[meteorite-list] 3 reports re NW Venezuela Andes black mat at 12.9 Ka, WC Mahaney et al, 2009-2011, free full texts: CosmicTusk.com: Rich Murray 2011.04.29
3 reports re NW Venezuela Andes black mat at 12.9 Ka, WC Mahaney et al, 2009-2011, free full texts: CosmicTusk.com: Rich Murray 2011.04.29 http://rmforall.blogspot.com/2011_04_01_archive.htm Friday, April 29, 2011 [ at end of each long page, click on Older Posts ] http://groups.yahoo.com/group/astrodeep/message/84 [ you may have to Copy and Paste URLs into your browser ] ___ http://www.scribd.com/doc/54163707/Evidence-from-the-northwestern-Venezuelan-Andes-for-extraterrestrial-impact-The-black-mat-enigma Geomorphology 116 (2010) 48–57 Evidence from the northwestern Venezuelan Andes for extraterrestrial impact: The black mat enigma W.C. Mahaney a,⁎, V. Kalm b, D.H. Krinsley c, P. Tricart d, S. Schwartz d, J. Dohm e,f, K.J. Kim g, B. Kapran a, M.W. Milner a, R. Beukens h, S. Boccia i, R.G.V. Hancock j, K.M. Hart k, B. Kelleher k a Quaternary Surveys, 26 Thornhill Ave., Thornhill, Ontario, Canada L4J 1J4 b Institute of Ecology Earth Sciences, Tartu University, Tartu, EE51014, Estonia c Institute of Geological Sciences, University of Oregon, Eugene, Oregon, 97403-1272, USA d Laboratoire de Geodynamique des Chaînes Alpines, University of Grenoble, Observatoire des Sciences de l'Univers, 38041, Grenoble, France e Department of Hydrology and Water Resources, University of Arizona, Tucson, Az., 85721, USA f The Museum, The University of Tokyo, Tokyo, 113-0033, Japan g Geological Research Division (Prospective Geoscience Research Department), Korea Institute of Geoscience and Mineral Resources (KIGAM), 92 Gwahang-no, Yuseong-gu, Daejeon 305-350, Republic of Korea h IsoTrace Lab, Dept of Physics, University of Toronto, Toronto, Ontario, Canada M5S 1A7 i Department of Materials Science, University of Toronto, Toronto, Ontario, Canada M5S 3E4 j Department of Medical Physics and Applied Radiation Sciences and Department of Anthropology, McMaster University, Hamilton, Ontario, Canada L8S 4K1 k School of Chemical Sciences, Dublin City University, Ballymun Road, Glasnevin, Dublin 9, Ireland a r t i c l e i n f oa b s t r a c t Article history: Received 11 January 2009 Received in revised form 9 October 2009 Accepted 14 October 2009 Available online 24 October 2009 Keywords: Asteroid impact Black mat Younger Dryas Paleoclimate A carbon-rich black layer encrusted on a sandy pebbly bed of outwash in the northern Venezuelan Andes, previously considered the result of an alpine grass fire, is now recognized as a ‘black mat’ candidate correlative with ClovisAge sites inNorth America, falling within the range of ‘blackmat’ dated sites (~12.9 ka cal BP). As such, the bed at site MUM7B, which dates to 11.8 ka 14C years BP (raw dates) and appears to be contemporaneous with the Younger Dryas (YD) cooling event, marks a possibly much more extensive occurrence than previously identified. No fossils (megafauna) or tool assemblages were observed at this newly identified candidate site (3800 a.m.s.l.), as in the case of the North American sites. Here, evidence is presented for an extraterrestrial impact event at ~12.9 ka. The impact-related Andean bed, located ~20 cmabove 13.7-13.3 ka cal BP alluvial and glaciolacustrine deposits, falls within the sediment characteristics and age range of ‘black mat’ dated sites (~12.9 ka cal BP) in North America. Site sediment characteristics include: carbon, glassy spherules, magnetic microspherules, carbon mat ‘welded’ onto coarse granular material, occasional presence of platinum group metals (Rh and Ru), planar deformation features (pdfs) in fine silt-size fragmental grains of quartz, as well as orthoclase, and monazite (with an abundance of Rare Earth Elements -- REEs). If the candidate site is ‘black mat’, correlative with the ‘black mat’ sites of North America, such an extensive occurrence may support the hypothesized airburst/impact over the Laurentide Glacier, which led to a reversal of Allerød warming and the onset of YD cooling and readvance of glaciers. While this finding does not confirm such, it merits further investigation,which includes the reconnaissance for additional sites in South America. Furthermore, if confirmed, such an extensive occurrence may corroborate an impact origin. © 2009 Elsevier B.V. All rights reserved. http://www.scribd.com/doc/54163938/Evidence-for-a-cosmogenic-origin-of-fired-glaciofluvial-beds-in-the-northwestern-Andes-Correlation-with-experimentally-heated-quartz-and-feldspar Sedimentary Geology 231 (2010) 31-40 Evidence for a cosmogenic origin of fired glaciofluvial beds in the northwestern Andes: Correlation with experimentally heated quartz and feldspar William C. Mahaney a,⁎, David Krinsley b, Volli Kalm c a Quaternary Surveys, 26 Thornhill Ave., Thornhill, Ontario, Canada L4J 1JS4 b Department of Geological Sciences, University of Oregon, Eugene, OR, USA 97403-1272 c Institute of Ecology and Earth Sciences, Tartu University, Tartu, Estonia 50411 a r t i c l e i n f o a b s t r a c t
[meteorite-list] 99 Luft-bottles - sitting in my cabinet drawer
MikeG and Listers And this is one of the reasons but limited to of why I like to collect meteorite. No collection is the same and seeing your micro mount collection the the cork vials looks really cool and how you have it presented. Now have you found a way yet to present them if you were going to put them in a suit case of something of that nature? At any rate great collection with your micro mounts. Shawn Alan IMCA 1633 eBaystore http://shop.ebay.com/photophlow/m.html [meteorite-list] 99 Luft-bottles - sitting in my cabinet drawerMichael Gilmer meteoritemike at gmail.com Thu Apr 28 20:52:39 EDT 2011 Previous message: [meteorite-list] AD 225.4 Gram Haxtun meteorite H4/L4 Next message: [meteorite-list] 99 Luft-bottles - sitting in my cabinet drawer Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] Hi List, I finished converting my micromount storage from 3ml glass vials to 5ml glass vials - the latter have a larger storage capacity and have a wider neck to accomodate larger fragments. I keep most of my tiny frags, crumbs, and dust in these glass vials. As of now, I have 2 drawers filled with about 48 bottles each - this holds the majority of my micromount inventory. On average, each vial will hold about 2-5g of material, depending on the size of the fragments. I like these small bottles because they are air-tight, compact, and they let me see the contents at a glance. I also like the old school look of glass with corks. On the right is