Re: [meteorite-list] Meteoright? -photos
Doug, The metal specks in the ground surface sure look right! The strong rusting of the exterior makes the chances of fusion crust preservation pretty remote. Even with one of the bloody little devils in our hands, it takes a lot of soul searching to feel "sure", but based on a fuzzy photo, I'd bet you have a winner. In the natural mineral kingdom, the only likely candidates for the speaker magnet test are magnetite, maghemite, and pyrrhotite. The first two are already oxides, and don't rust as in your pics. Pyrrhotite will rust, but on a polished surface is brassy to bronzy, not gray. Man-made stuff is another ball of worms, but your textures don't look synthetic. Be sure and post the final "vote" tally! Cheers, Norm (http://tektitesource.com) - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Tuesday, December 23, 2003 9:31 PM Subject: [meteorite-list] Meteoright? -photos http://community.webshots.com/album/106219825vellHyresend with new link above (Thanks Mark, A, L, and others who wrote me asking for the image)OK, I have yet another try of posting photos, so this should finally work. The following stone, basically teardrop shaped, 1 cm X 1 cm X 0.6 cm, or 1 cm X 0.6 cm X 0.6 cm depending how you measure, weighing in the neighborhood of 1 g was found by me in a very desertic area, in a water runoff that probably gets rained on once a year. It sticks to my OEM poor quality speaker magnet, and jumps up to a stronger magnet with a click. The surface has a distinctly rusty coating, though it appears that a blackened layer may be under. It initially leaves a light rust colored streak on the back of a ceramic tile but that seems to stop completely as the outer oxidation is removed. I took it to the side of the cutting surface of a home ceramic tile cutting wheel to make a window, which was crude, so I smoothed with sandpaper. Neither before or after the sanding was I able to see any green crystalline evidence, but the sanding brought out shiny metal, intersperced in a gray matrix. Some rust remains on the window as I didn't want to shave the pebble away. Whether there are chondrules in the face I don't know, there appear darker spots, and I'd appreciate it if the list can tell me if they see fusion crust, which I think I see, but...I have no reference collectings and resident experts around. I am pretty convinced that this one (of my 17 candidates is a meteorite, but I could be biased. 15 of the other 16 are already eliminated. Please give me a hand on this one. All pictures are of the same stone, at the limit of my digital camera resolution. The true color is in between the bright and shadow shot in Met-1. Is it? Thanks!Doug
Re: [meteorite-list] Discovery of a Double Impact Crater in Libya
Charles, Exactly the right question! The source crater for LDG is still absolutely unknown. Whether these new features might be the source was my INSTANT question, and I was disappointed that the subject received no comment. I'm sure it will in due time, as this is still one of the big missing crater mysteries! The address of the new craters certainly sounds suspicious. Cheers, Norm (http://TektiteSource.com) - Original Message - From: Charles Viau [EMAIL PROTECTED] To: 'Meteorite Mailing List' [EMAIL PROTECTED] Sent: Friday, December 19, 2003 8:45 PM Subject: RE: [meteorite-list] Discovery of a Double Impact Crater in Libya Fantastic! The somewhat obvious question is that could these structures possibly be a source for Libyan Desert Glass, or is the source for that material already well known? CharlyV -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ron Baalke Sent: Thursday, December 18, 2003 11:52 AM To: Meteorite Mailing List Subject: [meteorite-list] Discovery of a Double Impact Crater in Libya Observatoire aquitain des sciences de l'Univers Floirac, France For further information, please contact: Philippe Paillou UMR 5804, OASU (Observatoire aquitain des sciences de l'Univers) [EMAIL PROTECTED] (33) (0)557 776 126 16 December 2003 Discovery of a double impact crater in Libya Impact cratering is now recognized as a major geological process on Earth. In particular, giant impacts had a fundamental influence on the geological and biological evolution of our planet with possible climatic effects. There are more than 160 confirmed impact craters on Earth, among which 17 are located in Africa, but it is estimated that only 10% of impact craters larger than 10km and younger than 100Ma are known. The Sahara is a particularly favorable region to host young impact craters, but according to cratering rate estimates, most of them still remain to be discovered, hidden under dry sandy sediments. Only four confirmed impact craters are currently known in eastern Sahara. Two are located in eastern Libya: B.P. (British Petroleum) structure and Oasis crater, and two are located in northern Chad: Aorounga and Gweni-Fada craters. While optical sensors can only image the desert's surface, it was shown twenty years ago that orbital Synthetic Aperture Radar (SAR) could retrieve subsurface