DOCSLIB.ORG

Atlantic Geoscience Society

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Atlantic Geoscience Society Atlantic Geology 69 Atlantic Geoscience Society ABSTRACTS 2006 Colloquium & Annual General Meeting GREENWICH, NOVA SCOTIA The 32nd Colloquium and Annual General Meeting was held at the Old Orchard Inn, Greenwich, Nova Scotia on February 2 and 4, 2006. On behalf of the society we thank the organizing committee, Liz Kosters, Rob Raeside and Ian Spooner, as well as their supporting staff. We also acknowledge sponsorship from the following companies and organizations: Acadia Gold Corporation, Corridor Resources, Falconbridge, Potash Company of Saskatchewan and the Nova Scotia Department of Natural Resources, Mines and Energy Branch. In the following pages we are pleased to publish the abstracts of oral presentations and posters from the Colloquium. THE EDITORS Atlantic Geology 42, 69–125 (2006) 0843-5561|06|010069–57$9.55|o 70 AGS Abstracts – 2006 Annual General Meeting Integrating analogue experiments and seismic 3D structures similar to those observed along the Scotian interpretation for improved understanding of Margin, including crestal grabens, landward-and seaward- sedimentation and salt dynamics in Mesozoic sub-basins dipping roller structures, triangular-shaped reactive and and their deepwater extensions, offshore Nova Scotia active diapirs, turtle structures, canopies, and allochthonous salt detachments. The tectonic evolution is strongly controled Juergen Adam1, John Shimeld2, Csaba Krezsek1, by sedimentation. Individual sub-basins and their deep-water Steve King1, Sheila Ballantyne1, and compressional belts are coupled spatially and temporally and Djordje Grujic1 are characterized by lateral and temporal migration and highly 1. Salt Dynamics Group, Department of Earth Sciences variable and localized subsidence patterns. Our results show Dalhousie University, Life Sciences Centre, Halifax, NS, B3H 4J1 that a strong relation exists between sedimentation, rate of <[email protected]> ¶ 2. Geological Survey of Canada (Atlantic), extension and dominant structural styles. Bedford Institute of Oceanography, P.O. Box 1006, Integration of 4D physical simulations with 2D/3D struc- Dartmouth, NS, B2Y 4A2 <[email protected]> tural modelling and seismic interpretation will lead to a new generation of improved interpretation templates for salt-re- Salt-deformation features beneath the shelf and slope of lated structures and basins of offshore Atlantic Canada. The the Scotian Margin manifest complex tectono-stratigraphic project will signifi cantly improve our understanding of the relationships with high rates of sedimentation and prograda- interaction of dynamic salt systems with sedimentation and tion during the Jurassic and Early Cretaceous. Exploration erosion processes and will aid interpretation of complex struc- and seismic interpretation concepts developed in other salt tures beneath the Scotian Margin. basins (e.g., Gulf of Mexico and South Atlantic basins) are not directly transferable to the Scotian Margin due to differences in palaeographic setting, sediment supply, and primary salt- An ornithischian dinosaur from the Sustut Basin, basin geometry. northern British Columbia, Canada We have begun an integrated geoscience study with innova- tive 4D physical simulations using scaled analogue models and Victoria Megan Arbour and Milton Graves 2D/3D seismic interpretation. Our objective is to investigate Dalhousie University, Halifax, NS, B3H 4R2 the complex interplay between sedimentation and salt defor- <[email protected]> <[email protected]> mation in different sub-basins and their deepwater extensions that are characterized by contrasting salt deformation styles In 1971, dinosaur bones were discovered during uranium ranging from major extension and roho-style detachment to exploration in the Sustut Basin in northern British Columbia, minor extension and vertical salt movement. Canada, and were donated to Dalhousie University in Nova Public domain seismic data provide the boundary condi- Scotia in 2004. Although dinosaur bones have been reported tions for the experiments including tectonic setting, geometry from British Columbia previously, this specimen is the earliest of salt basins, and sedimentation pattern and rates. The evolu- recorded discovery of dinosaur bones from the province. The tion of the sedimentary basins and the dynamic salt system specimen also represents one of the westernmost discoveries is simulated in physical experiments that consist of scaled of dinosaur bones in Canada. The bones were collected from granular-viscous models with syntectonic sedimentation. loose blocks in a talus slope, near the intersection of Birdfl at Model deformation is analysed by time-series of images and Creek and Sustut River. 