Shock Papers 2008

Total Page:16

File Type:pdf, Size:1020Kb

Shock Papers 2008 Shock Physics Papers 2008 2008, Acarer, M. and Demir, B. "An investigation of mechanical and metallurgical properties of explosive welded aluminum-dual phase steel" Mater. Letts 62 4158-4160 2008, Akbari-Mousavi, S.A.A., Barrett, L.M. and Al-Hassani, S.T.S. "Explosive welding of metal plates" J. Mater. Process. Technol. 202 224-239 2008, Akli, K.U., Hansen, S.B., Kemp, A.J., Freeman, R.R., Beg, F.N., Clark, D.C., Chen, S.D., Hey, D., Hatchett, S.P., Highbarger, K., Giraldez, E., Green, J.S., Gregori, G., Lancaster, K.L., Ma, T., MacKinnon, A.J., Norreys, P., Patel, N., Pasley, J., Shearer, C., Stephens, R.B., Stoeckl, C., Storm, M., Theobald, W., Van Woerkom, L.D., Weber, R. and Key, M.H. "Laser heating of solid matter by light-pressure- driven shocks at ultrarelativistic intensities" Phys. Rev. Letts 100 165002 2008, Alba-Baena, N.G., Salas, W. and Murr, L.E. "Characterization of micro and nano two-phase regimes created by explosive shock-wave consolidation of powder mixtures" Mater. Charact. 59 1152-1160 2008, Alexander, C.S., Chhabildas, L.C., Reinhart, W.D. and Templeton, D.W. "Changes to the shock response of fused quartz due to glass modification" Int. J. Impact Engng 35 1376-1385 2008, Álvarez, U.M., Ramírez, A., Fernández, F., Méndez, A. and Loske, A.M. "The influence of single pulse and tandem shock waves on bacteria" Shock Waves 17 441-447 2008, Amer, E., Gren, P. and Sjödahl, M. "Shock wave generation in laser ablation studied using pulsed digital holographic interferometry" J. Phys. D: Appl. Phys. 41 215502 2008, Amor, K., Hesselbo, S.P., Porcelli, D., Thackrey, S. and Parnell, J. "A Precambrian proximal ejecta blanket from Scotland" Geology 36 303-306 2008, An, Q., Luo, S.-N., Han, L.-B., Zheng, L. and Tschauner, O. "Melting of copper under hydrostatic and shock wave loading to high pressures" J. Phys.: Condens. Matter 20 095220 2008, Andrushevich, A.A. and Krivosheev, Y.K. "Dynamic reinforced of casting alloys after superdeep penetration" Adv. Mater. Res. 47 841-844 2008, Anisichkin, V.F. "Calculation of the velocity of sound behind the shock wave front in condensed media" Combust. Explos. Shock Waves 44 115-118 2008, Anisimov, S.I., Inogamov, N.A., Petrov, Y.V., Khokhlov, V.A., Zhakhovskii, V.V., Nishihara, K., Agranat, M.B., Ashitkov, S.I. and Komarov, P.S. "Interaction of short laser pulses with metals at moderate intensities" Appl. Phys. A 92 939- 943 2008, Ao, T., Asay, J.R., Chantrenne, S., Baer, M.R. and Hall, C.A. "A compact strip- line pulsed power generator for isentropic compression experiments" Rev. Sci. Instrum. 79 013903 1 2008, Apolenis, A.V., Tsvigunov, A.N., Annikov, V.E. and Raikova, V.M. "Synthesis of iron aluminates and new modification of alumina at impact of explosive", in "Proc. 11th Seminar of the New Trends in Research of Energetic Materials", ed. J. Ottis and J. Pachmán, pp. 448-453, publ. Pardubice, Czech Republic, University of Pardubice 2008, Apolenis, A.V., Tsvigunov, A.N., Annikov, V.A. and Raikova, V.M. "Synthesis of iron aluminates and a new modification of alumina at impact of explosive" Cent. Eur. J. Energ. Mater. 5(3) 37-44 2008, Apperson, S., Shende, R.V., Subramanian, S., Tappmeyer, D., Gangopadhyay, S., Chen, Z., Gangopadhyay, K., Redner, P., Nicolich, S. and Kapoor, D. "Erratum: Generation of fast propagating combustion and shock waves with copper oxide/alumunum nanothermite composites" Appl. Phys. Letts 92 229903 2008, Arinin, V.A., Mikhailova, O.L., Mochalov, M.A. and Urlin, V.D. "Quasi-isentropic compression of liquid argon at pressure = 1000 GPa" JETP Letts 87 209-212 2008, Armstrong, M.R., Crowhurst, J.C., Reed, E.J. and Zaug, J.M. "Ultrafast high strain rate acoustic wave measurements at high static pressure in a diamond anvil cell" Appl. Phys. Letts 92 101930 2008, Arrigoni, M., Boustie, M., Bolis, C., Berthe, L., Barradas, S. and Jeandin, M. "The use of a macroscopic formulation dfescribing the effects of dynamic compaction and porosity on plasma sprayed copper" J. Appl. Phys. 103 083509 2008, Asay, J.R., Ao, T., Davis, J.