information hidden under a few meters of dry sand. Within an international project -- dubbed SAHARASAR -- that aims at mapping the near subsurface of the Sahara and Arabian regions using satellite-borne radar, we realized a regional-scale radar mosaic at 100m resolution over the eastern Sahara from existing JERS-1 archives (a Japaneese satellite operated from 1990 to 1998). This unique data set allowed us to discover a double circular structure in the southeastern part of the Libyan desert. Fieldwork confirmed that this formation is an unknown double impact crater with a diameter around 10 km. The newly discovered structures are located 110km west of Djebel Arkenu and 250km south of Kufra oasis in Libya, at coordinates N22 deg 04', E23 deg 45'. It is a flat and hyperarid area, presenting a Cretaceous sandstone formation covered by active aeolian deposits and Quaternary soils, located tens of kilometers away from any track, in a hazardous zone due to the proximity of Second World War minefields. The optical Landsat-7 image shows a sandy region with large sand dunes trending SW-NE, while the corresponding L-band radar image extracted from the JERS-1 radar mosaic reveals two circular structures partially hidden by Quaternary deposits. The radar scene then clearly reveals a double circular structure composed of a southwestern crater 10.3km in diameter and a northeastern crater of diameter 6.8km. The NE crater is composed of concentric inner and outer rings separated by a depression filled with sediments, also observed in the optical scene. Its morphology is very similar to the Aorounga crater in Chad, corresponding to a typical complex crater. The SW crater also presents a circular shape with possibly three concentric annular ridges. The host rock of the double circular structure is a cross-bedded coarse-grained to conglomeratic sandstone of Lower Cretaceous age containing plant fossils and thin shale interbeds, leading to an estimated impact age of less than 140Ma. A field survey was carried out during April 2003 in order to obtain definitive proof of the impact origin of the observed structures (i.e. shatter cones, high shock pressure metamorphism, planar microstructures in quartz grains, high pressure polymorphs such as coesite and stishovite, Iridium enrichment). We observed quantities of shatter cone structures on the site, all located close to the inner ridge of the NE crater. Large outcrops of allochthonous impact breccia could also be observed in both craters. We could find several quartz grains presenting planar fractures (PFs) in these breccia. Such planar
Re: [meteorite-list] ebay ads
John List, MY vote: Well said John. Concise and to the point! The adds, eBay and otherwise,DO relate to our subject. But there's a miserable bunch of spam that doesn't, and I hate to admit that this email from me is closer to the latter than to the former. Sorry. The problem with the separate Yahoo eBay list is that most of us have inboxes overflowing with garbage (and the meteorite list, junk and all, is some of theGOOD stuff). But I'm not shopping for another site to visit to get the rest of the story; instead, I need a way to simplify the inbox. As for eBay, I go straight to eBay and look at the "closing today" category. (As a result, I miss some "Buy Now" opportunities. I only hear about them on the list). Further, some of us old dogs aren't even looking for new tricks. We feel pretty proud just doing the things we know. I've learned my way around this list, website management, eBay, and even feel like I know some of you that I've neveryet met! I've got no problem with the concept of the eBay list, but I haven't even seriously considered going there. If I represent any significant sector of this readership, THAT may be a problem. Here's my idea: Let's keep the eBay METEORITE announcements here, and all the METEORITE adds, and send the female dog, whine, and personal attack sessions that have no METEORITE info, availability, questions, stories, cautions, etc., to some other location ( I wouldn't even need to know the location--).THAT would simplify my inbox! This list is part of my life. I'm not whiningjust voting. Merry Winter Solstice and a Happy New Orbit to All! Norm (http://TektiteSource.com) - Original Message - From: mary kashuba To: Comcast Mail ; Meteorite list Sent: Sunday, December 14, 2003 5:27 PM Subject: Re: [meteorite-list] ebay ads Bob and List, Thank you for asking. I like the sales ads. I like the ebay ads. I like crooks being outed. I like hearing from hunters, snarly or not. I like the science discussions. I like Proud Tom. John Kashuba Ontario, California - Original Message - From: Comcast Mail To: Meteorite list Sent: Sunday, December 14, 2003 11:00 AM Subject: [meteorite-list] ebay ads Does anyone else think that the debate over technicalities are more annoying than the actual ebay ad posts themselves? Just curious Or lets take a vote How many appreciate the sales ads? How many are against it? Anyone with time to waste please keep track of tallying the votes, and let majority rule.
