A History of Supercontinents on Planet Earth
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Assembly, Configuration, and Break-Up History of Rodinia
Author's personal copy Available online at www.sciencedirect.com Precambrian Research 160 (2008) 179–210 Assembly, configuration, and break-up history of Rodinia: A synthesis Z.X. Li a,g,∗, S.V. Bogdanova b, A.S. Collins c, A. Davidson d, B. De Waele a, R.E. Ernst e,f, I.C.W. Fitzsimons g, R.A. Fuck h, D.P. Gladkochub i, J. Jacobs j, K.E. Karlstrom k, S. Lu l, L.M. Natapov m, V. Pease n, S.A. Pisarevsky a, K. Thrane o, V. Vernikovsky p a Tectonics Special Research Centre, School of Earth and Geographical Sciences, The University of Western Australia, Crawley, WA 6009, Australia b Department of Geology, Lund University, Solvegatan 12, 223 62 Lund, Sweden c Continental Evolution Research Group, School of Earth and Environmental Sciences, University of Adelaide, Adelaide, SA 5005, Australia d Geological Survey of Canada (retired), 601 Booth Street, Ottawa, Canada K1A 0E8 e Ernst Geosciences, 43 Margrave Avenue, Ottawa, Canada K1T 3Y2 f Department of Earth Sciences, Carleton U., Ottawa, Canada K1S 5B6 g Tectonics Special Research Centre, Department of Applied Geology, Curtin University of Technology, GPO Box U1987, Perth, WA 6845, Australia h Universidade de Bras´ılia, 70910-000 Bras´ılia, Brazil i Institute of the Earth’s Crust SB RAS, Lermontova Street, 128, 664033 Irkutsk, Russia j Department of Earth Science, University of Bergen, Allegaten 41, N-5007 Bergen, Norway k Department of Earth and Planetary Sciences, Northrop Hall University of New Mexico, Albuquerque, NM 87131, USA l Tianjin Institute of Geology and Mineral Resources, CGS, No. -
Agricultural Value-Chains Assessment Report April 2020.Pdf
1 2 ABOUT THE EUROPEAN UNION The Member States of the European Union have decided to link together their know-how, resources and destinies. Together, they have built a zone of stability, democracy and sustainable development whilst maintaining cultural diversity, tolerance and individual freedoms. The European Union is committed to sharing its achievements and its values with countries and peoples beyond its borders. ABOUT THE PUBLICATION: This publication was produced within the framework of the EU Green Agriculture Initiative in Armenia (EU-GAIA) project, which is funded by the European Union (EU) and the Austrian Development Cooperation (ADC), and implemented by the Austrian Development Agency (ADA) and the United Nations Development Programme (UNDP) in Armenia. In the framework of the European Union-funded EU-GAIA project, the Austrian Development Agency (ADA) hereby agrees that the reader uses this manual solely for non-commercial purposes. Prepared by: EV Consulting CJSC © 2020 Austrian Development Agency. All rights reserved. Licensed to the European Union under conditions. Yerevan, 2020 3 CONTENTS LIST OF ABBREVIATIONS ................................................................................................................................ 5 1. INTRODUCTION AND BACKGROUND ..................................................................................................... 6 2. OVERVIEW OF DEVELOPMENT DYNAMICS OF AGRICULTURE IN ARMENIA AND GOVERNMENT PRIORITIES..................................................................................................................................................... -
Proterozoic East Gondwana: Supercontinent Assembly and Breakup Geological Society Special Publications Society Book Editors R
Proterozoic East Gondwana: Supercontinent Assembly and Breakup Geological Society Special Publications Society Book Editors R. J. PANKHURST (CHIEF EDITOR) P. DOYLE E J. GREGORY J. S. GRIFFITHS A. J. HARTLEY R. E. HOLDSWORTH A. C. MORTON N. S. ROBINS M. S. STOKER J. P. TURNER Special Publication reviewing procedures The Society makes every effort to ensure that the scientific and production quality of its books matches that of its journals. Since 1997, all book proposals have been refereed by specialist reviewers as well as by the Society's Books Editorial Committee. If the referees identify weaknesses in the proposal, these must be addressed before the proposal is accepted. Once the book is accepted, the Society has a team of Book Editors (listed above) who ensure that the volume editors follow strict guidelines on refereeing and quality control. We insist that individual papers can only be accepted after satis- factory review by two independent referees. The questions on the review forms are similar to those for Journal of the Geological Society. The referees' forms and comments must be available to the Society's Book Editors on request. Although many of the books result from meetings, the editors are expected to commission papers that were not pre- sented at the meeting to ensure that the book provides a balanced coverage of the subject. Being accepted for presentation at the meeting does not guarantee inclusion in the book. Geological Society Special Publications are included in the ISI Science Citation Index, but they do not have an impact factor, the latter being applicable only to journals. -