-P., Hall, C., Vogler, T.J. and Gray III, G.T. "Effect of initial properties on the flow strength of aluminum during quasi-isentropic compression" J. Appl. Phys. 103 083514 2008, Atchison, W.L., Zocher, M.A. and Kaul, A.M. "Studies of material constitutive behavior using perturbation growth in explosive and magnetically driven liner systems" Russ. J. Phys. Chem. B 2 387-401 2008, Atherton, L.J. "Targets for the National Ignition campaign" J. Phys. Conf. Ser. 112 032063 2008, Badziak, J., Kasperczuk, A., Parys, P., Pisarczyk, T., Rosinski, M., Ryc, L., Wolowski, J., Suchanska, R., Krása, J., Krousky, E., Láska, L., Masek, K., Pfeifer, M., Rohlena, K., Skala, J., Ullschmied, J., Dhareshwar, L.J., Földes, I.B., Suta, T., Borrielli, A., Mezzasalma, A., Torrisi, L. and Pisarczyk, P. "The effect of high-Z dopant on laser driven acceleration of a thin plastic target" Appl. Phys. Letts 92 211502 2008, Bae, Y.K. "Metastable innershell molecular state" Phys. Letts A 372 4865- 4869 2008, Bailey, J.E., Knudson, M.D., Carlson, A.L., Dunham, G.S., Desjarlais, M.P., Hanson, D.L. and Asay, J.R. "Time-resolved optical spectroscopy measurements of shocked liquid deuterium" Phys. Rev. B 78 144107 2 2008, Balagansky, I.A., Matrosov, A.D., Stadnichenko, I.A., Glumov, A.I. and Samsonov, A.V. "Influence of inert copper and silicon carbide inserts on process of detonation transmission through water" Mater. Sci. Forum 566 207-212 2008, Barber, J.L. and Kadau, K. "Shock front broadening in polycrystalline materials" Phys. Rev. B 77 144106 2008, Bates, J.W. "Response to comment on 'Instability of isolated planar shock waves'" Phys. Fluids 20 029102 2008, Baudoin, M., Thomas, J.-L., Coulouvrat, F. and Chaneac, C. "Acoustic shock wave propagation through solutions of nano-particles", in "Proc. 16th Int. Symp. on Nonlinear Acoustics", pp. 241-244, publ. New York, American Instutute of Physics 2008, Bavay, M., Spielman, R.B. and Avrillaud, G. "Veloce: A compact pulser for magnetically driven isentropic compression experiments" IEEE Trans. Plasma Sci. 36 2658-2661 2008, Beck, S.Y., Lee, J.W., Cho, M.W., Park, D.S., Jang, H.S. and Cho, W.S. "Micro pattern making method on AIN-hBN composites using powder blasting process" Key Engng Mater. 368 943-948 2008, Belous, A.I., Ovchinnikov, V.I., Bulko, L.D., Petitskaya, T.V. and Doroshkevich, E.A. "Determination of damages in superdeep penetration and alteration of properties of materials under extreme conditions" Adv. Mater. Res. 47 1274- 1277 2008, Benocci, R., Batani, D., Dezulian, R., Redaelli, R., Lucchini, G., Canova, F., Stabile, H., Faure, J., Krousky, E., Masek, K., Pfeifer, M., Skala, J., Dudzak, R., Koenig, M., Tikonchuk, V., Nicolai, P. and Malka, V. "Gas-induced smoothing of laser beams studied by interaction with thin foils" Plasma Phys. Controlled Fusion 50 115007 2008, Benuzzi-Mounaix, A., Loupias, B., Koenig, M., Ravasio, A., Ozaki, N., le Gloahec, M.R., Vinci, T., Aglitsky, Y., Faenov, A., Pikuz, T. and Boehly, T. "Density measurement of low-Z shocked material from monochromatic X-ray two- dimensional images" Phys. Rev. E 77 045402 2008, Bezruchko, G.S., Kanel, G.I., Razorenov, S.V., Savinykh, A.S. and Milyavskii, V.V. "Orientation effect on the parameters of the polymorphic transformation of graphite under shock compression" JETP Letts 88 220-223 2008, Bhattacharjee, Y. "Neuroscience - Shell shock revisited: Solving the puzzle of blast trauma" Science 319 406-408 2008, Billet, G., Giovangigli, V. and de Gassowski, G. "Impact of volume viscosity on a shock-hydrogen-bubble interaction" Combust. Theory Model. 