Re: [meteorite-list] Unwanted posts on the list
Jeeez Big Mike! You must've gotten a post from John that I missed. No bitching. No whining, in fact, a breath of fresh air. Did I miss something? Seriously. It happens. There are a bunch of other posts that your response fits, but not John's! (At least the post I have seen that is attached) Norm (Sucked into a dumb exchange not involving Meteorites. So sorry. P.S., show me any computer on earth with a delet (sic) button, kinky or otherwise! ) - Original Message - From: Michael L Blood [EMAIL PROTECTED] To: mary kashuba [EMAIL PROTECTED]; Comcast Mail [EMAIL PROTECTED]; Meteorite list [EMAIL PROTECTED] Sent: Sunday, December 14, 2003 7:48 PM Subject: [meteorite-list] Unwanted posts on the list Hi John all, I am CONTINUALLY amazed! Just flabbergasted that otherwise intelligent people INSIST on reading postings on threads they dislike! THEN THEY COMPLAIN ABOUT THEM! I mean REALLY! How kinky can you get? There IS a delet button on every computer I ever saw AND you can just not open the damned things! Did this ever occur to the seeming throngs of discontented list members I don't like LOTS of the stuff on this list. but I just don't read it! OR, I read it to enjoy not liking it! See, there are these little Subject lines that tell you what the post is about. That is how it works. YOU get to decide You don't like ads? DON'T OPEN THEM. You don't like Proud Tom - or don't like what everyone else has to say about Proud Tom - DON'T READ ABOUT HIM. JEEZ! Folks, figure it out, already! Just a friendly reminder from Michael on 12/14/03 5:27 PM, mary kashuba at [EMAIL PROTECTED] wrote: Bob and List, Thank you for asking. I like the sales ads. I like the ebay ads. I like crooks being outed. I like hearing from hunters, snarly or not. I like the science discussions. I like Proud Tom. John Kashuba Ontario, California - Original Message - From: Comcast Mail To: Meteorite list Sent: Sunday, December 14, 2003 11:00 AM Subject: [meteorite-list] ebay ads Does anyone else think that the debate over technicalities are more annoying than the actual ebay ad posts themselves? Just curious Or lets take a vote How many appreciate the sales ads? How many are against it? Anyone with time to waste please keep track of tallying the votes, and let majority rule. Better to write for yourself and have no public, than to write for the public and have no self. Cyril Connolly -- Hubble space telescope - AMAZING photos!: http://wires.news.com.au/special/mm/030811-hubble.htm -- http://www.costofwar.com/ -- SUPPORT OUR TROUPS: http://www.takebackthemedia.com/onearmy.html -- Worth Seeing: - Earth at night from satellite: http://antwrp.gsfc.nasa.gov/apod/image/0011/earthlights_dmsp_big.jpg - Interactive Lady Liberty: http://doody36.home.attbi.com/liberty.htm - Earth - variety of choices: http://www.fourmilab.ch/earthview/vplanet.html -- Panoramic view of Meteor Crater: http://www.virtualguidebooks.com/Arizona/GrandCanyonRoute66/MeteorCrater/Met eorCraterRimL.html -- Cool Calendar Clock: http://www.yugop.com/ver3/stuff/03/fla.html -- Michael Blood Meteorites Didgeridoos for sale at: http://www.michaelbloodmeteorites.com/ __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Aswan Rock - Opinions?
Jeff list, I've spent my career with rocks like that! It is a hydrothermal breccia from a low-sulfidation epithermal vein system. You'll notice that some of the clasts have quartz/chalcedony hairlines healing jigsaw-puzzle breccias (pieces would still fit neatly back together, not jumbled or significantly displaced). This is hydraulic fracturing that forms as fluid pressures exceed lithostatic pressures, just before a hydrothermal explosion. Once the system cracks and explodes, fluid streaming does jumble and rotate most of the clasts. Your rock likely contains anomalous amounts of As, Hg, Sb, and quite possibly, Au and Ag.The rounded exterior is simply from erosion and water transport. From the photos I can't tell for sure what the clasts are, but I would guess they are rhyolite (a common associate of this style of mineralization). Merry Winter Solstice and a Happy New Orbit to All, Norm Lehrman (http://TektiteSource.com) - Original Message - From: Jeff Kuyken To: Meteorite List Sent: Friday, December 12, 2003 2:38 AM Subject: [meteorite-list] Aswan Rock - Opinions? Hey all, When I was in Egypt in October, I jumped onto a young half-trained CCRRAAZZYY camel and headed out into the desert. Among a few rocks (mostly fossils) I found an interesting stone which was nothing like the others in the area. I don't think it is a meteorite but it does look like some kind of breccia. It is a broken quarter sphere in shape and the photos are ofthe two broken surfaces. I'd appreciate any opinions on this one. Thelinks are: http://www.meteoritesaustralia.com/images/Aswan 1.jpg http://www.meteoritesaustralia.com/images/Aswan 2.jpg Cheers, Jeff KuykenI.M.C.A. #3085www.meteorites.com.au
Re: [meteorite-list] LOOK OUT FOR THE ARRIVAL OF THE GALAXY METEORITE INVASION
Steve and List, Surely it has not escaped the list's notice that GOLFYX is an acronym that translates loosely as Gelatinous Ooze Liquidating Fake Xenocrystic Ytterbium. You did all guess that, right??? I'm really starting to dislike rip-off artists. These criminals aren't funny. Norm (TektiteSoucecom) - Original Message - From: Steve Arnold, Chicago!!! [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Saturday, December 06, 2003 4:08 PM Subject: [meteorite-list] LOOK OUT FOR THE ARRIVAL OF THE GALAXY METEORITE INVASION Hey list members.Beware of the GALEXY METEORITE INVASION on ebay.It looks like the alien invader GOLFYX,has unleashed a burarge of the evil GALEXY METEORITES upon an unsuspecting world.BEWARE STEVE ARNOLD, CHICAGO = Steve R.Arnold, Chicago, IL, 60120 I. M. C. A. MEMBER #6728 Illinois Meteorites website url http://stormbringer60120.tripod.com http://members.ebay.com/aboutme/illinoismeteorites/ __ Do you Yahoo!? New Yahoo! Photos - easier uploading and sharing. http://photos.yahoo.com/ __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Bad Buyer Alert