Plate Tectonics Earthquakes in Christchurch and Northern Japan in 2011 and the Haiti Earthquake in 2010 Caused Massive Destruction and Loss of Life
PROOFS 5 PAGE PLATE TECTONICS Earthquakes in Christchurch and northern Japan in 2011 and the Haiti earthquake in 2010 caused massive destruction and loss of life. What caused these and other earthquakes and volcanic eruptionsUNCORRECTED in the Earth’s history? From space, the Earth looks very peaceful, but movements of the Earth’s surface can cause huge changes. Did you know that the highest place on the Earth, Mount Everest, was once under the sea? It has been pushed up by movements of the Earth’s surface. Similar fossil specimens and rock types have been found on opposite sides of vast oceans. How can this be explained? TECTONIC PLATES 5.1 Looking at a map of the world it is easy to see why people started wondering if the continents once fitted together like a giant jigsaw puzzle. The distribution of some plants and animals and even fossil species cannot be explained unless the continents had drifted apart over time. These continents have slowly moved across the face of the planet, separating and potentially isolating populations. Whilst these organisms have adapted to their new unique environmental conditions, the rocks that were formed when the continents were joined have remained the same. Students: » •outline how the theory of plate tectonics changed ideas about the structure of and changes in the Earth’s surface » •relate continental drift to convectionPROOFS currents and gravitational forces ACTIVITY AT PLAPAGETE BOUN DARIES 5.2 As the huge tectonic plates move across the surface of the Earth, they collide, grind past one another or slowly pull away from each other. -
Development Project Ideas Goris, Tegh, Gorhayk, Meghri, Vayk
Ministry of Territorial Administration and Development of the Republic of Armenia DEVELOPMENT PROJECT IDEAS GORIS, TEGH, GORHAYK, MEGHRI, VAYK, JERMUK, ZARITAP, URTSADZOR, NOYEMBERYAN, KOGHB, AYRUM, SARAPAT, AMASIA, ASHOTSK, ARPI Expert Team Varazdat Karapetyan Artyom Grigoryan Artak Dadoyan Gagik Muradyan GIZ Coordinator Armen Keshishyan September 2016 List of Acronyms MTAD Ministry of Territorial Administration and Development ATDF Armenian Territorial Development Fund GIZ German Technical Cooperation LoGoPro GIZ Local Government Programme LSG Local Self-government (bodies) (FY)MDP Five-year Municipal Development Plan PACA Participatory Assessment of Competitive Advantages RDF «Regional Development Foundation» Company LED Local economic development 2 Contents List of Acronyms ........................................................................................................................ 2 Contents ..................................................................................................................................... 3 Structure of the Report .............................................................................................................. 5 Preamble ..................................................................................................................................... 7 Introduction ................................................................................................................................ 9 Approaches to Project Implementation .................................................................................. -
TYPHUS EXANTHÉMATIQUE. TYPHUS. Amérique : America : Asie : Asia
— 420 Dernière période, ' t^^iode. précédente. ijdiest pértod. Prebious, period. D ate C. D. C. D. I n d e f r a n ç a i s e ; F r e n c h I n d i a ; Terr, de Karikal 26.VII-1.VIII 32 18 — — Karikal Terr. In d e p o r t u g a is e . P o r t u g u e s e I n d i a ; Velim 19-25.VII 1 — 1 !— Velim 5-ll.V II ■---- ----- 1 , 1 I r a k 2-8.V11I 4 — __ — I raq Li-wa de Muntafik » 3 — — — Muntaflq Liwa J a p o n : O saka 23-29.V1II 5 — 3 - — J a p a n : O saka T u r q u i e 1-31.V11 16 1 21 — T u r k e y VUayets: Kars » 1 1 — — Vilayets : Kars Ismid » 1 — — — Izmid Bitiis » 2 ___ — — Bitiis Sivas » I l — 21 — Sivas Europe ; Europe : F r a n c e 1-31.V11 36 63 — F r a n c e Dép. : Aube » 1 — — — Dept. : Aube Bouches-du-Rhône » 1 ----- 1 — Bouches-du-Rhône {varioloïde') » (varioloid) Dép. ; Eure » 14 54 — Dept. : Eure Nord » 20 — -----■ — Nord P o r t u g a l 1-30.VI 39 3 24 5 * P o r t u g a l T u r q u i e (Terr, en Europe) T u r k e y (European lerr.) ; Vilayet: Stamboul 1-31.VII . 1 — — — Vilayet: Istanbul * Chiffre corrigé. — Corrected figure. -
Map of How Earth Would Have Looked If Supercontinent Gondwana Had Broken up Differently