the NWA drawer, which holds all of my NWA micros. On the left is the drawer that holds named finds and falls (or non-NWA Saharans) Photo link - http://i268.photobucket.com/albums/jj24/Meteoritethrower/Meteorites/new-micros-vials.jpg In the photo, from the bottom left to upper right - Drawer 1 (non-NWA) Allende Al Haggounia Ash Creek Bassikounou Bensour Breja Camel Donga Canyon Diablo spheroids Canyon Diablo shale Canyon Diablo crater sand Carancas Chergach DaG 477 Dalgety Downs Daule Dawn(a) Dhofar 362 Dimmitt El Hammami Ghubara Gold Basin Holbrook Huckitta Imilac (skeletons) Juancheng Kilabo Koltsovo La Criolla Lahoma Lanton Lemmon Northbranch Norton County Nuevo Mercurio Pallasovka Park Forest Portales Valley SAU 504 Sulagiri Tamdakt Tatahouine Thuathe Travis(a) Tulia(b) Vaca Muerta Weston Zag Zunhua Drawer 2 (NWA) - (bottom left to upper right) 323 515 787 801 869 (peas) 869 (frags) 960 1877 2086 2778 (frags) 2778 (part slices) 2975 3134 3144 3152 3336 4292 4473 4528 4846 4688 4689 5054 5055 5129 5133 6026 (frags) 6026 (dust) 6075 6077 6080 6284 6287 6289 6391 6393 6387 6394 uNWA (peas) Loose olivines Loose chondrules Loose olivines Empty vials x6 Best regards, MikeG --- Galactic Stone Ironworks - Meteorites Amber 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 Previous message: [meteorite-list] AD 225.4 Gram Haxtun meteorite H4/L4 Next message: [meteorite-list] 99 Luft-bottles - sitting in my cabinet drawer Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] More information about the Meteorite-list mailing 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
[meteorite-list] AD: ebay auctions ending soon. (starry...@gmail.com)
Dear List Members, I have a few auctions ending soon: Below link: 1. Meteorite KOSCICE and MORASKO - http://shop.ebay.com/starrymet/m.html?_trksid=p4340.l2562 Please contact me if you have any questions: starry...@gmail.com Thank you everyone for looking Kind Regards, Lukas Smula www.artmet-meteoryty.pl ___ __ 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] 99 Luft-bottles - sitting in my cabinet drawer
Hi Shawn and List, Thanks everyone for the kind comments. Storing micromounts in glass vials is probably not the most efficient way to do it, but I grew tired of gemjars and membrane boxes. No offense to gemjars and membrane boxes of course! In fact, I plan to purchase some larger membrane boxes to store/display my polished amber pieces in, with backlighting. But, I found with gemjars, that the jars took up a lot of space in my cabinet. I can fit more vials into a drawer than gemjars. FWIW, I get my vials from eBay (one of the only things eBay is still good for). Strangely, I get them from a different seller every time because I cannot find a single seller who consistently keeps them in stock. I did have one seller who had them for several months running, but she eventually quit offering them. My goal is to fill up the 6 small drawers in my cabinet with vials. I have 4 drawers remaining, and I can fit about 48-50 vials in each drawer. So I have room to expand my current collection considerably. :) Best regards, MikeG --- Galactic Stone Ironworks - Meteorites Amber 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 4/29/11, Shawn Alan photoph...@yahoo.com wrote: MikeG and Listers And this is one of the reasons but limited to of why I like to collect meteorite. No collection is the same and seeing your micro mount collection the the cork vials looks really cool and how you have it presented. Now have you found a way yet to present them if you were going to put them in a suit case of something of that nature? At any rate great collection with your micro mounts. Shawn Alan IMCA 1633 eBaystore http://shop.ebay.com/photophlow/m.html [meteorite-list] 99 Luft-bottles - sitting in my cabinet drawerMichael Gilmer meteoritemike at gmail.com Thu Apr 28 20:52:39 EDT 2011 Previous message: [meteorite-list] AD 225.4 Gram Haxtun meteorite H4/L4 Next message: [meteorite-list] 99 Luft-bottles - sitting in my cabinet drawer Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] Hi List, I finished converting my micromount storage from 3ml glass vials to 5ml glass vials - the latter have a larger storage capacity and have a wider neck to accomodate larger fragments. I keep most of my tiny frags, crumbs, and dust in these glass vials. As of now, I have 2 drawers filled with about 48 bottles each - this holds the majority of my micromount inventory. On average, each vial will hold about 2-5g of material, depending on the size of the fragments. I like these small bottles because they are air-tight, compact, and they let me see the contents at a glance. I also like the old school look of glass with corks. On the right is the NWA drawer, which holds all of my NWA micros. On the left is the drawer that holds named finds and falls (or non-NWA Saharans) Photo link - http://i268.photobucket.com/albums/jj24/Meteoritethrower/Meteorites/new-micros-vials.jpg In the photo, from the bottom left to upper right - Drawer 1 (non-NWA) Allende Al Haggounia Ash Creek Bassikounou Bensour Breja Camel Donga Canyon Diablo spheroids Canyon Diablo shale Canyon Diablo crater sand Carancas Chergach DaG 477 Dalgety Downs Daule Dawn(a) Dhofar 362 Dimmitt El Hammami Ghubara Gold Basin Holbrook Huckitta Imilac (skeletons) Juancheng Kilabo Koltsovo La Criolla Lahoma Lanton Lemmon Northbranch Norton County Nuevo Mercurio Pallasovka Park Forest Portales Valley SAU 504 Sulagiri Tamdakt Tatahouine Thuathe Travis(a) Tulia(b) Vaca Muerta Weston Zag Zunhua Drawer 2 (NWA) - (bottom left to upper right) 323 515 787 801 869 (peas) 869 (frags) 960 1877 2086 2778 (frags) 2778 (part slices) 2975 3134 3144 3152 3336 4292 4473 4528 4846 4688 4689 5054 5055 5129 5133 6026 (frags) 6026 (dust) 6075 6077 6080 6284 6287 6289 6391 6393 6387 6394 uNWA (peas) Loose olivines Loose chondrules Loose olivines Empty vials x6 Best regards, MikeG --- Galactic Stone Ironworks - Meteorites Amber 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 Previous message: [meteorite-list] AD 225.4 Gram Haxtun meteorite H4/L4 Next message: [meteorite-list] 99 Luft-bottles - sitting in my cabinet
[meteorite-list] Quick Carancas Question
Hi List, What was the largest, single, recovered specimen of Carancas? (how big was it, and does anyone have a photo?) Best regards, MikeG --- Galactic Stone Ironworks - Meteorites Amber 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 __ 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
[meteorite-list] AD - 30% OFF Stanley Cup Sale - 2 Days Only - Vestans, Wrongs, Micros, Amber, and more.