List, I've been contacted by another dealer off-list who was also ripped off by the same guy. Same approach. He will do it again, so heads up!!! Norm IMCA #4946 - Original Message - From: N Lehrman To: [EMAIL PROTECTED] Sent: Saturday, November 15, 2003 6:55 PM Subject: [meteorite-list] Bad Buyer Alert List, Here's a guy so dishonest (in my opinion) that I'm worried about posting this. He's a relativelywealthy snake-oil salesman (in my opinion)/alternative medicine practitioner with a radio talk show in New York that has taken an interest in Tektites and Meteorites. His modus operandi is to gain your trust with smooth thousand dollar-plus transactions, then call you asking for a top-shelf item to be sent by next-day delivery. He will promise to send you payment on the same schedule. When you call asking where the money is, he will blame his staff and promise to take care of it. He will stop answering any attempts to communicate, even from your lawyer. He will not return the subject specimen. He nailed me for $8000. Be warned. I can't tell you his name because of continuing litigation. However, if (in my opinion) his name resembles Dr. David Wheeler, and if his address resembles Lake Oswego, Oregon, and if he has a radio show in New York, (in my opinion) you would be wise to avoid business (?) transactions with him. Bear in mind that any resemblance to any real Dr. David Wheeler of Lake Oswego havinga talk show in NY is pure coincidence (in my opinion). I'm sure Dr. David Wheeler of Lake Oswego, Oregon, USA (if such a person exists in reality) is a fine upstanding citizen. The evil (in my opinion) guy that might seem to match his description, name, and addressis a crook and common thief (in my opinion). I hate being ripped off and would hope to help avoid this for any of you on the list. Cheers, Norm
[meteorite-list] Bad Buyer Alert
List, Here's a guy so dishonest (in my opinion) that I'm worried about posting this. He's a relativelywealthy snake-oil salesman (in my opinion)/alternative medicine practitioner with a radio talk show in New York that has taken an interest in Tektites and Meteorites. His modus operandi is to gain your trust with smooth thousand dollar-plus transactions, then call you asking for a top-shelf item to be sent by next-day delivery. He will promise to send you payment on the same schedule. When you call asking where the money is, he will blame his staff and promise to take care of it. He will stop answering any attempts to communicate, even from your lawyer. He will not return the subject specimen. He nailed me for $8000. Be warned. I can't tell you his name because of continuing litigation. However, if (in my opinion) his name resembles Dr. David Wheeler, and if his address resembles Lake Oswego, Oregon, and if he has a radio show in New York, (in my opinion) you would be wise to avoid business (?) transactions with him. Bear in mind that any resemblance to any real Dr. David Wheeler of Lake Oswego havinga talk show in NY is pure coincidence (in my opinion). I'm sure Dr. David Wheeler of Lake Oswego, Oregon, USA (if such a person exists in reality) is a fine upstanding citizen. The evil (in my opinion) guy that might seem to match his description, name, and addressis a crook and common thief (in my opinion). I hate being ripped off and would hope to help avoid this for any of you on the list. Cheers, Norm
Re: [meteorite-list] Question about tektites
Bernhard list, I'm not sure which eBay offering you were looking at, but here's my best shot: I don't like the term "regmaglypt" for any form of tektite ornamentation, nor will you find it used in that context in the literature. In meteorites, the term is typically used to describe pitting attributed to differential ablation of different mineralogical or compositional patches. If one accepts this sort of genetic implication in the term, it clearly is inappropriate for tektites which are a marvel of homogenous purity. By the way, for any who peruse tektites on eBay, be advised that the "Tanzanian tektites" are not tektites. I've written to the sellers suggesting that they at least include admission of uncertain origin, but they are more interested in perpetuating the scam than in honesty. I'm pretty sure the material isgold assay slag, which is why they are always offered in faceted form. If you saw the raw material, I'm willing to bet you would not see any characteristic tektite morphology. The only known African tektites are those from the Ivory Coast. Norm Lehrman, cum grano salis (http://tektitesource.com) - Original Message - From: Bernhard "Rendelius" Rems To: [EMAIL PROTECTED] Sent: Monday, November 10, 2003 4:36 AM Subject: [meteorite-list] Question about tektites Greetings, I have seen a lot of SE Asian tektites offered on eBay and at dealers. As far as I can remember, I havent seen one with remaglyptes until today. Now: is this common or rare? I am not talking about the usual bubbles I know the difference J Best regards, Bernhard Rendelius Rems CEO RPGDot Network This outgoing mail has been virus-checked. image001.jpg
[meteorite-list] Story of a cold search Find!
