Picture of Day - October 28,2010 Hi Jon, Greg Hupe here, I live in Florida and was just out west hunting, and luckily finding, meteorites. I was not at Adam's house in Laughlin, NV when this person showed up on his doorstep so I have no part in the interaction or thoughts regarding the unexpected visitor or newbies (I never liked that term since we all started out somewhere!). I still consider myself a newbie in many aspects of meteorite collecting, hunting, science and so on. There are many great meteorite hunters out there that leave my efforts in the dust and many scientists I learn from every day. I love the hunt, the science behind it and interacting with anyone who is a true person to meteoritics. I wish you great success out there hunting! Never know, maybe one day we will be out there hunting (and finding) together! Just curious, why did you combine two totally separate List email threads in your reply to Adam's post, but using my email address and Name to the List along with the Rocks From Space Picture... subject line? This does not seem like a very good way to 'reply', but almost a jab at me for whatever reason. I am all ears if you have something to say to me (Greg Hupe). Best regards, Greg Greg Hupe The Hupe Collection NaturesVault (eBay) gmh...@htn.net www.LunarRock.com IMCA 3163 Click here for my current eBay auctions: http://search.ebay.com/_W0QQsassZnaturesvault - Original Message - From: Jonathan E. Dongell jdong...@cox.net To: Greg Hupe gmh...@htn.net; meteorite-list@meteoritecentral.com Sent: Saturday, October 30, 2010 2:36 PM Subject: Re: [meteorite-list] Rocks from Space Picture of Day - October 28,2010 Hey Greg/Adam, I'm sure this guy was a real jerk and you deserved to give him the 'boot' out... But, don't give up on all of us newbies We got 'hooked' a few years back... If it weren't for Keith and Dana Jenkersen taking time with us (((we should add Jeff Nodkin as well, and also a lot of great hunters around a campfire in Franconia))) we might not be where we are now. Still learning, (and still buying the occasional meteor-wrongs), but a whole lot more educated and understanding of the need/value that we hunters bring to the research and preservation of such a very rare commodity. I am sure the afore mentioned hunters might have thought they were 'wasting' their valuable time teaching us 'the ropes', but had they not been so gracious, we would never be where we are now. We love to hunt, and we love to BUY, to increase our modest collection, to preserve, and to continue our learning. In fact, you might check your EBay Paypal account We undoughtedly have bought specimens from YOU You just never know, but you might be inspiring new hunters/collectors/researchers. For example, the day-by-day account of your latest meteorite 'run' sounded awesome. This is what its all about... Conservation, research, education, and along the way, good times and good friends. By the way, Keith Dana have since become good friends of ours. So, don't give up on all of us JERKS who show up on your door step. Some if us got real potential.. Jon Joyce Dongell IMCA 3922 -- -- - Original Message - From: Adam Hupe raremeteori...@yahoo.com To: Adam meteorite-list@meteoritecentral.com Sent: Saturday, October 30, 2010 10:51 AM Subject: Re: [meteorite-list] anyone know Steven Curry? LUNAR METEORITE STORY These people are really scary. I was hooking up a trickle charger to my four-wheeler meteorite chaser yesterday when a complete stranger startled me by walking into my open garage. It surprised me so much that I failed to get his name. He was able to look me up on-line and decided to pay a visit unannounced. I live in a gated community with video surveillance and this guy some how was able to get in. He was from out of town vacationing here
[meteorite-list] Don't give up on the new guys