3D displacement data obtained with high-resolution optical The fossils are encased in a hard siltstone that shares char- image correlation techniques (2D/3D PIV – Particle Imaging acteristics with both the Early Albian to Late Cenomanian Velocimetry). Tango Creek Formation and the Late Campanian to late Early Structural 3D models are built from model sections with Maastrichtian Brothers Peak Formation, making a more pre- commercial seismic interpretation software to provide insights cise age estimate for this specimen diffi cult. Bones collected in the architecture of the linked salt-controled basins and fault include the right humerus, a radius, the distal portion of the structures. The integration of structural interpretation with right tibia and fi bula, several pedal phalanges including two time-series of fault strain data allows the reliable 3D fault cor- unguals, and several unidentifi able fragments. A small block of relation and the mechanical analysis of complex fault systems. matrix removed from the tibia contains additional small bones, For the fi rst time, this new modelling approach allows us to but further preparation is not possible at this time. quantitatively assess: 1) the timing and mechanisms of faulting, Comparison of the material with specimens at the Royal folding and salt migration, 2) the role of variable sedimentation Ontario Museum and descriptions in the scientifi c litera- patterns and rates, and 3) the coupling between extensional, ture indicates that a relatively small (less than fi ve metres in translational and compressional regimes. length), bipedal ornithischian is represented. General features In this experiment series we have investigated the role of of the tibia and phalanges are consistent with the ornithopod basin fl oor dip, sedimentation pattern and rates on the basin Thescelosaurus, but a low deltopectoral crest on the humerus evolution at regional scale. The experiment results show that matches closely with Stegoceras and other pachycephalo- gravitational collapse and salt mobilization generate complex saurs. Atlantic Geology 71 Distinguishing primary versus hydrothermal The high economic risk in hydrocarbon exploration on alteration assemblages at the Chuquicamata the Scotian Slope, offshore Nova Scotia, is caused by the porphyry copper system, Chile complex salt structures, which developed from the Triassic to Cretaceous periods. This study applies physical experiments Alexandra M. Arnott and Marcos Zentilli with optical strain monitoring to develop new concepts for the Dalhousie University, Halifax, NS, B3H 4J1, interpretation of geological and geophysical data, and provides <[email protected]>, <[email protected]> information for the hydrocarbon exploration in this area. The scaled analogue models, which use silica sand and silicone as One of the major problems facing a new geologist at a mine sediments and salt analogues, simulate gravity-driven syn-sedi- is learning how to distinguish in the workings and in drillcore mentary deformation in passive margin sedimentary wedges the various fresh, generally unmineralized rock units, their overlying a mobile substratum. High-resolution optical strain hydrothermally altered equivalents, and those altered by monitoring techniques (2D/3D Particle Imaging Velocimetry, weathering, which are often intermingled due to complex PIV) enable one to quantify the complete 3D deformation and structural deformation. It is also tricky to distinguish between surface fl ow in the experiments. magmatic biotite and K-feldspar from that formed by potassic A series of experiments have been conducted to study the alteration. Previous review of previous work is essential, and effects of varying sedimentation rates and the dip variation classical mineralogy and petrographic techniques, such as slab- of the experimental base on the spatiotemporal deformation bing and staining of feldspars can help, but often thin section