List, Please forgive if this is a duplicate. I tried sending it out yesterday, but I don't think it worked. Second try. I finally found my first meteorite! It only took 35 years You'll findthe story and photos at the following link:http://tektitesource.com/First%20Meteorite.htmlWhat a thrill!!!Check out my description and the initial photos. Any comments regardingpossible classification will be appreciated!Norm Lehrmanhttp://tektitesource.com
Re: [meteorite-list] Story of a cold search Find!
List, I wish I could thank everyone individually that has taken the time to send reactions to my post. In this troubledtime there is something very reassuring in finding others all over the world who can appreciate the simple wonderment in this little story. I'm not sure how many of the responses were posted to all on the list, but the reaction has been overwhelming. Lots of people have been able to enter in to the thrill of this milestone in my experience. Thanks! Some things just have to be shared, and this was such an event for me. Perhaps no big deal to most, but I sure appreciate those who do understand May you all have such an experience! Thanks again, Norm - Original Message - From: N Lehrman To: [EMAIL PROTECTED] Sent: Wednesday, November 05, 2003 7:06 AM Subject: [meteorite-list] Story of a cold search Find! List, Please forgive if this is a duplicate. I tried sending it out yesterday, but I don't think it worked. Second try. I finally found my first meteorite! It only took 35 years You'll findthe story and photos at the following link:http://tektitesource.com/First%20Meteorite.htmlWhat a thrill!!!Check out my description and the initial photos. Any comments regardingpossible classification will be appreciated!Norm Lehrmanhttp://tektitesource.com
Re: [meteorite-list] Now: Is this really a fulgurite (Picture link)
Bernhard, Pretty doubtful. The key feature you will see on all fulgurites is a definite glass lining. The external surface is commonly variably fused sand. Your specimen looks like limonite/goethite (check the streak). If it's FeOx and lacks a glassy core, it's not a fulgurite. Norm Lehrman (TektiteSource.com) - Original Message - From: Bernhard "Rendelius" Rems To: [EMAIL PROTECTED] Sent: Wednesday, October 22, 2003 10:56 AM Subject: [meteorite-list] Now: Is this really a fulgurite (Picture link) Greetings, After having had mail contact with some list members on the question of the fulgurite (and having received some pictures), I am not so sure that what there is is really a flugurite. It looks so different. Please have a look at this picture: http://www.rendelius.com/fulgu.jpg and tell me what you think. What I can tell you to help you with your expertise: If you touch this object, it feels sandy for sure, and it leaves tiny grains of sand (very few) on your fingers. The color on the photo is very accurate. Again: size of the object is: 9cm in length, 2.5cm inner diameter. I am really curious about your opinions. Best regards, Bernhard Rems IMCA #2121
Re: [meteorite-list] NEW Eucrite, absolutely the strangest ever seen!
Mark others, This is totally absurd. Look up "gabbro" if you can spell it. Then write. Norm (an earth geologist that doesn't make up new definitions---) - Original Message - From: Mark Ferguson To: tett Cc: [EMAIL PROTECTED] Sent: Saturday, October 18, 2003 7:49 PM Subject: Re: [meteorite-list] NEW Eucrite, absolutely the strangest ever seen! Hi Tett and list A gabro is a collection of individual rocks (they don't have to be the same kind of rock either)welded or held together by some cemmenting substance. Here on earth, the cemment can be cristobalite, opal, limestone, stiltstone, and many other items. A cemment with rock in it is a manmade gabro. So, gabroic infers that it is like a gabro. Mark - Original Message - From: tett To: Michael Farmer ; [EMAIL PROTECTED] Sent: Saturday, October 18, 2003 4:14 PM Subject: Re: [meteorite-list] NEW Eucrite, absolutely the strangest ever seen! What the heck does Gabbroic mean? Took a look at the images on your web page. Sure is one cool looking meteorite Mike - Original Message - From: Michael Farmer To: [EMAIL PROTECTED] Sent: Saturday, October 18, 2003 6:49 PM Subject: [meteorite-list] NEW Eucrite, absolutely the strangest ever seen! I have finally got a classification that I have been waiting two years for. It is NWA 1925, a new Gabbroic Cumulate Eucrite. This sucker is the strangest meteorite I have seen, we did not know what to think when we cut it. Likewise the scientists have been having a fit with it. It is unlike any known eucrite, large crystals up to 8mm of Plagioclase and Pyroxenes. Read the data for yourselves. I have a little for sale, and that is it. Grab it now, Ted Bunch said that it is one of the most interesting meteorites that he has ever seen. It is listed on my website. I also hope to get the India webpage up later tonight. Mike Farmer www.meteoritehunter.com
Re: [meteorite-list] Cold hunting?