Hi Collectors and Listees, As many of you know, now is the time for the greatest spectacle in professional sports - the Stanley Cup playoffs. No other sport can match the emotion, desperation, and excitement of a game seven matchup in sudden death overtime. Well, even if you don't give a rats arse about ice hockey playoffs, you can still take advantage by taking 30% off everything in the Galactic Stone store. Use coupon code bolts at checkout to get the discount. (bolts is the team nickname of my Tampa Bay Lightning) New items : Asteroid Dust (Vesta) - http://www.galactic-stone.com/product/nwa-3152--asteroid-dust-from-4-vesta-eucritic-regolith-vial Asteroid Vesta Riker display - http://www.galactic-stone.com/product/hedo-display-lot-of-four-meteorites-from-asteroid-vesta NWA 3152 Basaltic Eucrite endcut (892mg) - http://www.galactic-stone.com/product/nwa-3152--basaltic-eucrite-from-vesta--892mg-endcut NWA 787 (low-numbered L6 chondrite) endcut 1.55g - http://www.galactic-stone.com/product/nwa-787--scarce-early-saharan-l6-chondrite-polished-endcut-155g NWA 787 (low-numbered L6 chondrite) micros - http://www.galactic-stone.com/product/nwa-787--scarce-early-saharan-l6-chondrite-micromounts NWA 960 (Anomalous H/L/LL3 chondrite - super rare) micros - http://www.galactic-stone.com/product/nwa-960--rare-early-nwa-anomalous-hlll3-chondrite--micros NWA 3134 (EL6 chondrite - very rare type) micros - http://www.galactic-stone.com/product/nwa-3134--very-rare-el6-chondrite-only-56-known-low-tkw-micros NWA 3152 (basaltic eucrite) micros - http://www.galactic-stone.com/product/nwa-3152--basaltic-eucrite-from-vesta--micromounts NWA 4473 (diogenite - gorgeous and scarce) - http://www.galactic-stone.com/product/nwa-4473--stunning-fresh-diogenite-lunar-like-matrix-micromounts NWA 6290 (orthopyroxenitic diogenite) polished endcut 6.12g - http://www.galactic-stone.com/product/nwa-6290--strange-new-orthopyroxenitic-diogenite-from-vesta-612g NWA 6080 (LL4 breccia) polished endcut 3.64g - http://www.galactic-stone.com/product/nwa-6080--beautiful-ll4-chondrite-with-clasts-polished-endcut-364g NWA 6080 (LL4 breccia) polished slice 4.65g - http://www.galactic-stone.com/product/nwa-6080--beautiful-ll4-chondrite-with-clasts-polished-slice-465g Campo del Cielo (iron octahedrite) Pat Mulvany stabilized specimen 1.4kg - http://www.galactic-stone.com/product/campo-del-cielo-big-gleaming-silver-patina-iron-meteorite-146kg-1 Canyon Diablo (iron octahedrite) Pat Mulvany stabilized specimen 144g - http://www.galactic-stone.com/product/canyon-diablo-big-iron-meteorite-stable-nickel-silver-patina-144g METEORWRONGS! All meteorwrongs - http://www.galactic-stone.com/products/meteorwrongs LDG Wrong - http://www.galactic-stone.com/product/columbian-copal-looks-like-beautiful-libyan-desert-glass-17g Stony Wrong - http://www.galactic-stone.com/product/huge-moqui-marble-or-meteorwrong-100mm-diameter-hematite-sphere Iron Wrongs - http://www.galactic-stone.com/product/iron-meteorwrongs-clever-and-interesting-iron-silicate-slags Lunar Wrongs - http://www.galactic-stone.com/product/unar-meteorite-analog-meteorwrong-terrestrial-anorthosite-fragment FOSSIL AMBER COPAL - All amber and copal - http://www.galactic-stone.com/products/copal-amber Amber and copal with inclusions (insects, plants, etc) - http://www.galactic-stone.com/products/raw-rough-amber Baltic amber (Russia) - http://www.galactic-stone.com/products/baltic-amber Bitterfield amber (Germany) - http://www.galactic-stone.com/products/bitterfield-amber Borneo amber (Malaysia) - http://www.galactic-stone.com/products/borneo-amber Chiapas amber (Mexico) - http://www.galactic-stone.com/products/chiapas-amber Dominican amber (Dominican Republic) - http://www.galactic-stone.com/products/dominican-amber Polish amber (Gdansk) - http://www.galactic-stone.com/products/polish-amber Colombian copal (Colombia) - http://www.galactic-stone.com/products/copal-columbian Kauri copal (New Zealand) - http://www.galactic-stone.com/products/kauri-copal Madagascar copal - http://www.galactic-stone.com/products/copal--madagascar Amber lots (multiple pieces each) - http://www.galactic-stone.com/products/lots--multiple-pieces Amber starter collection - http://www.galactic-stone.com/product/amber-starter-collection--five-different-global-amber-types If you have any problems with the checkout or coupon, feel free to contact me at - meteoritem...@gmail.com Thanks for looking and have a great weekend! MikeG PS - Game one of Capitals versus the Lightning is tonight at 7pm. Check your local listings! :) -- --- Galactic Stone Ironworks - Meteorites Amber 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 -
[meteorite-list] My first classification - NWA 6696 (LL3.6)
Hi List, Some new meteorites were added to the Met Bulletin today, including some new lunars. Hidden amongst the more exciting lunars is an unassuming LL3.6 - NWA 6696. This small 10g stone came in a batch of unclassified NWA that I purchased about 3 years ago. Upon windowing this small stone, I saw an adundance of armored chondrules. At first glance, it resembled a CR type. I posted some photos to this list, a minor discussion ensued, and then the sample went off to the lab to be looked at by Dr. Alan Rubin. Of course, it's not worthwhile for anyone to classify such a small OC when the 20/20 classification sample would only be 2 grams. So I offered to reverse the usual 20/20 arrangement - I'd keep 2 grams and the lab could keep the 8g main mass. Now the classification is official. I was hoping to sneak my name into the literature, but alas, I didn't get to see my name in lights. LOL It should be noted, that for collectors, this