12 221-248 2008, Bolme, C.A., McGrane, S.D., Moore, D.S., Whitley, V.H. and Funk, D.J. "Single shot Hugoniot of cyclohexane using a spatially resolved laser driven shock wave" Appl. Phys. Letts 93 191903 3 2008, Bolme, C.A. and Funk, D.J. "Ultrafast dynamic ellipsometry measurements of early time laser ablation of titanium thin films" Appl. Phys. A 92 761-766 2008, Boltachev, G.S., Volkov, N.B., Ivanov, V.V. and Paranin, S.N. "Dynamic compaction model for a granular medium" J. Appl. Mech. Tech. Phys. 49 336- 339 2008, Boltachev, G.S. and Volkov, N.B. "Analysis of the dynamic radial compaction of granular media" J. Appl. Mech. Tech. Phys. 49 1040-1046 2008, Bondar, M.P. "Grain size effect on the properties of materials under dynamic deformation" Combust. Explos. Shock Waves 44 365-369 2008, Borchers, A., Schmidt, T., Gartner, F. and Kreye, H. "High strain rate deformation microstructures of stainless steel 316L by cold spraying and explosive powder compaction" Appl. Phys. A 90 517-526 2008, Borg, J.P. and Vogler, T.J. "Mesoscale calculations of the dynamic behavior of a granular ceramic" Int. J. Solids Structures 45 1676-1696 2008, Borodziuk, S., Kasperczuk, A., Pisarczyk, T., Ullschmied, J., Krousky, E., Masek, K., Pfeifer, M., Rohlena, K., Skala, J. and Pisarczyk, P. "Reverse scheme of thin foil acceleration" Appl. Phys. Letts 93 101502 2008, Botta, O. "Extraterrestrial organic chemistry as recorded in carbonaceous chondrites" ACS Symp. Ser. 981 246-260 2008, Boudet, J.F., Amarouchene, Y. and Kellay, H. "Shock front width and structure in supersonic granular flows" Phys. Rev. Letts 101 254503 2008, Bouma, R.H.B., Boluijt, A.G., Verbeck, H.J. and van der Heijden, A.E.D.M. "On the impact testing of RDX crystals with different internal qualities" J. Appl. Phys. 103 093517 2008, Bourne, N.K., Bennett, K., Milne, A.M., MacDonald, S.A., Harrigan, J.J.
Recommended publications
  • Asteroid Impact, Not Volcanism, Caused the End-Cretaceous Dinosaur Extinction
    Asteroid impact, not volcanism, caused the end-Cretaceous dinosaur extinction Alfio Alessandro Chiarenzaa,b,1,2, Alexander Farnsworthc,1, Philip D. Mannionb, Daniel J. Luntc, Paul J. Valdesc, Joanna V. Morgana, and Peter A. Allisona aDepartment of Earth Science and Engineering, Imperial College London, South Kensington, SW7 2AZ London, United Kingdom; bDepartment of Earth Sciences, University College London, WC1E 6BT London, United Kingdom; and cSchool of Geographical Sciences, University of Bristol, BS8 1TH Bristol, United Kingdom Edited by Nils Chr. Stenseth, University of Oslo, Oslo, Norway, and approved May 21, 2020 (received for review April 1, 2020) The Cretaceous/Paleogene mass extinction, 66 Ma, included the (17). However, the timing and size of each eruptive event are demise of non-avian dinosaurs. Intense debate has focused on the highly contentious in relation to the mass extinction event (8–10). relative roles of Deccan volcanism and the Chicxulub asteroid im- An asteroid, ∼10 km in diameter, impacted at Chicxulub, in pact as kill mechanisms for this event. Here, we combine fossil- the present-day Gulf of Mexico, 66 Ma (4, 18, 19), leaving a crater occurrence data with paleoclimate and habitat suitability models ∼180 to 200 km in diameter (Fig. 1A). This impactor struck car- to evaluate dinosaur habitability in the wake of various asteroid bonate and sulfate-rich sediments, leading to the ejection and impact and Deccan volcanism scenarios. Asteroid impact models global dispersal of large quantities of dust, ash, sulfur, and other generate a prolonged cold winter that suppresses potential global aerosols into the atmosphere (4, 18–20). These atmospheric dinosaur habitats.