pattern. Results show that complex relationships exist be- microscopy, x-ray diffraction and other modern mineralogical tween sedimentation pattern, basal dips, salt structures, and tools (e.g., electron microprobe) are necessary to unravel the fault formation in the overburden. Time-series strain data alteration record. At the Chuquicamata porphyry copper de- and structural interpretation of these experiments provides posit, Chile, mineralogical and geochemical evidence suggest insights in the dynamic evolution of sedimentary basins over a multiphase history of intrusion and alteration/mineralization a mobile substratum. Our results have the potential to improve complicated due to structural complexity. A strike-slip struc- the structural and seismic interpretation of the Scotian Slope ture, the West Fault, truncates the Chuquicamata Intrusive salt province. Complex (CIC), which consists of the calcalkaline granodioritic Este,
Load more

Recommended publications
  • Imaginative Geographies of Mars: the Science and Significance of the Red Planet, 1877 - 1910
    Copyright by Kristina Maria Doyle Lane 2006 The Dissertation Committee for Kristina Maria Doyle Lane Certifies that this is the approved version of the following dissertation: IMAGINATIVE GEOGRAPHIES OF MARS: THE SCIENCE AND SIGNIFICANCE OF THE RED PLANET, 1877 - 1910 Committee: Ian R. Manners, Supervisor Kelley A. Crews-Meyer Diana K. Davis Roger Hart Steven D. Hoelscher Imaginative Geographies of Mars: The Science and Significance of the Red Planet, 1877 - 1910 by Kristina Maria Doyle Lane, B.A.; M.S.C.R.P. Dissertation Presented to the Faculty of the Graduate School of The University of Texas at Austin in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy The University of Texas at Austin August 2006 Dedication This dissertation is dedicated to Magdalena Maria Kost, who probably never would have understood why it had to be written and certainly would not have wanted to read it, but who would have been very proud nonetheless. Acknowledgments This dissertation would have been impossible without the assistance of many extremely capable and accommodating professionals. For patiently guiding me in the early research phases and then responding to countless followup email messages, I would like to thank Antoinette Beiser and Marty Hecht of the Lowell Observatory Library and Archives at Flagstaff. For introducing me to the many treasures held deep underground in our nation’s capital, I would like to thank Pam VanEe and Ed Redmond of the Geography and Map Division of the Library of Congress in Washington, D.C. For welcoming me during two brief but productive visits to the most beautiful library I have seen, I thank Brenda Corbin and Gregory Shelton of the U.S.
    [Show full text]
  • Glossary Glossary
    Glossary Glossary Albedo A measure of an object’s reflectivity. A pure white reflecting surface has an albedo of 1.0 (100%). A pitch-black, nonreflecting surface has an albedo of 0.0. The Moon is a fairly dark object with a combined albedo of 0.07 (reflecting 7% of the sunlight that falls upon it). The albedo range of the lunar maria is between 0.05 and 0.08. The brighter highlands have an albedo range from 0.09 to 0.15. Anorthosite Rocks rich in the mineral feldspar, making up much of the Moon’s bright highland regions. Aperture The diameter of a telescope’s objective lens or primary mirror. Apogee The point in the Moon’s orbit where it is furthest from the Earth. At apogee, the Moon can reach a maximum distance of 406,700 km from the Earth. Apollo The manned lunar program of the United States. Between July 1969 and December 1972, six Apollo missions landed on the Moon, allowing a total of 12 astronauts to explore its surface. Asteroid A minor planet. A large solid body of rock in orbit around the Sun. Banded crater A crater that displays dusky linear tracts on its inner walls and/or floor. 250 Basalt A dark, fine-grained volcanic rock, low in silicon, with a low viscosity. Basaltic material fills many of the Moon’s major basins, especially on the near side. Glossary Basin A very large circular impact structure (usually comprising multiple concentric rings) that usually displays some degree of flooding with lava. The largest and most conspicuous lava- flooded basins on the Moon are found on the near side, and most are filled to their outer edges with mare basalts.