Tom list, I've always liked the sound of this quote (the original formulation was Nininger's---), but I think it may be subject to a couple of qualifiers relating to preservation and exposure. As an exploration geologist, I spend at least 15-20 long days every month wandering the alluvial fans and dry lakes of Nevada searching for mineralized float (and, unofficially, meteorites!). Some of the remote dry lakes are almost certainly unsearched, and can cover many square miles. Putting along on my ATV, I can give a reasonably large area a pretty decent search. After several years of this, still NO cold finds. I think the point may be that there's a pretty good chance that stones have at some point fallen on most any square mile of earth's surface. However, in most areas, survival times are short. In many areas, erosion has erased the record. In other areas, deposition has buried every trace. From the cosmic perspective, every square mile is created equal, but for us grunts on the ground, that's far from the case. Some square miles are just right. Most are not. These are the ruminations of a fevered brain stumbling across the burning alkali flats, so take it with a grain of salt. I'm very curious to hear what others (Robert V.?) have to say on this. Cheers Norm Lehrman ( http://TektiteSource.com ) - Original Message - From: Tom aka James Knudson [EMAIL PROTECTED] To: meteorite-list [EMAIL PROTECTED] Sent: Wednesday, September 10, 2003 8:46 AM Subject: [meteorite-list] Cold hunting? Hello List, Two years ago today, Bernd pauli posted [meteorite-list] Arizona Meteorite Hunters. It quoted Twink Monrad as saying; I firmly believe that if a person were to go over any square mile, time after time, anywhere in the world, they'd also eventually find meteorites, How many list members agree with this statement? From what I have read, I have always believed it. There is a one mile square field near my house that is pretty well left alone. I have hunted it many times, both with my hawk and metal detector. I have not found anything yet with the detector, but had plenty of success on rabbits with my hawk. If the above statement is true, I figure I will find something eventually, I hope. I have learned that hunting one square mile is not an easy task. Any suggestions on hunting a cold area this big? Should you use a detector? Thanks, Tom Peregrineflier The proudest member of the IMCA 6168 __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Tektites?
Tom all, Tektites are now almost universally viewed as far-traveled impactites, mainly terrestrial material splashed by meteorite impacts. Some meteoritic components may be incorporated into the glass. Mysteries remain as to why only a few impacts are known to have created tektites, and we're still missing the biggest source crater of all. There also remain important unanswered issues raised by the old guard Lunar eruption or Lunar impact folks (O'keefe, Futrell, and friends). While they used these issues to argue against terrestrial impact origin, the arguments can just as well be used to illustrate imperfections in our understanding of the conditions and processes involved in tektite-producing terrestrial impacts. The Lunar theories have been greatly damaged by hard evidence from the moon landings. Huge, convoluted subject, but that's the short answer--- Norm Lehrman (http://tektitesource.com) - Original Message - From: Tom aka James Knudson [EMAIL PROTECTED] To: meteorite-list [EMAIL PROTECTED] Sent: Thursday, July 17, 2003 6:15 PM Subject: [meteorite-list] Tektites? Hello Good List, What is the number one theory out right now of where Tektites came from? Thanks, Tom Peregrineflier The proudest member of the IMCA 6168 __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] New Libyan Desert Glass Inventory!
List, Despite the recent challenges posed by the Egyptian government, I found a supplier who made it in to the LDG area early this year. I cherry-picked the best and have more coming. If you don't have any yet (or want to improve on what you do have), this is very magic stuff! Give it a squeeze at http://tektitesource.com All the best, Norm Lehrman IMCA #4946
Re: [meteorite-list] Speaking of tektites...
Jeannie and list; It's a nice idea, but in cases like the australasian fall, we're talking thousands to millions of tonnes of tektites. This poses big enough questions about the (undiscovered)source impact site without speculating that the tektites represent ablated fractions of an incomprehensibly bigger bolide which we also haven't found! As for the new Dunham Street, Park Forest micro-Tektoids, I don't have a clue. Sorry. Norm Lehrman (http://tektitesource.com) - Original Message - From: TMS/TNS/HRC To: [EMAIL PROTECTED] Sent: Wednesday, April 02, 2003 8:29 PM Subject: [meteorite-list] Speaking of tektites... Has anyone ever speculated about the fate of silicate inclusions/graphite nodules/etc.near the surface of iron meteorites, and ablate as they enter the atmosphere? I seem to remember long ago hearing a theory that this was one explanation ofthe origin of tektites. Ring a bell with anyone? Thoughts? Regards, Jeannie Devon From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Wednesday, April 02, 2003 5:41 PM Subject: [meteorite-list] Tektites Adam, List,It would stand to reason that if these are in fact a part of the fall, they will be magnetic, is this the case? If so, I would propose that they are remnants of the formation of the crust, that were caught up in the stones fall, following it to its destination, perhaps in an 'eddy' area behind the stone.As far as the shingle thing goes, I have climbed upon the roof and examined the material, no tektites here! (but there is some cool stuff!) Of course that does not discount that theory completely.They do look like miniatures of my tektite collection. Discovery is not impossible!Always Optimistic;-)Larry
