DOCSLIB.ORG

Takysie Lake – the Classic “Pseudometeorite” – Found by Harvey H

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Takysie Lake – the Classic “Pseudometeorite” – Found by Harvey H Meteorite Times Magazine Contents Paul Harris Featured Articles Accretion Desk by Martin Horejsi Jim’s Fragments by Jim Tobin Bob’s Findings by Robert Verish Micro Visions by John Kashuba Norm’s Tektite Teasers by Norm Lehrman IMCA Insights by The IMCA Team Meteorite of the Month by Editor Tektite of the Month by Editor Terms Of Use Materials contained in and linked to from this website do not necessarily reflect the views or opinions of The Meteorite Exchange, Inc., nor those of any person connected therewith. In no event shall The Meteorite Exchange, Inc. be responsible for, nor liable for, exposure to any such material in any form by any person or persons, whether written, graphic, audio or otherwise, presented on this or by any other website, web page or other cyber location linked to from this website. The Meteorite Exchange, Inc. does not endorse, edit nor hold any copyright interest in any material found on any website, web page or other cyber location linked to from this website. The Meteorite Exchange, Inc. shall not be held liable for any misinformation by any author, dealer and or seller. In no event will The Meteorite Exchange, Inc. be liable for any damages, including any loss of profits, lost savings, or any other commercial damage, including but not limited to special, consequential, or other damages arising out of this service. © Copyright 2002–2016 The Meteorite Exchange, Inc. All rights reserved. No reproduction of copyrighted material is allowed by any means without prior written permission of the copyright owner. Meteorite Times Magazine Oriented Canyon Diablo Meteorite? I hope so. Martin Horejsi The irons and iron fragments from Canyon Diablo or Meteorite Crater, or Meteor Crater, or Barringer Crater, or Coon Mountain or any of several other names is a staple in every collection. From huge display pieces to micro mounts, Canyon Diablo, or CDs, are important representative of meteorite history, meteorite science, and meteorite collecting. So as a meteorite collector, I have many specimens of Canyon Diablo from near-microscopic metallic spheroids, to multi-kilo individuals. I have polished specimens, rusty fragments, and beautiful individuals with unique shapes and holes. But one that has peaked my interest lately is a 2.5kg individual that sure looks like it could be oriented. In a nutshell, its triangular with a bulged convex face on one side and a lightly concave face on the other side. I’ve yet to find any documented reports of oriented individuals of Canyon Diablo, but I have heard that many folks don’t think there are. In addition to looking at hundreds or more likely thousands of CD specimens, three other sources are my go-tos for info on Canyon Diablo. One is a 1972 article simply tiled “The Canyon Diablo Meteorite” by the Soviet scientist Gennady P. Vdovykin. Another source is Jim Tobin’s book (now in it’s third edition) titled Meteor Crater. Any my final go-to source is, of course, the 1972 edition of Handbook of iron meteorites, their history, distribution, composition, and structure by Vagn F. Buchwald. So in this installment of The Accretion Desk, I am presenting a series of pictures the highlight the shape of the individual I’m wondering about. Could this be an oriented Canyon Diablo? I’d like to think so, but please comment. Not that consensus will make it so, but I’m certainly curious about what other see in this individual. Meteorite Times Magazine Before and After Holbrook and Meteor Crater Trip James Tobin I am heading out to the Holbrook strewnfield in a few days. I missed the hundredth anniversary gathering/hunt and all the yearly ones since. Paul and I did get out there several years ago for a very successful two days of hunting. This year I am going to go to the yearly hunt. When I was working full time it was difficult to take off and to drive the roughly 1300 miles by myself to get to Holbrook and back home. Now that I am retired it is not as hard to go and this year I am excited to see the place again. Of all the places I have hunted meteorites Holbrook is one I have been quite successful at. I know that others have been much more successful but many of them live closer and can visit more often. I