    [Show full text]
  • A Study of the Brushy Creek Feature, Saint Helena Parish, Louisiana Andrew Schedl
    Open-File Series No. 18-01 Fall 2018 A Study of the Brushy Creek Feature, Saint Helena Parish, Louisiana Andrew Schedl Abstract This study was unable to determine the origin of the Brushy Creek feature. New¯ thin sections were made and new and old thin sections were examined using the opti- cal and scanning electron microscope (SEM). Powdered samples from the center of Brushy Creek were examined using X-ray diffraction (XRD). In sample 16SHPA, a half dozen new grains with probable planar deformation features (PDF) were found with orientations of {1012} and {1011}. Preliminary SEM studies of zircons showed no evidence for PDFs or reidite. Only one grain from the center of Brushy Creek structure showed possible rectangular fracture. XRD analysis found no evidence for high-pressure forms of quartz, coesite and stishovite. Suggestions for further study are included. Introduction North-south oriented ridges and ravines dominate the landscape in this part of Louisiana. The Brushy Creek is a “noticeable circular hole” in the ridge/ravine topography (Heinrich, 2003). The feature is about 2 kilometers in diameter and has a relief of 15 meters and Brushy Creek breeches the southeast rim of this feature. Exposed in the rim is the poorly lithified and highly fractured Pliocene Citronelle Formation. Near the Brushy Creek feature, the Citronelle formation consists of cross-bedded, massive, poorly sorted fine to coarse sand 9-12 meters thick underlain by 6 meters of laminated clay and silt. The Kentwood Brick and Tile Company has drilled the center of the feature and have found that the laminated clay and silt is absent.
    [Show full text]
  • Impact Cratering
    6 Impact cratering The dominant surface features of the Moon are approximately circular depressions, which may be designated by the general term craters … Solution of the origin of the lunar craters is fundamental to the unravel- ing of the history of the Moon and may shed much light on the history of the terrestrial planets as well. E. M. Shoemaker (1962) Impact craters are the dominant landform on the surface of the Moon, Mercury, and many satellites of the giant planets in the outer Solar System. The southern hemisphere of Mars is heavily affected by impact cratering. From a planetary perspective, the rarity or absence of impact craters on a planet’s surface is the exceptional state, one that needs further explanation, such as on the Earth, Io, or Europa. The process of impact cratering has touched every aspect of planetary evolution, from planetary accretion out of dust or planetesimals, to the course of biological evolution. The importance of impact cratering has been recognized only recently. E. M. Shoemaker (1928–1997), a geologist, was one of the irst to recognize the importance of this process and a major contributor to its elucidation. A few older geologists still resist the notion that important changes in the Earth’s structure and history are the consequences of extraterres- trial impact events. The decades of lunar and planetary exploration since 1970 have, how- ever, brought a new perspective into view, one in which it is clear that high-velocity impacts have, at one time or another, affected nearly every atom that is part of our planetary system.