is going to be one of those impossible to acquire NWAs. Given the low TKW and that 80% of the mass is sitting at UCLA, that leaves a scant 2g on the collector market. A while back, I swapped a small endcut to Greg Catterton and I still retain a 1g slice that is polished on one side. If anyone wants to make me an insane offer for the remaining 1g slice, I will entertain all such offers. ;) From the write-up : Northwest Africa 6696 (NWA 6696) Morocco Purchased: 2007 Classification: Ordinary chondrite (LL3.6) Classification: Ordinary chondrite, LL3.7. The olivine Fa distribution (Fa24.4±9.1) and low-Ca pyx Fs distribution (Fs12.3±7.1) are appreciably more heterogeneous than those of Dhajala (type 3.8), indicating a subtype 3.8. The meteorite contains abundant low-Ca clinopyroxene with polysynthetic twinnning (indicating type 4) and moderately abundant fine-grained matrix material (most consistent with type 3.0-3.6). Clear chondrule glass is most abundant in type 3.0-3.5; this meteorite lacks clear chondrule glass, implying a subtype 3.5. Hence, 3.6 seems the most likely subtype. Best regards, MikeG --- Galactic Stone Ironworks - Meteorites Amber 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 __ 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] My first classification - NWA 6696 (LL3.6)
Hi Mike, List, Congrat's on your classification! The way you described the meteorite as having armored chondrules and thinking it was possibly a CR, then finding out it's an LL 3.6 made me think of a very similar scenario that has recently played out for me. I thought a chondrite I bought in 2008 was possibly a CR as did some other list members and it turned out to be an LL 3.8. I'd like to see pictures of yours Mike, I wonder if it looks similar. Here's a link to pic's of my new classifications, NWA 6581, ( LL 6) and NWA 6582, the LL 3.8. http://s934.photobucket.com/albums/ad190/alienrockfarm/ I saw that yours is 1 of only 16 meteorites with that classification, so despite its unassuming status amongst a pile of lunars and such, it's still a rarity! Sincerely, Larry Atkins IMCA # 1941 Ebay alienrockfarm -Original Message- From: Galactic Stone Ironworks meteoritem...@gmail.com To: Meteorite List meteorite-list@meteoritecentral.com Sent: Fri, Apr 29, 2011 11:41 am Subject: [meteorite-list] My first classification - NWA 6696 (LL3.6) Hi List, Some new meteorites were added to the Met Bulletin today, including some new lunars. Hidden amongst the more exciting lunars is an unassuming LL3.6 - NWA 6696. This small 10g stone came in a batch of unclassified NWA that I purchased about 3 years ago. Upon windowing this small stone, I saw an adundance of armored chondrules. At first glance, it resembled a CR type. I posted some photos to this list, a minor discussion ensued, and then the sample went off to the lab to be looked at by Dr. Alan Rubin. Of course, it's not worthwhile for anyone to classify such a small OC when the 20/20 classification sample would only be 2 grams. So I offered to reverse the usual 20/20 arrangement - I'd keep 2 grams and the lab could keep the 8g main mass. Now the classification is official. I was hoping to sneak my name into the literature, but alas, I didn't get to see my name in lights. LOL It should be noted, that for collectors, this is going to be one of those impossible to acquire NWAs. Given the low TKW and that 80% of the mass is sitting at UCLA, that leaves a scant 2g on the collector market. A while back, I swapped a small endcut to Greg Catterton and I still retain a 1g slice that is polished on one side. If anyone wants to make me an insane offer for the remaining 1g slice, I will entertain all such offers. ;) From the write-up : Northwest Africa 6696 (NWA 6696) Morocco Purchased: 2007 Classification: Ordinary chondrite (LL3.6) Classification: Ordinary chondrite, LL3.7. The olivine Fa distribution (Fa24.4±9.1) and low-Ca pyx Fs distribution (Fs12.3±7.1) are appreciably more heterogeneous than those of Dhajala (type 3.8), indicating a subtype 3.8. The meteorite contains abundant low-Ca clinopyroxene with polysynthetic twinnning (indicating type 4) and moderately abundant fine-grained matrix material (most consistent with type 3.0-3.6). Clear chondrule glass is most abundant in type 3.0-3.5; this meteorite lacks clear chondrule glass, implying a subtype 3.5. Hence, 3.6 seems the most likely subtype. Best regards, MikeG - -- Galactic Stone Ironworks - Meteorites Amber 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 - --- __ 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] My first classification - NWA 6696 (LL3.6)
Hi Larry, Gary and List, Here are some photos of NWA 6696 - http://s268.photobucket.com/albums/jj24/Meteoritethrower/Meteorites/chondrules/ I have a few more on my HD somewhere, but there isn't much to see on such a small stone. My only regret is that the stone is so small. The matrix is wall-to-wall chondrules, many of which are surrounded by a thin rim of metal. This stone just goes to show (as Larry said) that visual pairings are misleading. I'd seen photos of CR stones that looked exactly like my specimen. The main reason I submitted it is because I was confident it was a CR. Then I was pleasantly surprised by the LL3.6 classification, given the presence of visually-abundant metal. A large stone like this would produce some very attractive slices. Of course, like many chondrule-rich OC's, the look is not improved by polishing. The chondrules darken and become invisible when polished (except for a few of the whitish colored ones). So I left one side of my remaining slice unpolished. By virtue of numbers, this LL3.6 is more scarce than a CR. There are 115 approved CR meteorites and only 16 LL3.6 stones. It's good to know that my stone is in good company with Parnallee and is sitting in a UCLA cabinet where it might contribute to science in some way. :) Best regards, MikeG --- Galactic Stone Ironworks - Meteorites Amber 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 4/29/11, Larry Atkins thetop...