have been there on three trips and spent about four days total hunting. I have recovered just about 100 specimens. I have written about those trips before and won’t go over the material again. As I write this I have begun charging camera batteries and started getting my hunting stuff together. Some is still in the pack I used at Gold Basin last November. I won’t use that at Holbrook. I usually just carry a water bottle and my magnet stick at Holbrook. I keep my cellphone and GPS in my pockets. When I find a stone I lay the GPS next to it and take an image put it in a baggie with something written on the outside and move on. I am riding along with Richard Garcia on this trip. Richard and I have hunted together a few times before and it is always fun. It has been a while so I am looking forward to having the chance to catch up. I had just one request when we first planned going. I needed to stop at Meteor Crater to take some images for the new book I am writing. It is about the crater again but just a one year period in the history, so much narrower than the historical books I have written before. Richard said he was planning on stopping himself so that was perfect. I could not find my travel tripod. It is collapsible and reasonably sturdy. But after several hours of hunting everywhere I can not find it. So I ordered a new one. I really have never bought a modern tripod. I have some antiques made of wood that I have bought at swap meets but not an aluminum modern one. They have all come as part of camera packages or lenses offers. I decided that since my images are going to be extreme telephoto shots to get one that was pretty sturdy but still portable. I also did not want to break the bank on a tripod. I found a nice one on Amazon that was $100 off regular price and had great reviews for about $90. It also came apart to work as a monopole which is good as I can use the anti shake help sometimes. I have a wonderful 70-300 mm telephoto made by Tamron for my Canons. It is sharp as a tack and good for most everything including my astro imaging, but it was not going to get me across Meteor Crater or to places around the crater I wanted to shoot. The south road is pretty far from the crater slope. I did not think I could get permission to visit those locations in the short lead time I had for this trip so I needed to reach out with telephoto lenses the best I could. I have used mirror lenses before and am well acquainted with the drawbacks that they have. But for price, weight and size they are hard to beat if used with care. The ones on the market today are both good and poor. I did a lot of searching on the net, and reading reviews again. I found one by a manufacturer I have had lens from before. It was very reasonable in price and reported to give a very sharp image at both the 500 mm normal setup and with the 2x tele extender. The sample photos in one of the reviews were very good. I doubt that I will do more than just try the 2x setup. That would be 1000 mm of focal length and an OK field of view if it was a full frame sensor camera. But with my APS sensor and a crop factor of 1.6 it would give me the field of view of a 1600 mm lens. I think that may be too restricted for what I need. But we will see. I will play with it when it arrives and with the tripod. The biggest negative most people have with mirror lenses is the donut shaped out of focus highlights. Anything bright in foreground or behind the point of focus will be a blurry donut. It starts out being a cool effect when you first try a mirror lens but it can quickly become a much less attractive feature. Even an annoying feature at times. I am shooting across Meteor Crater and everything should be at or very near infinity focus in my images. I should have very little depth of field. So no out of focus areas to become donuts. When used this way the lens is very handy to get distant objects at big magnification. The resolution charts in the reviews seems to be good though not as good as a refracting telephoto lens of the same focal length costing 30 times as much or more. You often do get what you pay for but sometimes almost as good is good enough and far less expensive. I am hoping that is what I will find with this mirror lens. I am taking my cellphone macro camera so I can image my Holbrook finds at night in the hotel room. I am taking a scale with me so I can weigh them.