    [Show full text]
  • New Constraints on the Age, Geochemistry
    New constraints on the age, geochemistry, and environmental impact of High Arctic Large Igneous Province magmatism: Tracing the extension of the Alpha Ridge onto Ellesmere Island, Canada T.V. Naber1,2, S.E. Grasby1,2, J.P. Cuthbertson2, N. Rayner3, and C. Tegner4,† 1 Geological Survey of Canada–Calgary, Natural Resources Canada, Calgary, Canada 2 Department of Geoscience, University of Calgary, Calgary, Canada 3 Geological Survey of Canada–Northern, Natural Resources Canada, Ottawa, Canada 4 Centre of Earth System Petrology, Department of Geoscience, Aarhus University, Aarhus, Denmark ABSTRACT Island, Nunavut, Canada. In contrast, a new Province (HALIP), is one of the least studied U-Pb age for an alkaline syenite at Audhild of all LIPs due to its remote geographic lo- The High Arctic Large Igneous Province Bay is significantly younger at 79.5 ± 0.5 Ma, cation, and with many exposures underlying (HALIP) represents extensive Cretaceous and correlative to alkaline basalts and rhyo- perennial arctic sea ice. Nevertheless, HALIP magmatism throughout the circum-Arctic lites from other locations of northern Elles- eruptions have been commonly invoked as a borderlands and within the Arctic Ocean mere Island (Audhild Bay, Philips Inlet, and potential driver of major Cretaceous Ocean (e.g., the Alpha-Mendeleev Ridge). Recent Yelverton Bay West; 83–73 Ma). We propose anoxic events (OAEs). Refining the age, geo- aeromagnetic data shows anomalies that ex- these volcanic occurrences be referred to col- chemistry, and nature of these volcanic rocks tend from the Alpha Ridge onto the northern lectively as the Audhild Bay alkaline suite becomes critical then to elucidate how they coast of Ellesmere Island, Nunavut, Canada.
    [Show full text]
  • Gemeinsame Stellungnahme
    10.10.2018 Gemeinsame Stellungnahme Der agl-Konzeptvorschlag zur Rohstoffsicherung in der Vulkaneifel - Fakten, Kritik, Wertung - Zusammenfassung und Wertung Von der Vielzahl der Lagerstätten mit Lava und Basalt des Landkreises Vulkaneifel hat das Landesamt für Geologie (LGB) 46 Lagerstätten als Rohstoffpotenzialflächen in einer Karte dargestellt. Dabei wurde, anders als bisher, keine Nutzungsempfehlung (Vorrang- bzw. Vor- behaltsgebiet) ausgesprochen. Diese Vorgehensweise ist zu begrüßen, da sie zu einer freieren und sachgerechteren Entscheidung durch die Entscheidungsträger beiträgt. Von den 46 erfass- ten Potenzialflächen werden 13 überhaupt nicht für den Rohstoffabbau in Anspruch genom- men. An weiteren 14 wird der Abbau nur noch in dem bereits genehmigten Umfang fortge- führt. Dadurch bleibt eine Vielzahl unverzichtbarer Landschaftselemente erhalten, die durch die früheren Vorschläge für den neuen Raumordnungsplan (ROPneu) akut gefährdet waren. Zu begrüßen ist die Ausweisung eines Gebietes, in dem über den genehmigten Umfang hinaus ein weiterer Gesteinsabbau ausgeschlossen wird. In der vorgeschlagenen Abgrenzung ge- währleistet das Gebiet jedoch nicht den Erhalt des charakteristischen Aussehens der hiesigen Vulkanlandschaft. Es ist daher entsprechend dieser Zielsetzung zu arrondieren. Die 19 für einen Abbau bzw. künftigen Abbau vorgeschlagenen Flächen (Vorranggebiete für die Rohstoffgewinnung bzw. Vorranggebiete für die vorsorgende Rohstoffsicherung und Vorbehaltsgebiete) sind zumeist auf landschaftlich bereits stark vorgeschädigte
    [Show full text]
  • Martian Crater Morphology