    [Show full text]
  • Multiple Fluvial Reworking of Impact Ejecta—A Case Study from the Ries Crater, Southern Germany
    Multiple fluvial reworking of impact ejecta--A case study from the Ries crater, southern Germany Item Type Article; text Authors Buchner, E.; Schmieder, M. Citation Buchner, E., & Schmieder, M. (2009). Multiple fluvial reworking of impact ejecta—A case study from the Ries crater, southern Germany. Meteoritics & Planetary Science, 44(7), 1051-1060. DOI 10.1111/j.1945-5100.2009.tb00787.x Publisher The Meteoritical Society Journal Meteoritics & Planetary Science Rights Copyright © The Meteoritical Society Download date 06/10/2021 20:56:07 Item License http://rightsstatements.org/vocab/InC/1.0/ Version Final published version Link to Item http://hdl.handle.net/10150/656594 Meteoritics & Planetary Science 44, Nr 7, 1051–1060 (2009) Abstract available online at http://meteoritics.org Multiple fluvial reworking of impact ejecta—A case study from the Ries crater, southern Germany Elmar BUCHNER* and Martin SCHMIEDER Institut für Planetologie, Universität Stuttgart, 70174 Stuttgart, Germany *Corresponding author. E-mail: [email protected] (Received 21 July 2008; revision accepted 12 May 2009) Abstract–Impact ejecta eroded and transported by gravity flows, tsunamis, or glaciers have been reported from a number of impact structures on Earth. Impact ejecta reworked by fluvial processes, however, are sparsely mentioned in the literature. This suggests that shocked mineral grains and impact glasses are unstable when eroded and transported in a fluvial system. As a case study, we here present a report of impact ejecta affected by multiple fluvial reworking including rounded quartz grains with planar deformation features and diaplectic quartz and feldspar glass in pebbles of fluvial sandstones from the “Monheimer Höhensande” ~10 km east of the Ries crater in southern Germany.
    [Show full text]
  • Introduction
    Introduction Introduction Doing Science Science & Society Our Environmental Heritage The Science of Global Change Summary The materials of science are the material of life itself. Science is part of the reality of living; it is the what, the how, and the why of everything in our experience. It is impossible to understand man without understanding his environment and the forces that have molded him physically and mentally. The aim of science is to discover and illuminate truth. Rachel Carson Whatever knowledge is attainable, must be obtained by scientific methods, and what science cannot discover, mankind cannot know. Bertrand Russell Introduction • Earth science, geology and environmental geology involve the study of the Earth and the processes that shape its surface but have different emphases. • The Earth System is composed of four principal components: atmosphere, hydrosphere, biosphere, and the solid Earth. • The science of Earth becomes relevant to society when we examine the interaction between human beings and the planet we share. The Good Earth represents an attempt to introduce students to Earth Science with an emphasis on our interaction with our environment. Consequently, this text includes components from two common undergraduate courses, Earth Science and Environmental Geology. These courses have more elements in common than they have differences. • Geology is the study of the Earth. That includes how the planet was formed, what it is made from, and how it has changed over time. Geologists study the processes that occur on Earth's surface and others taking place within the planet's interior. • Environmental geology views geology through the prism of the human experience.
    [Show full text]
  • Impact Structures and Events – a Nordic Perspective
    107 by Henning Dypvik1, Jüri Plado2, Claus Heinberg3, Eckart Håkansson4, Lauri J. Pesonen5, Birger Schmitz6, and Selen Raiskila5 Impact structures and events – a Nordic perspective 1 Department of Geosciences, University of Oslo, P.O. Box 1047, Blindern, NO 0316 Oslo, Norway. E-mail: [email protected] 2 Department of Geology, University of Tartu, Vanemuise 46, 51014 Tartu, Estonia. 3 Department of Environmental, Social and Spatial Change, Roskilde University, P.O. Box 260, DK-4000 Roskilde, Denmark. 4 Department of Geography and Geology, University of Copenhagen, Øster Voldgade 10, DK-1350 Copenhagen, Denmark. 5 Division of Geophysics, University of Helsinki, P.O. Box 64, FIN-00014 Helsinki, Finland. 6 Department of Geology, University of Lund, Sölvegatan 12, SE-22362 Lund, Sweden. Impact cratering is one of the fundamental processes in are the main reason that the Nordic countries are generally well- the formation of the Earth and our planetary system, as mapped. reflected, for example in the surfaces of Mars and the Impact craters came into the focus about 20 years ago and the interest among the Nordic communities has increased during recent Moon. The Earth has been covered by a comparable years. The small Kaalijärv structure of Estonia was the first impact number of impact scars, but due to active geological structure to be confirmed in northern Europe (Table 1; Figures 1 and processes, weathering, sea floor spreading etc, the num- 7). First described in 1794 (Rauch), the meteorite origin of the crater ber of preserved and recognized impact craters on the field (presently 9 craters) was proposed much later in 1919 (Kalju- Earth are limited.