Load more

Recommended publications
  • Ron Hartman and the Lucerne Valley Meteorites by Robert Verish Ron Hartman and the Lucerne Valley Meteorites
    Meteorite Times Magazine Contents by Editor Featured Monthly Articles Accretion Desk by Martin Horejsi Jim's Fragments by Jim Tobin Meteorite Market Trends by Michael Blood Bob's Findings by Robert Verish IMCA Insights by The IMCA Team Micro Visions by John Kashuba Meteorite Calendar by Anne Black Meteorite of the Month by Editor Tektite of the Month by Editor Terms Of Use Materials contained in and linked to from this website do not necessarily reflect the views or opinions of The Meteorite Exchange, Inc., nor those of any person connected therewith. In no event shall The Meteorite Exchange, Inc. be responsible for, nor liable for, exposure to any such material in any form by any person or persons, whether written, graphic, audio or otherwise, presented on this or by any other website, web page or other cyber location linked to from this website. The Meteorite Exchange, Inc. does not endorse, edit nor hold any copyright interest in any material found on any website, web page or other cyber location linked to from this website. The Meteorite Exchange, Inc. shall not be held liable for any misinformation by any author, dealer and or seller. In no event will The Meteorite Exchange, Inc. be liable for any damages, including any loss of profits, lost savings, or any other commercial damage, including but not limited to special, consequential, or other damages arising out of this service. © Copyright 2002–2011 The Meteorite Exchange, Inc. All rights reserved. No reproduction of copyrighted material is allowed by any means without prior written permission of the copyright owner.
    [Show full text]
  • Workshop on the Issue of Martian Meteorites 7027.Pdf
    Workshop on the Issue of Martian Meteorites 7027.pdf RECOVERING MORE ANTARCTIC MARTIAN METEORITES: ANSWERS TO COMMON QUESTIONS. R. P. Harvey1 and W. A. Cassidy2, 1Case Western Reserve University, Cleveland OH 44106-7216, USA ([email protected]), 2Department of Geology and Planetary Science, University of Pittsburgh, Pittsburgh PA 15260, USA ([email protected]). Introduction: Of the 13 Martian meteorites reported, they could, tell them from Earth rocks), they can help us almost half were collected in Antarctica. With the increased find exposed blue ice, and help us discern the shape and interest in Martian meteorite studies accompanying the re- topography of an icefield. These images speed up our re- port of possible biogenic activity in ALH84001, many have connaissance and greatly facilitate systematic searching wondered whether recoveries of Antarctic Martian meteor- efforts. They also serve as the only available basemap for ites could be enhanced or accelerated. Given that the recov- precisely locating our finds, given that many Antarctic ice- ery of Antarctic meteorites is a planned activity, (unlike the fields lie off existing topographical maps. recovery of non-Antarctic Martian meteorites via random finds and falls), such questions are worth considering. 3. If we sent an army of professional meteorite Listed below are several topical questions, followed by an- hunters, could we gather Martian meteorites more swers based on experience gathered during the 21 com- quickly? pleted field seasons of ANSMET (the Antarctic Search for The answer to this one is “maybe”. Success in Meteorites program). finding Antarctic meteorites depends on a lot of factors, of which manpower is only one.
    [Show full text]
  • Population Polygons of Tektite Specific Gravity for Various Localities in Australasia
    Reprinted from GEOCHIMICA ET COSMOCHIMICA ACTA Vol. 28, NO. 6,pp. 821-839 t II d 0 i (CA'TECORYI I {NASA CR OR TMX OR AD NUMBER1 ! POPULATION POLYGONS OF TEKTITE SPECIFIC GRAVITY FOR VARIOUS LOCALITIES IN AUSTRALASIA DEANR. CHAPMAN,HOWARD K. LARSONand LEROYC. SCHEIBER N.A.S.A., Ames Research Center, Moffett Field, California PERGAMON PRESS NEWYORK * OXFORD - LONDON - PARIS 1964 Geochimica et Cosmochimica Acta 1984, Val. 28, pp. 821 to 839. Pergamon Press Ltd. Printed in Northern Ireland Population polygons of tektite specific gravity for various localities in Australasia* DEANR. CHAPMAN,HOWARD K. LARSON and LEROYC. SCHEIBER N.A.S.A., Ames Research Ccnter, Moffett Field, California 31- Abstract-~Ieasurements of specific gravity by the method of liquid flotation have been made on about 6000 tektites from 18 different localities in Australasia, from 1 locality in Texas and 2 in Czechoslovakia. Comparison of specific-gravity population polygons for various localities has led to the unanticipated conclusion that the amtralite population in southwest Australia is essentially the same as the philippinite population, rather than the population elsewhere in Australia. The javanite population appears closely related to certain populations in Australia. In several localities the presence of two superimposed populations is demonstrated. The specific- gravity evidence indicates that the Australasian tektites represent a single event comprising many distinguishable clusters, some of which have partially overlapped. INTRODUCTION #e AT the turn of this century, the Austrian geologist SUESS(1900) gave the collective name of “tektites” to three widely separated groups of natural glass objects then known to be scattered over parts of Australia, Czechoslovakia and the island of Billiton.