    ANALYSIS OF THE DEPTH-DIAMETER RELATIONSHIP OF MARTIAN CRATERS A Capstone Experience Thesis Presented by Jared Howenstine Completion Date: May 2006 Approved By: Professor M. Darby Dyar, Astronomy Professor Christopher Condit, Geology Professor Judith Young, Astronomy Abstract Title: Analysis of the Depth-Diameter Relationship of Martian Craters Author: Jared Howenstine, Astronomy Approved By: Judith Young, Astronomy Approved By: M. Darby Dyar, Astronomy Approved By: Christopher Condit, Geology CE Type: Departmental Honors Project Using a gridded version of maritan topography with the computer program Gridview, this project studied the depth-diameter relationship of martian impact craters. The work encompasses 361 profiles of impacts with diameters larger than 15 kilometers and is a continuation of work that was started at the Lunar and Planetary Institute in Houston, Texas under the guidance of Dr. Walter S. Keifer. Using the most ‘pristine,’ or deepest craters in the data a depth-diameter relationship was determined: d = 0.610D 0.327 , where d is the depth of the crater and D is the diameter of the crater, both in kilometers. This relationship can then be used to estimate the theoretical depth of any impact radius, and therefore can be used to estimate the pristine shape of the crater. With a depth-diameter ratio for a particular crater, the measured depth can then be compared to this theoretical value and an estimate of the amount of material within the crater, or fill, can then be calculated. The data includes 140 named impact craters, 3 basins, and 218 other impacts. The named data encompasses all named impact structures of greater than 100 kilometers in diameter.
    [Show full text]
  • Hymenoptera: Aculeata) Der Eifel 1115-1154 Esser Und Cölln: Bedeutung Von Tuff- Und Lavagruben Für Stechimmen 1115
    ZOBODAT - www.zobodat.at Zoologisch-Botanische Datenbank/Zoological-Botanical Database Digitale Literatur/Digital Literature Zeitschrift/Journal: Fauna und Flora in Rheinland-Pfalz Jahr/Year: 2000-2002 Band/Volume: 9 Autor(en)/Author(s): Esser Jürgen, Cölln Klaus Artikel/Article: Bedeutung von Tuff- und Lavagruben für die Stechimmenfauna (Hymenoptera: Aculeata) der Eifel 1115-1154 Esser und Cölln: Bedeutung von Tuff- und Lavagruben für Stechimmen 1115 Fauna Flora Rheinland-Pfalz 9: Heft 4 (2002): S.l 115-1154. Landau Bedeutung von Tuff- und Lavagruben für die Stechimmenfauna (Hymenoptera: Aculeata) der Eifel* von Jürgen Esser und Klaus Cölln (mit Zeichnungen von Jochen Jacobi) Inhaltsübersicht Kurzfassung Abstract Resume 1. Einleitung 2. Untersuchungsgebiet 3. Material und Methoden 4. Ergebnisse 4.1 Stechimmen und assoziierte Tierarten der Tuffsteilwand 4.2 Stechimmenfauna der Gruben insgesamt 4.3 Bemerkenswerte Nachweise 5. Diskussion 5.1 Die Seidenbiene im Zentrum der Steilwandbiozönose 5.2 Bedeutung von Tuff- und Lavagruben für den Arten- und Biotopschutz 6. Literatur Kurzfassung Die vorliegende Arbeit beschäftigt sich mit den Hymenoptera Aculeata der Tuff- und Lavagruben des Westeifeier Vulkanfeldes. Die vegetationslosen Steilwände dieser Ab­ grabungen sind relativ artenarm. Dabei ist unter den Primärbesiedlem die Seidenbiene Colletes daviesanus in vielen Fällen die eudominante Spezies. Dagegen treten die we­ nigen anderen selbstgrabenden Arten, die alle zur Familie der Sphecidae gehören, von der Individuenzahl her deutlich zurück. Zu den Folgenutzern der geschaffenen Bauten gehören eine Art der Pompilidae und sechs Spezies der Apidae. Außerdem wurden w Baustein der BMU-Aktion „Leben braucht Vielfalt“. braucht o * Herrn Prof. Dr. Albrecht EGELHAAF zum 80. Geburtstag gewidmet. 1116 Fauna Flora Rheinland-Pfalz 9: Heft 4, 2002, S.l 115-1154 noch Arachnida, Collembola, Dermaptera, Diptera und Hymenoptera als Kommensalen, Prädatoren oder Parasitoide registriert, so dass sich das Nahrungsnetz in der Steilwand in erster Näherung beschreiben lässt.