    [Show full text]
  • Ages of Large Lunar Impact Craters and Implications for Bombardment During the Moon’S Middle Age ⇑ Michelle R
    Icarus 225 (2013) 325–341 Contents lists available at SciVerse ScienceDirect Icarus journal homepage: www.elsevier.com/locate/icarus Ages of large lunar impact craters and implications for bombardment during the Moon’s middle age ⇑ Michelle R. Kirchoff , Clark R. Chapman, Simone Marchi, Kristen M. Curtis, Brian Enke, William F. Bottke Southwest Research Institute, 1050 Walnut Street, Suite 300, Boulder, CO 80302, United States article info abstract Article history: Standard lunar chronologies, based on combining lunar sample radiometric ages with impact crater den- Received 20 October 2012 sities of inferred associated units, have lately been questioned about the robustness of their interpreta- Revised 28 February 2013 tions of the temporal dependance of the lunar impact flux. In particular, there has been increasing focus Accepted 10 March 2013 on the ‘‘middle age’’ of lunar bombardment, from the end of the Late Heavy Bombardment (3.8 Ga) until Available online 1 April 2013 comparatively recent times (1 Ga). To gain a better understanding of impact flux in this time period, we determined and analyzed the cratering ages of selected terrains on the Moon. We required distinct ter- Keywords: rains with random locations and areas large enough to achieve good statistics for the small, superposed Moon, Surface crater size–frequency distributions to be compiled. Therefore, we selected 40 lunar craters with diameter Cratering Impact processes 90 km and determined the model ages of their floors by measuring the density of superposed craters using the Lunar Reconnaissance Orbiter Wide Angle Camera mosaic. Absolute model ages were computed using the Model Production Function of Marchi et al.
    [Show full text]
  • The Subsurface Structure of Oblique Impact Craters
    The subsurface structure of oblique impact craters Dissertation vorgelegt von Dipl.-Geol. Michael H. Poelchau vom Fachbereich Geowissenschaften der Freien Universität Berlin zur Erlangung des akademischen Grades doctor rerum naturalium (Dr. rer. nat.) Berlin, 2010 The subsurface structure of oblique impact craters Dissertation vorgelegt von Dipl.-Geol. Michael H. Poelchau vom Fachbereich Geowissenschaften der Freien Universität Berlin zur Erlangung des akademischen Grades doctor rerum naturalium (Dr. rer. nat.) Berlin, 2010 Gutachter: 1. PD Dr. Thomas Kenkmann 2. Prof. Wolf-Uwe Reimold Tag der Disputation: 23.02.2010 Statement regarding the contributions of the author and others to this thesis This thesis is comprised of three published, peer-reviewed articles and one submitted manuscript, which each form separate chapters within this thesis. The chapters “Introduction” and “General Conclusions” were written especially for this thesis. The PhD candidate is the first author of two of these articles, and the second author of the third article. The PhD candidate is also the first author of a manuscript currently submitted to Earth and Planetary Science Letters. Therefore, these four chapters have their own introduction, methodology, discussion, conclusions and references. The articles and manuscripts used in this thesis are the following: Poelchau, M. H., and T. Kenkmann, 2008. Asymmetric signatures in simple craters as an indicator for an oblique impact direction, Meteoritcal and Planetary Science, 43, 2059-2072. Poelchau M. H., Kenkmann T. and Kring D. A., 2009. Rim uplift and crater shape in Meteor Crater: the effects of target heterogeneities and trajectory obliquity. Journal of Geophysical Research, 114, E01006, doi:10.1029/2008JE003235. Kenkmann, T.
    [Show full text]
  • N92-10772 GLACIAL and MARINE CHRONOLOGY of MARS; Robert G
    N92-10772 GLACIAL AND MARINE CHRONOLOGY OF MARS; Robert G. Strom, Jeffrey S. Kargel, Natasha Johnson, and Christine Knight; Lunar and Planetary Laboratory, University of Arizona, Tucson AZ 85721 A hydrological model involving episodic oceans and ice sheets on Mars has been presented by r_^l ...... ! /1 "_ ¢'N_ Ale *1_ m-i;n .nralrt,_int_e ¢.r_nr,_r_ine¢ thle mc'u_l ic th_ _tor_ _nd enrrwl_tinn nf thw_,_ DC_l_.Vdt, GI t_;. _LI*X_]* %.Jtt_w t,J& UtV *&t_tt W**vva_**mv_ vv*a_w****m*_ _t_ *t*_w ....... O ..................... events. Even more uncertain are their absolute ages. However, based on stratigraphic and cratering evidence, the most recent occurrence of these events was relatively late in Martian history. The cratering record on Mars can be divided into three general periods: 1) the period of late heavy bombardment, 2) a transition period at the end of late heavy bombardment, and 3) the post heavy bombardment era (3). The crater size/frequency distribution represented by the period of late heavy bombardment is characterized by a complex curve with a differential -2 slope (cumulative -1) at diameters less than about 50 km diameter, while the post heavy bombardment size distribution has a differential -3 slope (cumulative -2) over the same diameter range (Fig. 1). On the Martian time-stratigraphic scale, the period of late heavy bombardment occurred during Noachian and Early Hesperian time and came to an end during the Middle Hesperian. The post heavy bombardment era began in Late Hesperian time and extends through the Amazonian Epoch to the present day (3).