Adam, Sounds like you and Zann are a very conscientious people. Wasn't trying to say otherwise. I am sure this guy was a real jerk. Although, I think I lost a lot of money in Laughlin once too : - ) So, let me put it another way... Even though people, like that jerk, sometimes show up at your door, don't give up on the rest of us. Look forward to meeting you both on a hunt some time. Jon Joyce Dongell IMCA 3922 - Original Message - From: Adam Hupe raremeteori...@yahoo.com To: Adam meteorite-list@meteoritecentral.com Sent: Saturday, October 30, 2010 12:18 PM Subject: Re: [meteorite-list] Rocks from Space Picture of Day - October 28,2010 Hi Jonathon, I encourage new hunters and enjoy being in the field with them. My brother-in-law and sister are both new to the hunt. Nothing will replace the smile on my brother-in-laws face when he found his first meteorite last Spring. When Count Guido showed up announced with his first find, I could not help but share in his enthusiasm for such a fantastic new meteorite. I have made many friends due to the meteorite hunts. Like treasure hunting, I think it is important that due care and proper ethics are instilled in those new to the hobby. It is important that a strict Code Of Ethics be followed by all of us or this hobby will go the same way as treasure hunting with most land off limits. People, like the crazy that showed up unannounced yesterday seem to be only interested in the monetary value and little else. They will not listen to a thing I have to say if it is not what they want to hear. This is what angered Zann into telling him to leave. I enjoy hunting with the largest manageable groups possible. More often then not, it is the rookies that seem to come up with great finds and there is no substitute for their enthusiasm they share willingly. I remember how excited I was about my first hunts. I still get the same excitement when somebody who has never hunted before joins in. It is that I dislike the crazies approaching me out of the blue. There is a difference between somebody new to the hobby and a money-crazed, eyes glossed over freak showing up at your doorstep unannounced who doesn't believe a thing you tell him because he is an expert from watching too much TV. Best Regards, Adam __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] The (Long) Weekend Warrior: Nine Moons, 62 Hours (Cassini)
Ron, I can understand why more impacts could be an indication of an older satellite, but could you explain why 'larger' impacts is also an indication of older, as well. Thank you, in advance. Jonathan Dongell IMCA 3922 - Original Message - From: Ron Baalke baa...@zagami.jpl.nasa.gov To: Meteorite Mailing List meteorite-list@meteoritecentral.com Sent: Tuesday, October 19, 2010 3:23 PM Subject: [meteorite-list] The (Long) Weekend Warrior: Nine Moons,62 Hours (Cassini) http://www.jpl.nasa.gov/news/news.cfm?release=2010-341 The (Long) Weekend Warrior: Nine Moons, 62 Hours Jet Propulsion Laboratory October 19, 2010 Taking a long-weekend road trip, NASA's Cassini spacecraft successfully glided near nine Saturnian moons, sending back a stream of raw images as mementos of its adrenaline-fueled expedition. The spacecraft sent back particularly intriguing images of the moons Dione and Rhea. The Dione and Rhea pictures are the highest-resolution views yet of parts of their surfaces. The views of the southern part of Dione's leading hemisphere (the part of the moon that faces forward in its orbit around Saturn) and the equatorial region of Rhea's leading hemisphere are more detailed than the last time we saw these terrains with NASA's Voyager spacecraft in the early 1980s. Of the five big icy moons of Saturn, Dione and Rhea are often considered a pair because they orbit close to each other, are darker than the others, and exhibit similar patterns of light reflecting off them. These new images, however, highlight the differences between these sister moons. Both images show similar geographic regions on each satellite. However, scientists can identify differences in geological histories of the two bodies from differences in the numbers and sizes of visible craters on their surfaces. The numbers and size of craters on a body's surface help indicate the age of that surface - the more craters there are and the larger they are, the older the surface is. Rhea, for example, shows ancient, intense bombardments throughout this region. However, the same region of Dione is divided into distinct areas that exhibit variations in the number and size of preserved craters. In particular, while parts of Dione are heavily cratered like Rhea, there are other areas covered by relatively smooth plains. Those areas have many small craters, but few large impact scars, which indicates that they