@aol.com wrote: Hi Mike, List, Congrat's on your classification! The way you described the meteorite as having armored chondrules and thinking it was possibly a CR, then finding out it's an LL 3.6 made me think of a very similar scenario that has recently played out for me. I thought a chondrite I bought in 2008 was possibly a CR as did some other list members and it turned out to be an LL 3.8. I'd like to see pictures of yours Mike, I wonder if it looks similar. Here's a link to pic's of my new classifications, NWA 6581, ( LL 6) and NWA 6582, the LL 3.8. http://s934.photobucket.com/albums/ad190/alienrockfarm/ I saw that yours is 1 of only 16 meteorites with that classification, so despite its unassuming status amongst a pile of lunars and such, it's still a rarity! Sincerely, Larry Atkins IMCA # 1941 Ebay alienrockfarm -Original Message- From: Galactic Stone Ironworks meteoritem...@gmail.com To: Meteorite List meteorite-list@meteoritecentral.com Sent: Fri, Apr 29, 2011 11:41 am Subject: [meteorite-list] My first classification - NWA 6696 (LL3.6) Hi List, Some new meteorites were added to the Met Bulletin today, including some new lunars. Hidden amongst the more exciting lunars is an unassuming LL3.6 - NWA 6696. This small 10g stone came in a batch of unclassified NWA that I purchased about 3 years ago. Upon windowing this small stone, I saw an adundance of armored chondrules. At first glance, it resembled a CR type. I posted some photos to this list, a minor discussion ensued, and then the sample went off to the lab to be looked at by Dr. Alan Rubin. Of course, it's not worthwhile for anyone to classify such a small OC when the 20/20 classification sample would only be 2 grams. So I offered to reverse the usual 20/20 arrangement - I'd keep 2 grams and the lab could keep the 8g main mass. Now the classification is official. I was hoping to sneak my name into the literature, but alas, I didn't get to see my name in lights. LOL It should be noted, that for collectors, this is going to be one of those impossible to acquire NWAs. Given the low TKW and that 80% of the mass is sitting at UCLA, that leaves a scant 2g on the collector market. A while back, I swapped a small endcut to Greg Catterton and I still retain a 1g slice that is polished on one side. If anyone wants to make me an insane offer for the remaining 1g slice, I will entertain all such offers. ;) From the write-up : Northwest Africa 6696 (NWA 6696) Morocco Purchased: 2007 Classification: Ordinary chondrite (LL3.6) Classification: Ordinary chondrite, LL3.7. The olivine Fa distribution (Fa24.4±9.1) and low-Ca pyx Fs distribution (Fs12.3±7.1) are appreciably more heterogeneous than those of Dhajala (type 3.8), indicating a subtype 3.8. The meteorite contains abundant low-Ca clinopyroxene with polysynthetic twinnning (indicating type 4) and moderately abundant fine-grained matrix material (most consistent with type 3.0-3.6). Clear chondrule glass is most abundant in type 3.0-3.5; this meteorite lacks clear chondrule glass, implying a subtype 3.5. Hence, 3.6 seems the most
Re: [meteorite-list] My first classification - NWA 6696 (LL3.6)
Way to go Mike, congrats! I am happy to say this piece: http://i268.photobucket.com/albums/jj24/Meteoritethrower/Meteorites/chondrules/slice-close-chondrules-rough.jpg Is sitting in my display case now with a NWA number, very cool! Greg Catterton www.wanderingstarmeteorites.com IMCA member 4682 On Ebay: http://stores.shop.ebay.com/wanderingstarmeteorites On Facebook: http://www.facebook.com/WanderingStarMeteorites --- On Fri, 4/29/11, Galactic Stone Ironworks meteoritem...@gmail.com wrote: From: Galactic Stone Ironworks meteoritem...@gmail.com Subject: Re: [meteorite-list] My first classification - NWA 6696 (LL3.6) To: Larry Atkins thetop...@aol.com Cc: meteorite-list@meteoritecentral.com Date: Friday, April 29, 2011, 2:28 PM Hi Larry, Gary and List, Here are some photos of NWA 6696 - http://s268.photobucket.com/albums/jj24/Meteoritethrower/Meteorites/chondrules/ I have a few more on my HD somewhere, but there isn't much to see on such a small stone. My only regret is that the stone is so small. The matrix is wall-to-wall chondrules, many of which are surrounded by a thin rim of metal. This stone just goes to show (as Larry said) that visual pairings are misleading. I'd seen photos of CR stones that looked exactly like my specimen. The main reason I submitted it is because I was confident it was a CR. Then I was pleasantly surprised by the LL3.6 classification, given the presence of visually-abundant metal. A large stone like this would produce some very attractive slices. Of course, like many chondrule-rich OC's, the look is not improved by polishing. The chondrules darken and become invisible when polished (except for a few of the whitish colored ones). So I left one side of my remaining slice unpolished. By virtue of numbers, this LL3.6 is more scarce than a CR. There are 115 approved CR meteorites and only 16 LL3.6 stones. It's good to know that my stone is in good company with Parnallee and is sitting in a UCLA cabinet where it might contribute to science in some way. :) Best regards, MikeG --- Galactic Stone Ironworks - Meteorites Amber 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 4/29/11, Larry Atkins thetop...