    [Show full text]
  • 50 Years of Petrology
    spe500-01 1st pgs page 1 The Geological Society of America 18888 201320 Special Paper 500 2013 CELEBRATING ADVANCES IN GEOSCIENCE Plates, planets, and phase changes: 50 years of petrology David Walker* Department of Earth and Environmental Sciences, Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York 10964, USA ABSTRACT Three advances of the previous half-century fundamentally altered petrology, along with the rest of the Earth sciences. Planetary exploration, plate tectonics, and a plethora of new tools all changed the way we understand, and the way we explore, our natural world. And yet the same large questions in petrology remain the same large questions. We now have more information and understanding, but we still wish to know the following. How do we account for the variety of rock types that are found? What does the variety and distribution of these materials in time and space tell us? Have there been secular changes to these patterns, and are there future implications? This review examines these bigger questions in the context of our new understand- ings and suggests the extent to which these questions have been answered. We now do know how the early evolution of planets can proceed from examples other than Earth, how the broad rock cycle of the present plate tectonic regime of Earth works, how the lithosphere atmosphere hydrosphere and biosphere have some connections to each other, and how our resources depend on all these things. We have learned that small planets, whose early histories have not been erased, go through a wholesale igneous processing essentially coeval with their formation.
    [Show full text]
  • Geopark Progress Reports
    EUROPEAN GEOPARKS NETWORK Geopark Progress Reports March 2012- September 2012 Updated: 2012-09-16 INDEX OF GEOPARKS Page Adamello Brenta – ITALY 3 Apuan Alps - ITALY 5 Arouca - PORTUGAL 7 Basque Coast – SPAIN 9 Bauges – FRANCE 11 Beigua - ITALY 13 Bergstrasse-Odenwald - GERMANY 15 Bohemian Paradise – CZECH REPUBLIC 17 Burren and Cliffs of Moher- REPUBLIC OF IRELAND 19 Cabo de Gata – Nijar Natural Park - SPAIN 21 Chelmos Vouraikos – GREECE 23 Copper Coast – IRELAND 24 English Riviera – UK 26 Fforest Fawr – Wales, UK 28 Gea Norvegica – NORWAY 30 GeoMon – Wales, UK 31 Harz Braunschweiger Land Ostfalen – GERMANY 33 Hateg Country Dinosaurs – ROMANIA 35 Katla – ICELAND 37 Madonie Geopark – ITALY 39 Maestrazgo Cultural Park – SPAIN 41 Magma – NORWAY 43 Marble Arch Caves– NORTHERN IRELAND and REP OF IRELAND 45 Muskau Arch – GERMANY and POLAND 47 Naturtejo – PORTUGAL 49 North Pennines AONB – ENGLAND UK 51 Novohrad-Nógrád - HUNGARY and SLOVAKIA 53 Papuk – CROATIA 55 Parco Nazionale del Cilento e Vallo di Diano, Campania – ITALY 57 Park Naturel Régional du Luberon – FRANCE 59 Petrified Forest of Lesvos – GREECE 61 Psiloritis Natural Park – GREECE 63 Rocca di Cerere – ITALY 64 Rokua – FINLAND 66 Shetland – SCOTLAND UK 68 Sierra Norte de Sevilla Natural Park - SPAIN 70 Sierras Subbeticas Natural Park – SPAIN 72 Sobrarbe – SPAIN 74 Steirische Eisenwurzen – AUSTRIA 76 Swabian Alb – GERMANY 78 Terra.Vita Naturpark – GERMANY 80 Vikos Aoos – GREECE 82 Villuercas-Ibores-Jara – SPAIN 84 Vulkaneifel European – GERMANY 86 1 No report from: North West Highlands – SCOTLAND UK; Réserve Géologique de Haute - Provence – FRANCE, Sardenia Geominerario Park – ITALY and Tuskan Mining Geopark - ITALY. 2 Adamello Brenta Nature Park – ITALY Adamello Brenta Nature Park, consistently with its wider and more complex conservation strategy of the natural, historical and cultural heritage, has continued its work to improve the geological heritage conservation and geotouristic and popularization activities.