    [Show full text]
  • Machine Learning for Semi-Automated Meteorite Recovery
    Machine Learning for Semi-Automated Meteorite Recovery Seamus Anderson1*, Martin Towner1, Phil Bland1, Christopher Haikings2,3, William Volante4, Eleanor Sansom1, Hadrien Devillepoix1, Patrick Shober1, Benjamin Hartig1, Martin Cupak1, Trent Jansen- Sturgeon1, Robert Howie1, Gretchen Benedix1, Geoff Deacon5 1Space Science and Technology Center, Curtin University, GPO Box U1987, Perth, WA 6845, Australia 2Spectre UAV Concepts, 191 St Georges Terrace, Perth, WA 6000, Australia 3Amotus Pty Ltd, Level 25/71 Eagle St, Brisbane City, QLD 4000, Australia 4Department of Psychology, Clemson University, 418 Brackett Hall, Clemson, SC, 29634 5Western Australian Museum, 49 Kew St, Welshpool, WA 6106, Australia *Corresponding author: E-mail: [email protected]. Abstract We present a novel methodology for recovering meteorite falls observed and constrained by fireball networks, using drones and machine learning algorithms. This approach uses images of the local terrain for a given fall site to train an artificial neural network, designed to detect meteorite candidates. We have field tested our methodology to show a meteorite detection rate between 75-97%, while also providing an efficient mechanism to eliminate false-positives. Our tests at a number of locations within Western Australia also showcase the ability for this training scheme to generalize a model to learn localized terrain features. Our model-training approach was also able to correctly identify 3 meteorites in their native fall sites, that were found using traditional searching techniques. Our methodology will be used to recover meteorite falls in a wide range of locations within globe- spanning fireball networks. Introduction Fireballs and meteors have been observed since antiquity by Chinese, Korean, Babylonian and Roman astronomers (Bjorkman 1973), while meteorites and their unique metallurgical properties have also been known and used by various cultures around the world from Inuit tools (Rickard 1941) to an Egyptian ceremonial dagger (Comelli et al.
    [Show full text]
  • X. Paleontology, Biostratigraphy
    BIBLIOGRAPHY OF THE GEOLOGY OF INDONESIA AND SURROUNDING AREAS Edition 7.0, July 2018 J.T. VAN GORSEL X. PALEONTOLOGY, BIOSTRATIGRAPHY www.vangorselslist.com X. PALEONTOLOGY, BIOSTRATIGRAPHY X. PALEONTOLOGY, BIOSTRATIGRAPHY ................................................................................................... 1 X.1. Quaternary-Recent faunas-microfloras and distribution ....................................................................... 60 X.2. Tertiary ............................................................................................................................................. 120 X.3. Jurassic- Cretaceous ........................................................................................................................ 161 X.4. Triassic ............................................................................................................................................ 171 X.5. Paleozoic ......................................................................................................................................... 179 X.6. Quaternary Hominids, Mammals and associated stratigraphy ........................................................... 191 This chapter X of the Bibliography 7.0 contains 288 pages with >2150 papers. These are mainly papers of a more general or regional nature. Numerous additional paleontological papers that deal with faunas/ floras from specific localities are listed under those areas in this Bibliography. It is organized in six sub-chapters: - X.1 on modern and sub-recent
    [Show full text]
  • The Aquarius Project: the First Student-Driven Underwater Meteorite Hunt
    The Aquarius Project: The First Student-Driven Underwater Meteorite Hunt Chris Bresky1, Marc Fries2, 1Adler Planetarium, Chicago IL, 2NASA JSC Astromaterials Research and Exploration Science (ARES), Houston TX Introduction Project Overview Ongoing Work Opportunities for Researchers On February 6, 2017, a sonic boom woke residents of the Midwest as a bright green fireball streaked across the sky. The American Meteor Society (AMS) calculated a ground track that terminated over Lake Michigan (Figure 1). Weather radar imagery showed a large meteorite fall, with all meteorites falling into the lake, off the coast of Wisconsin. The strewn field is in deep water (~100m) and no detailed maps of the lake bed exist in this region, so the subsurface environment