@aol.com wrote: Hi Mike, List, Congrat's on your classification! The way you described the meteorite as having armored chondrules and thinking it was possibly a CR, then finding out it's an LL 3.6 made me think of a very similar scenario that has recently played out for me. I thought a chondrite I bought in 2008 was possibly a CR as did some other list members and it turned out to be an LL 3.8. I'd like to see pictures of yours Mike, I wonder if it looks similar. Here's a link to pic's of my new classifications, NWA 6581, ( LL 6) and NWA 6582, the LL 3.8. http://s934.photobucket.com/albums/ad190/alienrockfarm/ I saw that yours is 1 of only 16 meteorites with that classification, so despite its unassuming status amongst a pile of lunars and such, it's still a rarity! Sincerely, Larry Atkins IMCA # 1941 Ebay alienrockfarm -Original Message- From: Galactic Stone Ironworks meteoritem...@gmail.com To: Meteorite List meteorite-list@meteoritecentral.com Sent: Fri, Apr 29, 2011 11:41 am Subject: [meteorite-list] My first classification - NWA 6696 (LL3.6) Hi List, Some new meteorites were added to the Met Bulletin today, including some new lunars. Hidden amongst the more exciting lunars is an unassuming LL3.6 - NWA 6696. This small 10g stone came in a batch of unclassified NWA that I purchased about 3 years ago. Upon windowing this small stone, I saw an adundance of armored chondrules. At first glance, it resembled a CR type. I posted some photos to this list, a minor discussion ensued, and then the sample went off to the lab to be looked at by Dr. Alan Rubin. Of course, it's not worthwhile for anyone to classify such a small OC when the 20/20 classification sample would only be 2 grams. So I offered to reverse the usual 20/20 arrangement - I'd keep 2 grams and the lab could keep the 8g main mass. Now the classification is official. I was hoping to sneak my name into the literature, but alas, I didn't get to see my name in lights. LOL It should be noted, that for collectors, this is going to be one of those impossible to acquire NWAs. Given the low TKW and that 80% of the mass is sitting at UCLA, that leaves a scant 2g on the collector market. A while back, I swapped a small endcut to
[meteorite-list] POP QUIZ FRIDAYS
Hello Listers, Spring is here and so is another installment of POP QUIZ FRIDAYS. Name of the game be the 10th Lister to email me off the List with the correct answer and win a free McKenzie Draw(B) meteorite fragment found in Texas, USA in the summer of 1989 while a farmer was plowing a peanut field. Question: Please tell me which meteorite fall was one of the first falls to be recognized by scientists as a rock from space. Good Luck Shawn Alan IMCA 1633 eBaystore http://shop.ebay.com/photophlow/m.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
[meteorite-list] Mars Odyssey THEMIS Images: April 25-29, 2011
MARS ODYSSEY THEMIS IMAGES April 25-29, 2011 o Windstreaks (25 April 2011) http://themis.asu.edu/node/5629 o Rabe Crater Dunes (26 April 2011) http://themis.asu.edu/node/5630 o Eos Chaos (27 April 2011) http://themis.asu.edu/node/5631 o Candor Chasma (28 April 2011) http://themis.asu.edu/node/5632 o Ascraeus Mons (29 April 2011) http://themis.asu.edu/node/5633 All of the THEMIS images are archived here: http://themis.asu.edu/latest.html NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in co.oration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena. __ 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] AD: Whitecourt iron etched slices
Dear List members... and friends of the new crater forming new Canadian iron Whitecourt. I have prepared a few more slices. All show excellent structure. Slices from large to small for everyone.. Please see my ebay shop or search in ebay Whitecourt Meteorite http://stores.ebay.com/Mirko-Graul-Meteorite?_rdc=1 Best regards Mirko Mirko Graul Meteorite Quittenring.4 16321 Bernau GERMANY Phone: 0049-1724105015 E-Mail: m_gr...@yahoo.de WEB: www.meteorite-mirko.de Member of The Meteoritical Society (International Society for Meteoritics and Planetery Science) IMCA-Member: 2113 (International Meteorite Collectors Association) --- Mirko Graul m_gr...@yahoo.de schrieb am Do, 28.4.2011: Von: Mirko Graul m_gr...@yahoo.de Betreff: [meteorite-list] AD: Whitecourt iron etched slices An: meteorite-list@meteoritecentral.com Datum: Donnerstag, 28. April, 2011 11:25 Uhr Dear List Members, i have listed on ebay 5 best etched slices and endcuts of Whitecourt iron. This 5 etched pieces shows very good structure! Endcut 4.549g http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=230614663627ssPageName=STRK:MESELX:IT --- Full slice 7.090g http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=370505373224ssPageName=STRK:MESELX:IT --- Full slice 8.086g http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=370505374223ssPageName=STRK:MESELX:IT --- Full slice with Troilite inclusion 6.876g http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=230614661985ssPageName=STRK:MESELX:IT --- Large endcut with Troilite inclusion 20.5g http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=230614660549ssPageName=STRK:MESELX:IT --- All slices including a copy of the Export permit. Best regards Mirko Mirko Graul Meteorite Quittenring.4 16321 Bernau GERMANY Phone: 0049-1724105015 E-Mail: m_gr...@yahoo.de WEB: www.meteorite-mirko.de Member of The Meteoritical Society (International Society for Meteoritics and Planetery Science) IMCA-Member: 2113 (International Meteorite Collectors Association) __ 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
[meteorite-list] Asteroid Impacts in Antarctica?