    [Show full text]
  • Sedimentary Record of Impact Events in Spain
    Geological Society of America Special Paper 356 2002 Sedimentary record of impact events in Spain Enrique Dı´az-Martı´nez* Enrique Sanz-Rubio Jesu´s Martı´nez-Frı´as Centro de Astrobiologı´a Consejo Superior de Investigaciones Cientı´ficas—Instituto Nacional de Te´cnica Aeroespacial, Carretera, Torrejo´n-Ajalvir kilo´metro 4, 28850 Torrejo´n de Ardoz, Madrid, Spain ABSTRACT A review of the evidence of meteorite-impact events in the sedimentary record of Spain reveals that the only proven impact-related bed is the clay layer at the Cretaceous-Tertiary boundary (at Zumaya and Sopelana in the Bay of Biscay region, and at Caravaca, Agost, and Alamedilla in the Betic Cordilleras). Other deposits previously proposed as impact related can now be rejected, or are dubious and still debated. These include the Pelarda Formation, alleged to represent proximal ejecta from the Azuara structure; the Paleocene-Eocene boundary near Zumaya (western Pyrenees) and Alamedilla (Betic Cordillera); and the Arroyofrı´o Oolite Bed, which has been alleged as distal ejecta of an unknown Callovian-Oxfordian impact event. The scarcity of evidence for meteorite-impact events in the sedimentary record is possibly due to a lack of detailed studies. We propose several sedimentary units that could potentially be related to impact events, and where future research should focus. INTRODUCTION DISTAL RECORD OF IMPACT EVENTS The sedimentary record of Spain presents evidence for at The evidence from sedimentary units to be considered as least one impact event, as well as a number of units of potential distal impact ejecta may consist of geochemical anomalies of impact clastic origin (some of which are currently under inves- elements and isotopes (e.g., Ir, 187Os/188Os), the presence of tigation).
    [Show full text]
  • Target Rocks, Impact Glasses, and Melt Rocks from the Lonar Impact Crater, India: Petrography and Geochemistry
    Meteoritics & Planetary Science 40, Nr 9/10, 1473–1492 (2005) Abstract available online at http://meteoritics.org Target rocks, impact glasses, and melt rocks from the Lonar impact crater, India: Petrography and geochemistry Shiloh OSAE1, 2, Saumitra MISRA3, Christian KOEBERL1*, Debashish SENGUPTA3, and Sambhunath GHOSH4 1Department of Geological Sciences, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria 2National Nuclear Research Institute, Ghana Atomic Energy Commission, P.O. Box LG 80, Legon-Accra, Ghana 3Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur 721 302, India 4Geological Survey of India, 27 Jawaharlal Nehru Road, Kolkata 700016, India *Corresponding author. E-mail: [email protected] (Received 01 February 2005; revision accepted 16 July 2005) Abstract–The Lonar crater, India, is the only well-preserved simple crater on Earth in continental flood basalts; it is excavated in the Deccan trap basalts of Cretaceous-Tertiary age. A representative set of target basalts, including the basalt flows excavated by the crater, and a variety of impact breccias and impact glasses, were analyzed for their major and trace element compositions. Impact glasses and breccias were found inside and outside the crater rim in a variety of morphological forms and shapes. Comparable geochemical patterns of immobile elements (e.g., REEs) for glass, melt rock and basalt indicates minimal fractionation between the target rocks and the impactites. We found only little indication of post-impact hydrothermal alteration in terms of volatile trace element changes. No clear indication of an extraterrestrial component was found in any of our breccias and impact glasses, indicating either a low level of contamination, or a non-chondritic or otherwise iridium-poor impactor.
    [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]