is unknown and difficult to explore. We know of no previous systematic attempt at underwater recovery of meteorites. It is this combination of knowns and unknowns that has inspired high school students and science professionals from across Chicago to mount, “The Aquarius Project.” This multidisciplinary endeavor is the first student driven attempt at underwater meteorite retrieval. In an unprecedented collaboration, scientists and educators from The Field Museum, The Shedd Aquarium, and the Adler Planetarium’s Far Horizons Program are joining forces to support this expedition. Background Senior Research Biologist Dr. Philip Willink from the Shedd Aquarium works with the Aquarius Project Currently: Nearly 50 teens from these institutes are currently collaborating students to learn the techniques of lake bottom mapping through sonar. Once the lake bottom terrain is digitally to improve on the initial designs. They are engineering environmental understood, these teens will have a better idea of where to implement their meteorite hunting tools.
    [Show full text]
  • Meteorite-Times 2014 7.Pdf
    Meteorite Times Magazine Contents by Editor Featured Articles Accretion Desk by Martin Horejsi Jim’s Fragments by Jim Tobin Meteorite Market Trends by Michael Blood Bob’s Findings by Robert Verish Micro Visions by John Kashuba Norm’s Tektite Teasers by Norm Lehrman Mr. Monning’s Collection by Anne Black IMCA Insights by The IMCA Team Meteorite of the Month by Editor Tektite of the Month by Editor Terms Of Use Materials contained in and linked to from this website do not necessarily reflect the views or opinions of The Meteorite Exchange, Inc., nor those of any person connected therewith. In no event shall The Meteorite Exchange, Inc. be responsible for, nor liable for, exposure to any such material in any form by any person or persons, whether written, graphic, audio or otherwise, presented on this or by any other website, web page or other cyber location linked to from this website. The Meteorite Exchange, Inc. does not endorse, edit nor hold any copyright interest in any material found on any website, web page or other cyber location linked to from this website. The Meteorite Exchange, Inc. shall not be held liable for any misinformation by any author, dealer and or seller. In no event will The Meteorite Exchange, Inc. be liable for any damages, including any loss of profits, lost savings, or any other commercial damage, including but not limited to special, consequential, or other damages arising out of this service. © Copyright 2002–2014 The Meteorite Exchange, Inc. All rights reserved. No reproduction of copyrighted material is allowed by any means without prior written permission of the copyright owner.
    [Show full text]
  • Meteorite Impacts, Earth, and the Solar System
    Traces of Catastrophe A Handbook of Shock-Metamorphic Effects in Terrestrial Meteorite Impact Structures Bevan M. French Research Collaborator Department of Mineral Sciences, MRC-119 Smithsonian Institution Washington DC 20560 LPI Contribution No. 954 i Copyright © 1998 by LUNAR AND PLANETARY INSTITUTE The Institute is operated by the Universities Space Research Association under Contract No. NASW-4574 with the National Aeronautics and Space Administration. Material in this volume may be copied without restraint for library, abstract service, education, or personal research purposes; however, republication of any portion thereof requires the written permission of the Insti- tute as well as the appropriate acknowledgment of this publication. Figures 3.1, 3.2, and 3.5 used by permission of the publisher, Oxford University Press, Inc. Figures 3.13, 4.16, 4.28, 4.32, and 4.33 used by permission of the publisher, Springer-Verlag. Figure 4.25 used by permission of the publisher, Yale University. Figure 5.1 used by permission of the publisher, Geological Society of America. See individual captions for reference citations. This volume may be cited as French B. M. (1998) Traces of Catastrophe:A Handbook of Shock-Metamorphic Effects in Terrestrial Meteorite Impact Structures. LPI Contribution No. 954, Lunar and Planetary Institute, Houston. 120 pp. This volume is distributed by ORDER DEPARTMENT Lunar and Planetary Institute 3600 Bay Area Boulevard Houston TX 77058-1113, USA Phone:281-486-2172 Fax:281-486-2186 E-mail:[email protected] Mail order requestors will be invoiced for the cost of shipping and handling. Cover Art.“One Minute After the End of the Cretaceous.” This artist’s view shows the ancestral Gulf of Mexico near the present Yucatán peninsula as it was 65 m.y.