http://www.cosmosmagazine.com/features/online/4267/asteroid-impacts-antarctica Asteroid impacts in Antarctica by Richard A. Lovett COSMOS Magazine 28 April 2011 In a controversial study, gravity maps of the Antarctic continent have revealed what could be multiple asteroid impact sites. Gravity anomalies in Antarctica might mark spots where hundreds of thousands of years ago the frozen continent was struck by giant meteorites or fragments of a comet. These, scientists suggest, would have punched deep into the crust, shattering rock and producing zones of slightly lower gravity waiting to be found by modern instruments. Such instruments, carried aboard satellites, aeroplanes, and snow machines, can measure the Earth's gravity field with remarkable precision. The gravity meter we used [is so sensitive] that if I should set it on a desk and read the gravity from it, then set it on the floor, I can detect the difference, says John Weihaupt a geophysicist at the University of Colorado. As far back as 1976, Weihaupt found a large region of low gravity in Antarctica's Victoria Land that he believes to be a meteor impact crater, at least 243 km across - about three times as wide as America's Chesapeake Bay, also believed to have been formed by an asteroid impact. But in new gravity maps of the entire continent published in the journal Lithosphere, Weihaupt's team found 14 additional such anomalies, which they think might mark the sites of additional impacts. The anomalies could be caused by other under-ice features, such as buried mountains or tectonic trenches. But there is no evidence for such features beneath this part of Antarctica, Weihaupt's team said. Rather, they appear to be places where the impact not only created a depression, but also reduced the rock's density (and therefore its gravity) by shattering it into rubble, known as breccia. Shotgun blast Weihaupt thinks the number of anomalies means ancient Antarctica may have been peppered with a shotgun blast of space rocks up to 2 km across. Furthermore, he said, the anomalies are arrayed in an ellipse, with the largest at one end and the smallest at the other. This is exactly the pattern one gets from the distribution of meteorite craters in a multiple impact event, he said - i.e., a situation in which a large asteroid or comet breaks up before impact. When did the impact occur? That's a tricky question, Weihaupt says. A definitive answer would require drilling all the way through the ice to the underlying rocks. But impacts produce clouds of tiny particles called tektites (and smaller 'mirotectites') that later fall back to Earth. These have been found in Australia and in parts of Antarctica, in two layers, one dated to about 700,000 years ago, and the other to 481,000 years ago. Scientists have long speculated about the effect on civilisation if a large meteor struck a continent, filling the air with sunlight-blocking dust. But nobody has thought much about what would happen if hits ice. The ramification for the environment . . . and mankind . .. are enormous, Weihaupt's coauthor, Alan Rice, of the Department of Earth and Planetary Sciences at the American Museum of Natural History, New York, said. While NASA is combing the skies for the asteroid that will kill us all, no one has given thought to the response of the Antarctic Ice Cap if that got hit. One prospect, however, is that much of the ice would destabilise, rapidly flowing into the sea and increasing sea level by perhaps 5 metres. Other scientists are skeptical about whether the anomalies actually are craters. One problem, says Dallas Abbott, a marine geophysicist at Columbia University's Lamont-Doherty Earth Observatory at Columbia University's Lamont Doherty Earth Observatory is the mathematical techniques often used to rule out density variations in rocks deeper in the Earth. This introduces artefacts in the final data that are circular, she says - precisely the types of low-gravity blobs observed by Weihaupt's team. Nor, she adds, has she ever seen impact debris in Antarctic seabed cores matching impacts at the suggested sites. Mark Boslough a physicist at Sandia National Laboratories in Albuquerque who has studied the risk of impacts from near-Earth asteroids, agrees. Because large impact structures are extremely rare, any claim requires a very high standard of evidence, he said by email. Lots of features can masquerade as impact structures, and most turn out not to be. Weihaupt admits his theory is controversial. Nevertheless, he said, [It] has the potential to explain quite a number of unexplained features and phenomena related to the Antarctic - some of which we are not yet prepared to take to the scientific community. In other words, stay tuned. If a shotgun blast of big meteorites hitting the Antarctic sounds exciting, Weihaupt's team believes it is only beginning to make its case. __ Visit the Archives at
[meteorite-list] Mars Exploration Rovers Update: April 20-27, 2011
http://marsrovers.jpl.nasa.gov/mission/status.html SPIRIT UPDATE: Spirit Remains Silent at Troy - sols 2594-2601, April 21-28, 2011: No communication has been received from Spirit since Sol 2210 (March 22, 2010). Deep Space Network X-band listening and commanding covering a range of frequencies and local solar times on Mars is continuing. Selected over flights by the relay orbiters are exercised to elicit a response from the rover through the separate ultra-high frequency (UHF) system. Total odometry is unchanged at 7,730.50 meters (4.80 miles). OPPORTUNITY UPDATE: Opportunity Makes Three Drives This Week - sols 2573-2580, April 20-27, 2011: Opportunity continues the trek towards Endeavour crater. The rover drove on Sols 2574, 2576 and 2579 (April 21, 23 and 26, 2011), covering over 340 meters (1,115 feet) to the southeast. The rover's right front wheel motor currents have settled down some, but the project continues to monitor this. The plan ahead is more driving. As of Sol 2580 (April 27, 2011), solar array energy production was 381 watt-hours with an elevated atmospheric opacity (Tau) of 0.870 and a solar array dust factor of 0.507. Total odometry is 28,384.22 meters (28.38 kilometers, or 17.64 miles). __ 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
[meteorite-list] Bacteria Found to Survive 'Hypergravity'