Re: [meteorite-list] Tektites Muong Nong
Marcin/list: you'll find lot's of Muong Nongs offered by the folks (us) at http://TektiteSource.com . We can also get monsters in the multi-kilo range on special order. Cheers, Norm Lehrman The only thing with an attention span shorter than a third-grader on the day before Christmas is one of our kind on the week before Tucson See ya all there! - Original Message - From: PolandMET.com [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Sunday, January 26, 2003 2:11 PM Subject: [meteorite-list] Tektites Muong Nong Hello Someone have for sale/exchange Muong Nong tektites ? --[ MARCIN CIMALA ]--[ IMCA#3667 ]-- http://www.meteoryt.net [EMAIL PROTECTED] http://www.polandmet.com [EMAIL PROTECTED] http://www.vistapro.prv.pl +GSM (607) 535 195 [ Member of: Polish Meteoritical Society ] __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Nevada Meteorites
List, As many of you know, I am mostly a tektite guy (tektitesource.com), but I support my bad habits as an exploration geologist, currently working mostly in Nevada and how could a tektite guy not get interested in meteorites? Without having done any real research, I've noted only two NV meteorites: Primm (currently offered on eBay) and Quinn Canyon. Are there others?? Is there a simple way to look this up? Thanks, Norm Lehrman
Re: [meteorite-list] Meteor-doubtful
Tom, When there's a reserve set, if your maximum bid amount is less than the secret reserve, your initial bid would be just the $10 starting amount. However if you indicate a maximum bid that meets or exceeds the reserve, your bid goes instantly to the reserve price. Cheers, Norm - Original Message - From: Tom aka james Knudson [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Wednesday, December 18, 2002 5:25 PM Subject: Re: [meteorite-list] Meteor-doubtful Hello List, Maybe one of you E-Bayers can tell me why the starting bid was $10.00 and after one bid it went strait to $100 Thanks, Tom The proudest member of the I.M.C.A. #6168 From: Matson, Robert [EMAIL PROTECTED] To: '[EMAIL PROTECTED]' [EMAIL PROTECTED] Subject: [meteorite-list] Meteor-doubtful Date: Wed, 18 Dec 2002 16:07:20 -0800 Hi All, http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=2900909851 The story says it all. And yet someone is willing to throw $100 at it... No exact mass, no mention of being attracted to a magnet, and only one low-resolution image. But $100 was enough to meet the reserve... --Rob __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list _ The new MSN 8: advanced junk mail protection and 2 months FREE* http://join.msn.com/?page=features/junkmail __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteor-doubtful
Hey guys, Don't be so astonished. We're all variously involved with a field of interest that breeds and thrives on wild goose chases and tall tales, albeit the meter or astiroid usually went down just behind the barn rather than in it. No matter how jaded or seasoned we are, all of us sit up and pay attention when some old timer starts to spin a yarn like this at the other end of the bar. We get to be cynics and skeptics, but the dream never dies. One of these tales will come good. Most of us are game to gamble some of our time checking these stories. A few, perhaps the naive greenhorns amongst us, still gamble some money, but either way we're buying entertainment and fanning our fantasies. I always figured a great tale followed by a wild goose chase was worth something! This is where grandpas and grandmas get stories to tell the grandkids. The first law of serendipity is that in order to find anything you have to be looking for something. May we all have a backlog of exploded barns, big holes, and hot rocks to pursue! Regards, Norm - Original Message - From: Tom aka james Knudson [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Wednesday, December 18, 2002 6:46 PM Subject: Re: [meteorite-list] Meteor-doubtful I bet this people, seller and bidders are in this together for some reason? Maybe to get others to bid onit or some kind of scam! Thanks, Tom The proudest member of the I.M.C.A. #6168 From: Michael Masse [EMAIL PROTECTED] To: Matson, Robert [EMAIL PROTECTED],[EMAIL PROTECTED] Subject: Re: [meteorite-list] Meteor-doubtful Date: Wed, 18 Dec 2002 18:35:33 -0800 Humorous ... the bid is now up to $247.50 ... The seller has newly changed ID; the seller and one of the bidders buy gun stuff. One bidder's feedback is both low and bad; the other bidder has no feedback at all. Michael M - Original Message - From: Matson, Robert [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Wednesday, December 18, 2002 4:07 PM Subject: [meteorite-list] Meteor-doubtful Hi All, http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=2900909851 The story says it all. And yet someone is willing to throw $100 at it... No exact mass, no mention of being attracted to a magnet, and only one low-resolution image. But $100 was enough to meet the reserve... --Rob __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list _ MSN 8 helps eliminate e-mail viruses. Get 2 months FREE*. http://join.msn.com/?page=features/virus __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Tektite identification criterion
Mark and list,
Properties like those you've listed do show helpful
variations, but the range between individual tektite types tends to overlap with
terrestrial materials to the point that none of this allows one to discriminate
between tektites and other materials.
Despite the thousands of papers debating the myriad mysteries
of tektite lore, I don't know of any that directly address the fundamental
question "how do you tell if something is or is not a tektite?". I'd love
to hear from any of you out there with ideas or suggested
references.