    [Show full text]
  • Mars Lifer’ ALH84001, the Diogenite NWA 5484
    Meteorite Times Magazine Contents Paul Harris Featured Articles Accretion Desk by Martin Horejsi Jim’s Fragments by Jim Tobin Bob’s Findings by Robert Verish Micro Visions by John Kashuba Norm’s Tektite Teasers by Norm Lehrman Meteorites in the News by Anne Black IMCA Insights by The IMCA Team Meteorite of the Month by Editor Tektite of the Month by Editor Terms Of Use Materials contained in and linked to from this website do not necessarily reflect the views or opinions of The Meteorite Exchange, Inc., nor those of any person connected therewith. In no event shall The Meteorite Exchange, Inc. be responsible for, nor liable for, exposure to any such material in any form by any person or persons, whether written, graphic, audio or otherwise, presented on this or by any other website, web page or other cyber location linked to from this website. The Meteorite Exchange, Inc. does not endorse, edit nor hold any copyright interest in any material found on any website, web page or other cyber location linked to from this website. The Meteorite Exchange, Inc. shall not be held liable for any misinformation by any author, dealer and or seller. In no event will The Meteorite Exchange, Inc. be liable for any damages, including any loss of profits, lost savings, or any other commercial damage, including but not limited to special, consequential, or other damages arising out of this service. © Copyright 2002–2020 The Meteorite Exchange, Inc. All rights reserved. No reproduction of copyrighted material is allowed by any means without prior written permission of the copyright owner.
    [Show full text]
  • Paléomagnétisme De La Matière Extraterrestre: Implications Pour La
    0 1 « Absorbé par les recherches sur l’infiniment grand, puis l’infiniment petit, le scientifique a négligé, de façon coupable, le fantastique potentiel de l’infiniment moyen. » Grégoire Lacroix 2 3 « Alors, tu en es où de tes études ? » « Et bien, j’ai rendu mon manuscrit de thèse au mois d’octobre et je soutiens le 4 décembre 2013 »…. Déjà. Ces trois année s de thèse sont passées à toute allure, entre expériences, rencontres, voyages, rigolades… (moment de nosta lgie… :-/ mais positive hein !! L’heure est donc aux remerciements ;-)). En premier lieu, je tiens à remercier mes directeurs de thèse, Mr Pierre Rochette et tout particulièrement Mr Jérôme Gattacceca, sans qui toute cette « histoire » n’aurait pas pu être écrite, pour la confiance qu’ils m’ont accordée en me confiant ce trav ail de recherche ainsi que pour leur aide, leurs encouragements et leurs précieux conseils au cours de ces années. Je les remercie aussi pour toutes les opportunités qu’ils m’ont offert es à travers de multiples voyages. Je remercie également Mr Nicolas Thouveny, directeur du laboratoire du CEREGE pour m’avoir accueillie au sein de cette institution et pour les conseils et les encouragements que j’ai eu l’honneur de recevoir de sa part. J’ai pu travailler dans un cadre particulièrement agréable, grâce à l’ensemble des membres de l’équipe « géophysique/planétologie » du CEREGE que j’ai intégrée pour ces 3 ans de thèse (et encore pour un an ;)), je vous en remercie. Ces trois années n’auraient pas été ce qu’elles ont été sans Mr François Demory, ingénieur de recherche, « mon mentor »… fidèle collègue et ami à qui j’aimerais adresser un remerciement particulier pour tout (il y en a tellement à dire mais bon, disons…) ses conseils, sa disponib ilité, son soutien indéfectible et ses tranches de rigolades J autour d’un café.