http://www.cbsnews.com/stories/2011/04/27/scitech/main20058032.shtml Bacteria found to survive hypergravity CBS News April 27, 2011 Study finds that bacteria can grow despite extreme gravity, raising possibility that life may have arrived here via comet Talk about hearty bacteria. A new study http://www.pnas.org/content/early/2011/04/20/1018027108.abstract?sid=99952caa-85c5-4a26-8c02-88c78b26bf67 published in the Proceedings of the National Academy of Sciences, reports that some bacteria can exist even in extreme hypergravity. In other words, they can still live and breed despite gravitational forces that are 400,000 times greater than what's felt here on Earth. But the real importance of the research is in what it suggests: In concluding that the habitability of extraterrestrial environments must not be limited by gravity, the researchers raise the possibility that alien life also might be able to survive after meteorite impacts and take root on Earth. Our results indicate that microorganisms cannot only survive during hyperacceleration but can display such robust proliferative behavior that the habitability of extraterrestrial environments must not be limited by gravity, the researchers note in their paper. There is a body of scientific argument which contends that life on Earth may have come from outer space http://science.nationalgeographic.com/science/space/solar-system/asteroids-comets-article.html in the form of microbes which attached themselves to comets and meteorites. While careful not to directly wade into that debate, Shigeru Deguchi of the Japan Agency of Marine-Earth Science and Technology in Yokosuka and the report's lead author said the number and types of environments that we now think life can inhabit in the universe has expanded because of our study, said Deguchi. http://www.upi.com/Science_News/2011/04/25/Bacteria-seen-surviving-hypergravity/UPI-21271303779427/#ixzz1KlD5KhBD He noted that E. coli tested in the experiments was able to withstand the impact of the equivalent of 7,500 G's. By comparison, humans will black out when hit by forces anywhere between three to five times the Earth's surface gravity. __ 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
[meteorite-list] Poison Key to Early Life
http://news.discovery.com/space/life-poison-earth-organics-110425.html Poison Key to Early Life How did Earth manage to hold onto its organics after being slammed by a Mars-sized object 4.4 billion years ago? By Irene Klotz Discovery News April 25, 2011 * Formaldehyde may be the delivery mechanism for organics on Earth -- and throughout the solar system. * The finding is ironic since formaldehyde is poison to life as we know it. * The discovery stems from analysis of samples from NASA's Stardust comet probe. How baby Earth managed to keep hold of its organic matter after the clubbing it took by a Mars-sized object roughly 4.4 billion years ago has long puzzled scientists. The throttling was so severe scientists believe Earth melted. Splatters that ended up in space eventually came together to form the moon. Lightweight materials, like water and carbon, would have vaporized. How then did the building blocks for life manage to survive? Scientists think they have found the answer: The organics were locked in stable chains formed from formaldehyde, an ironic finding considering that formaldehyde ended up being poisonous to the very life it may have made possible. Formaldehyde is very interesting, very reactive. It can even react with itself and form complex polymers, George Cody, a senior scientist at the Carnegie Institution of Washington, told Discovery News. Formaldehyde also is plentiful in molecular clouds in space, meaning ample quantities would have been around for incorporation into the solar system's population. Two chains of evidence support this theory. First, organic solids have been found in meteorites and in comets. A sample from NASA's Stardust comet mission gave Cody and colleagues a sign they were on the right path. It was about the most chemically complex material I had ever seen in my life, Cody said. Scientists then turned to lab work to reproduce the type of organic matter found in carbonaceous chondrites, a type of organic-rich meteorite, from formaldehyde. They found their formaldehyde-synthesized material was similar to what has been found in carbonaceous chondrites and from Comet Wild 2, which was sampled by NASA's Stardust probe. The experiments also showed the organics would survive temperatures of up to 1,400 Centigrade (2,552 degrees Fahrenheit). The formaldehyde forms these little tiny organic balls, Cody said. Other molecules found in space, such as hydrogen cyanide, also could polymerize with itself, but they fall apart in hot water, Cody added. Formaldehyde is almost unique in its tendency to hang out -- and hang on -- as the solar system got hotter and dryer, said Cody. Also buttressing the team's findings is a related study showing that comets may be much more watery than previously thought. If liquid water environments were common, than there are a lot more places to produce pre-biotic material, Dante Lauretta, associate professor at the University of Arizona's Lunar and Planetary Laboratory, told Discovery News. Now that we know what we're working with, we want to understand the chemistry better, added Cody. Cody's research was reported in the /Proceedings of the National Academy of Sciences earlier this month. Lauretta's team, which also studied Stardust samples, is publishing in the online edition of the journal Geochimica et Cosmochimica Acta. __ 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
[meteorite-list] NWA basalt?
I found an odd little stone in a batch of unclassified material. Most of the non-meteoritic material I've culled out in the past hasn't really resembled basalt like this one. Slight attraction to a magnet and studded with what I assume to be very clear little blobs of olivine. I posted a couple of pictures here: http://s25.photobucket.com/albums/c57/pkmorgan/mystery/ What is the general geology of the area and is something like this common? Thanks, Phil __ 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] NWA basalt?
Hi Phil, Maybe I am an incurable optimist, but that looks like an achondrite of some sort. I'd be curious to hear what some qualified persons would say about it. Best regards, MikeG --- Galactic Stone Ironworks - Meteorites Amber 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 4/29/11, Phil Morgan roxfromsp...@gmail.com wrote: I found an odd little stone in a batch of unclassified material. Most of the non-meteoritic material I've culled out in the past hasn't really resembled basalt like this one. Slight attraction to a magnet and studded with what I assume to be very clear little blobs of olivine. I posted a couple of pictures here: http://s25.photobucket.com/albums/c57/pkmorgan/mystery/ What is the general geology of the area and is something like this common? Thanks, Phil __ 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
[meteorite-list] FL, GA, AL large meteor 29APR2011
Dear List, Just Breaking-- Large Meteor Fireball with sonic boom reported in Alabama, Georgia, and Florida at 9:15 CDT //~10:00 pm EDT. http://lunarmeteoritehunters.blogspot.com/2011/04/florida-georgia-alabama-large-meteor.html Best Regards, 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