    [Show full text]
  • Executive Intelligence Review, Volume 17, Number 15, April 6, 1990
    LAROUCHE So, You Wish to Leant All About BUT YOU'D BEDER EconoInics? KNOW WHAT H. Jr. HE HAS TO SAY by Lyndon LaRouche, A text on elementary mathematical economics, by the world's leading economist. Find out why EIR was right, when everyone else was wrong. The Power of Order from: Ben Franklin Booksellers, Inc. Reason: 1988 27 South King Street Leesburg, Va. 22075 An Autobiography by Lyndon H. LaRouche, Jr. $9.95 plus shipping ($1.50 for first book, $.50 for each additional book). Information on bulk rates and videotape Published by Executive Intelligence Review Order from Ben Franklin Booksellers, 27 South King St., Leesburg, VA 22075. available on request. $10 plus shipping ($1.50 for first copy, .50 for each ad,:::ional). Bulk rates available. THE POWER OF REASON 1iM.'" An exciting new videotape is now available on the life and work of Lyndon LaRouche, political leader and scientist, who is currently an American political prisoner, together with six of his leading associates. This tape includes clips of some of LaRouche's most important, historic speeches, on economics, history, culture, science, AIDS, and t e drug trade. , This tape will recruit your friends to the fight forr Western civilization! Order it today! $100.00 Checks or money orders should be sent to: P.O. Box 535, Leesburg, VA 22075 HumanPlease specify Rights whether Fund you wish Beta or VHS. Allow 4 weeks for delivery. Founder and Contributing Editor: From the Editor Lyndon H. LaRouche. Jr. Editor: Nora Hamerman Managing Editors: John Sigerson, Susan Welsh Assistant Managing Editor: Ronald Kokinda Editorial Board: Warren Hamerman.
    [Show full text]
  • Arxiv:2003.06799V2 [Astro-Ph.EP] 6 Feb 2021
    Thomas Ruedas1,2 Doris Breuer2 Electrical and seismological structure of the martian mantle and the detectability of impact-generated anomalies final version 18 September 2020 published: Icarus 358, 114176 (2021) 1Museum für Naturkunde Berlin, Germany 2Institute of Planetary Research, German Aerospace Center (DLR), Berlin, Germany arXiv:2003.06799v2 [astro-ph.EP] 6 Feb 2021 The version of record is available at http://dx.doi.org/10.1016/j.icarus.2020.114176. This author pre-print version is shared under the Creative Commons Attribution Non-Commercial No Derivatives License (CC BY-NC-ND 4.0). Electrical and seismological structure of the martian mantle and the detectability of impact-generated anomalies Thomas Ruedas∗ Museum für Naturkunde Berlin, Germany Institute of Planetary Research, German Aerospace Center (DLR), Berlin, Germany Doris Breuer Institute of Planetary Research, German Aerospace Center (DLR), Berlin, Germany Highlights • Geophysical subsurface impact signatures are detectable under favorable conditions. • A combination of several methods will be necessary for basin identification. • Electromagnetic methods are most promising for investigating water concentrations. • Signatures hold information about impact melt dynamics. Mars, interior; Impact processes Abstract We derive synthetic electrical conductivity, seismic velocity, and density distributions from the results of martian mantle convection models affected by basin-forming meteorite impacts. The electrical conductivity features an intermediate minimum in the strongly depleted topmost mantle, sandwiched between higher conductivities in the lower crust and a smooth increase toward almost constant high values at depths greater than 400 km. The bulk sound speed increases mostly smoothly throughout the mantle, with only one marked change at the appearance of β-olivine near 1100 km depth.