    [Show full text]
  • January Just As This Issue Was Coming out but It Is Lasting Well on the Mountains Just a Mile Away
    Meteorite Times Magazine Contents Paul Harris Featured Articles Accretion Desk by Martin Horejsi Jim’s Fragments by Jim Tobin Bob’s Findings by Robert Verish Micro Visions by John Kashuba Norm’s Tektite Teasers by Norm Lehrman IMCA Insights by The IMCA Team Meteorite of the Month by Editor Tektite of the Month by Editor Terms Of Use Materials contained in and linked to from this website do not necessarily reflect the views or opinions of The Meteorite Exchange, Inc., nor those of any person connected therewith. In no event shall The Meteorite Exchange, Inc. be responsible for, nor liable for, exposure to any such material in any form by any person or persons, whether written, graphic, audio or otherwise, presented on this or by any other website, web page or other cyber location linked to from this website. The Meteorite Exchange, Inc. does not endorse, edit nor hold any copyright interest in any material found on any website, web page or other cyber location linked to from this website. The Meteorite Exchange, Inc. shall not be held liable for any misinformation by any author, dealer and or seller. In no event will The Meteorite Exchange, Inc. be liable for any damages, including any loss of profits, lost savings, or any other commercial damage, including but not limited to special, consequential, or other damages arising out of this service. © Copyright 2002–2019 The Meteorite Exchange, Inc. All rights reserved. No reproduction of copyrighted material is allowed by any means without prior written permission of the copyright owner. Meteorite Times Magazine The Yellowstone Park Meteorite? Martin Horejsi Yellowstone National Park is an amazing place.
    [Show full text]
  • PDF Linkchapter
    Index [Italic page numbers indicate major references] A arsenic, 116, 143, 168 brecciation, shock, 225, 231 Ashanti crater, Ghana. See Bosumtwi Brent crater, Ontario, 321 Abitibi Subprovince, 305 crater, Ghana bromine, 137 Acraman depression, South Australia, A thy ris Broodkop Shear Zone, 180 211, 212, 218 gurdoni transversalis, 114 Budevska crater, Venus, 24 geochemistry, 216 hunanensis, 114 Bunyeroo Formation, 209, 210, 219, geochronology, 219 aubrite, 145 220, 221, 222 melt rock, 216, 218 augite, 159 Bushveld layered intrusion, 337 paleomagnetism, 219 Australasian strewn field, 114, 133, See also Acraman impact structure 134, 137, 138, 139, 140, 143, Acraman impact structure, South C 144, 146 Australia, 209 australite, 136, 141, 145, 146 Cabin-Medicine Lodge thrust system, Adelaid Geosyncline, 210, 220, 222 Austria, moldavites, 142 227 adularía, 167 Cabin thrust plate, 173, 225, 226, Aeneas on Dione crater, Earth, 24 227, 231, 232 aerodynamically shaped tektites, 135 B calcite, 112, 166 Al Umchaimin depression, western Barbados, tektites, 134, 139, 142, 144 calcium, 115, 116, 128 Iraq, 259 barium, 116, 169, 216 calcium oxide, 186, 203, 216 albite, 209 Barrymore crater, Venus, 44 Callisto, rings, 30 Algoman granites, 293 Basal Member, Onaping Formation, Cambodia, circular structure, 140, 141 alkali, 156, 159, 167 266, 267, 268, 271, 272, 273, Cambrian, Beaverhead impact alkali feldspar, 121, 123, 127, 211 289, 290, 295, 296, 299, 304, structure, Montana, 163, 225, 232 almandine-spessartite, 200 307, 308, 310, 311, 314 Canadian Arctic,
    [Show full text]