are geologically younger than the heavily cratered areas. The smooth plains must have been resurfaced at some point in Dione's past -- an event that seems to be missing from Rhea's geological history on this side of the moon. Images of the moon Mimas, captured just before it went into shadow behind Saturn, will be compared to thermal maps made earlier this year that showed an unexpected Pac-Man heat pattern. (See for more details. http://www.jpl.nasa.gov/news/news.cfm?release=2010-103) Cassini also caught a picture of the tiny, 4-kilometer-wide (3-mile-wide) moon Pallene, in front of the planet Saturn, which is more than 120,000 kilometers (75,000 miles) wide at its equator. Cassini's elliptical orbital pattern around Saturn means it can target moons for flybys about once or twice a month. The flybys on this particular Cassini road trip were non-targeted flybys, meaning navigators did not refine Cassini's path to fly over particular points on each moon. Cassini's long weekend started on Thursday, Oct. 14, at 5:07 p.m. UTC (9:07 a.m. PDT), when it passed by Saturn's largest moon Titan at an altitude of 172,368 kilometers (107,104 miles) above the surface. Then came a whirlwind 21 hours in which Cassini flew by Polydeuces at 116,526 kilometers (72,406 miles), Mimas at 69,950 kilometers (43,465 miles), Pallene at 36,118 kilometers (22,443 miles), Telesto at 48,455 kilometers (30,109 miles), Methone at 105,868 kilometers (65,783 miles), Aegaeon at 96,754 kilometers (60,120 miles) and Dione at 31,710 kilometers (19,704 miles). Cassini's last visit -- Rhea at 38,752 kilometers (24,079 miles) â? took place at 6:47 a.m. UTC on Oct. 17 (10:47 p.m. PDT on Oct. 16). Scientists decided in advance which observations they wanted to make while the spacecraft was cruising past all the moons. They chose to obtain images of Titan, Mimas, Pallene, Dione and Rhea. They also obtained thermal scans of Mimas, Dione and Rhea. For more raw images, visit: http://saturn.jpl.nasa.gov/photos/raw/ . The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory manages the project for NASA's Science Mission Directorate in Washington. The Cassini orbiter was designed, developed and assembled at JPL. The imaging operations center is based at the Space Science Institute in Boulder, Colo. More Cassini information is available, at t http://www.nasa.gov/cassini http://www.nasa.gov/cassiniand http://saturn.jpl.nasa.gov. Jia-Rui C. Cook 818-354-0850 Jet Propulsion
Re: [meteorite-list] The (Long) Weekend Warrior: ... Crater Size and Age
Got it. Thanks Elton. - Original Message - From: MEM mstrema...@yahoo.com To: Jonathan E. Dongell jdong...@cox.net; Meteorite Mailing List meteorite-list@meteoritecentral.com Sent: Tuesday, October 19, 2010 10:08 PM Subject: Re: [meteorite-list] The (Long) Weekend Warrior: ... Crater Size and Age With regard to the range of asteroid sized bodies, average body size is trending smaller owing to collisions. The solar system has been greatly depleted of larger bodies as compared to the original populations of planetary/asteroidal bodies. Collisions, by-in-large, produce multiple smaller objects which, over time, produce even smaller objects and so on. So large impacts statistically point back to a very early solar system with a greater proportion of larger objects. The impact itself is evidence of depletion. In general, the more impacts visible on the surface, the relatively longer exposure that surface has had to impacts. An older surface that hasn't been renewed by tectonic/volcanic recycling will have more craters and a higher proportion of larger astroblemes. We date planetary surface geological activity/age using crater count and overlap statistics with crater sizes factored in.. Elton - Original Message From: Jonathan E. Dongell jdong...@cox.net To: Ron Baalke baa...@zagami.jpl.nasa.gov; Meteorite Mailing List meteorite-list@meteoritecentral.com Sent: Tue, October 19, 2010 9:41:26 PM Subject: Re: [meteorite-list] The (Long) Weekend Warrior: Nine Moons, 62 Hours (Cassini) Ron, I can understand why more impacts could be an indication of an older satellite, but could you explain why 'larger' impacts is also an indication of older, as well. Thank you, in advance. Jonathan Dongell IMCA 3922 __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