    [Show full text]
  • Hvilke Faktorer Driver Kursutviklingen På Oslo Børs? Av
    A Service of Leibniz-Informationszentrum econstor Wirtschaft Leibniz Information Centre Make Your Publications Visible. zbw for Economics Næs, Randi; Skjeltorp, Johannes A.; Ødegaard, Bernt Arne Working Paper Hvilke faktorer driver kursutviklingen på Oslo Børs? Working Paper, No. 2007/8 Provided in Cooperation with: Norges Bank, Oslo Suggested Citation: Næs, Randi; Skjeltorp, Johannes A.; Ødegaard, Bernt Arne (2007) : Hvilke faktorer driver kursutviklingen på Oslo Børs?, Working Paper, No. 2007/8, ISBN 978-82-7553-403-1, Norges Bank, Oslo, http://hdl.handle.net/11250/2498266 This Version is available at: http://hdl.handle.net/10419/209884 Standard-Nutzungsbedingungen: Terms of use: Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Documents in EconStor may be saved and copied for your Zwecken und zum Privatgebrauch gespeichert und kopiert werden. personal and scholarly purposes. Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle You are not to copy documents for public or commercial Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich purposes, to exhibit the documents publicly, to make them machen, vertreiben oder anderweitig nutzen. publicly available on the internet, or to distribute or otherwise use the documents in public. Sofern die Verfasser die Dokumente unter Open-Content-Lizenzen (insbesondere CC-Lizenzen) zur Verfügung gestellt haben sollten, If the documents have been made available under an Open gelten abweichend von diesen Nutzungsbedingungen die in der dort Content Licence (especially Creative Commons Licences), you genannten Lizenz gewährten Nutzungsrechte. may exercise further usage rights as specified in the indicated licence. https://creativecommons.org/licenses/by-nc-nd/4.0/deed.no www.econstor.eu ANO 2007/8 Oslo 12.
    [Show full text]
  • From the Late Cretaceous (Campanian) Kanguk Formation of Axel Heiberg Island, Nunavut, Canada, and Its Ecological and Geographical Implications MATTHEW J
    ARCTIC VOL. 67, NO. 1 (MARCH 2014) P. 1 – 9 A Hadrosaurid (Dinosauria: Ornithischia) from the Late Cretaceous (Campanian) Kanguk Formation of Axel Heiberg Island, Nunavut, Canada, and Its Ecological and Geographical Implications MATTHEW J. VAVREK,1 LEN V. HILLS2 and PHILIP J. CURRIE3 (Received 1 October 2012; accepted in revised form 30 May 2013) ABSTRACT. A hadrosaurid vertebra was recovered during a palynological survey of the Upper Cretaceous Kanguk Formation in the eastern Canadian Arctic. This vertebra represents the farthest north record of any non-avian dinosaur to date. Although highly abraded, the fossil nonetheless represents an interesting biogeographic data point. During the Campanian, when this vertebra was deposited, the eastern Canadian Arctic was likely isolated both from western North America by the Western Interior Seaway and from more southern regions of eastern North America by the Hudson Seaway. This fossil suggests that large-bodied hadrosaurid dinosaurs may have inhabited a large polar insular landmass during the Late Cretaceous, where they would have lived year-round, unable to migrate to more southern regions during winters. It is possible that the resident herbivorous dinosaurs could have fed on non-deciduous conifers, as well as other woody twigs and stems, during the long, dark winter months when most deciduous plant species had lost their leaves. Key words: Appalachia, Arctic, Campanian, dinosaur, Laramidia, palaeobiogeography RÉSUMÉ. La vertèbre d’un hadrosauridé a été retrouvée pendant l’étude palynologique de la formation Kanguk remontant au Crétacé supérieur, dans l’est de l’Arctique canadien. Il s’agit de la vertèbre appartenant à un dinosaure non avien qui a été recueillie la plus au nord jusqu’à maintenant.
    [Show full text]