I'm going to pull a synthesis of this subject together with
time, and there is a reasonable stash of widely scattered data that bear on the
subject. The really big challenge though is coming up with criteria that
can be used outside of a major university laboratory setting. For example,
one of the hallmark characteristics of tektite glass is its exceedingly low
water content. However, you'd be hard pressed to find any commercial
laboratory that could provide an accurate determination of this property at the
levels of resolution we require. Ditto a good ion microprobe
analysis. This is all great stuff in the academic laboratory settings
where most technical publications originate, but what are we supposed to do out
here on the front lines?
Of course, there are great folks in academia who will
collaborate on worthy issues, but such matters cannot extend to passing judgment
on suspect materials that arrive in the mail every other week. You
meteorite freaks know the routine well---and have developed a pretty good bag of
tricks to screen the winners from the losers. With tektites, we've barely
emerged from debating the very definition of the word.
Cheers,
Norm
(TektiteSource.com)
- Original Message -
From:
[EMAIL PROTECTED]
To: N Lehrman
Cc: [EMAIL PROTECTED]
Sent: Wednesday, December 18, 2002 8:46
PM
Subject: Re: [meteorite-list] Tektite
identification criterion
Hi Norm and list
Norm, are there any other tests that may prove useful like
refractive indice, specific gravity or thermal conductivity? I mention
these because of tektites having mineral contents not normally associated with
terrestrial rock or glass, and I don't know if tachylytes would be of concern
or not.
Mark flexing new old knowledge without a lot of
experience
- Original Message -
From:
N Lehrman
To: [EMAIL PROTECTED]
Sent: Wednesday, December 18, 2002 8:46
PM
Subject: [meteorite-list] Tektite
identification criterion
List,
New subject! At the
TektiteSource.com, we've been bombarded with a stream of tektite wannabes
(Texas, Arizona, Tanzania). I've been strugglingto
finda reasonably simple tektite test that doesn't require an ion beam
microprobe, etc. to do. I've thought about the followingapproach
for a while, but just never got around to trying it till today. The
basic concept is that true tektites typically contain absolutely no primary
crystallites (except for Muong nongs which occasionally do have remnant
mineral grains from incompletely melted target material). Only
crystalline materials can assume magnetic properties, so without crystals,
no magnetic susceptibility. Further, tektite glass is highly reduced
(i.e., low volatile Oxygen), so even if it were to have microcrystals, they
would not be magnetite. The black or green color of tektite glass is
from elemental iron literally dissolved in the glass, in which form it has
no magnetic properties.On the other hand, nearly all volcanic
glasses contain crystallites or phenocrysts. Since iron is abundant in
the earth's crust and magnetite crystallizes at relatively high
temperatures, it is an early-forming mineral---that is, if there were any
crystals starting to form, magnetite would likely be
there.Magnetite is, in fact, common in obsidian, sometimes
causing the black coloration.
From this line of thought, a fairly simple
test is obvious: check for magnetic properties. To nailthis down
in morequantified terms, I used a digital magnetic susceptibility
meter available to me through work (mag susc. basically relates to the
volume content of magnetic minerals like magnetite, titanomagnetite,
ilmenite, pyrrhotite and native iron). In effect, the magnetic
properties of the specimen provide an indirect way of assessing the presence
of crystallites AND the redox state of the material, both of which are good
solid criteria for tektites vs. terrestrial volcanics.
I'll post details after they're a bit more
refined, but the basic pattern matches the theory: true tektites have
extremely low magnetic susceptibilities; obsidians, apache tears, and
amerikanites all yield values 2 to 10 times higher, wit
[meteorite-list] Join Expedition to Libyan Desert!
Adventurers! Last chance! For several months we at the Tektite Source (http://TektiteSource.com) have been working to get some adventurers together for a trip into the Libyan Desert glass strewn field in southeastern Egypt. We still need a few more folks to get the trip confirmed. The plan is tomake thetwo weektrip during late February-Early March, 2003 in order to catch the best weather window. The cost will be about $2500 per person, not including your arrangements to reach and depart Cairo. Logistics will be handled by http://www.fjexpeditions.com/. These folks have been leading expeditions into the region mostly to look at rock art, etc. This will be the first trip focused exclusively on Libyan Desert glass. Visit their site for details, and feel free to contact them directly with questions. The Tektite Source is not in this for profitwe just want to go and need at least six more team members if we are to arrange a trip that emphasizes collecting. Other expeditions offered by this organizer typically spend a half day or so looking for LDG if the area happens to fall on their route. This is a major adventure trip, involving about five days cross-country travel through sand seas with dunes up to 300m tall, ONE WAY. We'll spend about 4 days in the collecting area, then return if we have enough fuel and water to make it out We need to finalize the team (limited by logistics to 8 to 10 individuals only, first come, first served) within the next few weeks, so let us and fjexpeditions know if your are interested. Cheers, Norm Lehrman