Map of How Earth Would Have Looked if Supercontinent Gondwana Had Broken Up Differently UK EDITION FRIDAY, 14TH MARCH, 2014 News Business Economy Technology Sport Entertainment & Arts Viewpoint Video Science Map of How Earth Would Have IBTIMES TV Looked if Supercontinent Gondwana Had Broken Up Differently By Hannah Osborne March 3, 2014 10:23 GMT + Recreation of Banksy Marks 3 Years of Syrian Crisis How Earth would have looked if rift had split continent differently. Sascha Brune/Christian Heine http://www.ibtimes.co.uk/map-how-earth-would-have-looked-if-supercontinent-gondwana-had-broken-differently-1438639[14/03/2014 12:00:17 pm] Map of How Earth Would Have Looked if Supercontinent Gondwana Had Broken Up Differently A map showing what Earth would have looked like had the supercontinent Gondwana broken up differently has been created by researchers. The map looks at how the world would be completely different if the South Atlantic and West African rift had split, instead of the rift that emerged along the Equatorial Atlantic margins. Geoscientists at the University of Sydney and the GFZ German Research Centre for Geosciences used sophisticated plate tectonic and 2D numerical modelling to create the map. The Gondwana supercontinent broke up 130 million years ago leading to the creation of South America and Africa. However, for millions of years before this, the southern continents of Why advertise with us South America, Africa, Antarctica, Australia, and India were united as Gondwana. READ MORE It is still unclear why Gondwana fragmented, but it is understood if first split along the East Africa coast in a western and eastern part, before South America separated. -
Precambrian Basement and Late Paleoproterozoic to Mesoproterozoic Tectonic Evolution of the SW Yangtze Block, South China
minerals Article Precambrian Basement and Late Paleoproterozoic to Mesoproterozoic Tectonic Evolution of the SW Yangtze Block, South China: Constraints from Zircon U–Pb Dating and Hf Isotopes Wei Liu 1,2,*, Xiaoyong Yang 1,*, Shengyuan Shu 1, Lei Liu 1 and Sihua Yuan 3 1 CAS Key Laboratory of Crust-Mantle Materials and Environments, University of Science and Technology of China, Hefei 230026, China; [email protected] (S.S.); [email protected] (L.L.) 2 Chengdu Center, China Geological Survey, Chengdu 610081, China 3 Department of Earthquake Science, Institute of Disaster Prevention, Langfang 065201, China; [email protected] * Correspondence: [email protected] (W.L.); [email protected] (X.Y.) Received: 27 May 2018; Accepted: 30 July 2018; Published: 3 August 2018 Abstract: Zircon U–Pb dating and Hf isotopic analyses are performed on clastic rocks, sedimentary tuff of the Dongchuan Group (DCG), and a diabase, which is an intrusive body from the base of DCG in the SW Yangtze Block. The results provide new constraints on the Precambrian basement and the Late Paleoproterozoic to Mesoproterozoic tectonic evolution of the SW Yangtze Block, South China. DCG has been divided into four formations from the bottom to the top: Yinmin, Luoxue, Heishan, and Qinglongshan. The Yinmin Formation, which represents the oldest rock unit of DCG, was intruded by a diabase dyke. The oldest zircon age of the clastic rocks from the Yinmin Formation is 3654 Ma, with "Hf(t) of −3.1 and a two-stage modeled age of 4081 Ma. Another zircon exhibits an age of 2406 Ma, with "Hf(t) of −20.1 and a two-stage modeled age of 4152 Ma. -
The Making and Unmaking of a Supercontinent: Rodinia Revisited
Tectonophysics 375 (2003) 261–288 www.elsevier.com/locate/tecto The making and unmaking of a supercontinent: Rodinia revisited Joseph G. Meerta,*, Trond H. Torsvikb a Department of Geological Sciences, University of Florida, 241 Williamson Hall, PO Box 11210 Gainesville, FL 32611, USA b Academy of Sciences (VISTA), c/o Geodynamics Center, Geological Survey of Norway, Leif Eirikssons vei 39, Trondheim 7491, Norway Received 11 April 2002; received in revised form 7 January 2003; accepted 5 June 2003 Abstract During the Neoproterozoic, a supercontinent commonly referred to as Rodinia, supposedly formed at ca. 1100 Ma and broke apart at around 800–700 Ma. However, continental fits (e.g., Laurentia vs. Australia–Antarctica, Greater India vs. Australia– Antarctica, Amazonian craton [AC] vs. Laurentia, etc.) and the timing of break-up as postulated in a number of influential papers in the early–mid-1990s are at odds with palaeomagnetic data. The new data necessitate an entirely different fit of East Gondwana elements and western Gondwana and call into question the validity of SWEAT, AUSWUS models and other variants. At the same time, the geologic record indicates that Neoproterozoic and early Paleozoic rift margins surrounded Laurentia, while similar-aged collisional belts dissected Gondwana. Collectively, these geologic observations indicate the breakup of one supercontinent followed rapidly by the assembly of another smaller supercontinent (Gondwana). At issue, and what we outline in this paper, is the difficulty in determining the exact geometry of the earlier supercontinent. We discuss the various models that have been proposed and highlight key areas of contention. These include the relationships between the various ‘external’ Rodinian cratons to Laurentia (e.g., Baltica, Siberia and Amazonia), the notion of true polar wander (TPW), the lack of reliable paleomagnetic data and the enigmatic interpretations of the geologic data. -
VAALBARA and TECTONIC EFFECTS of a MEGA IMPACT in the EARLY ARCHEAN 3470 Ma
Large Meteorite Impacts (2003) 4038.pdf VAALBARA AND TECTONIC EFFECTS OF A MEGA IMPACT IN THE EARLY ARCHEAN 3470 Ma T.E. Zegers and A. Ocampo European Space Agency, ESTEC, SCI-SB, Keplerlaan 1, 2201 AZ Noordwijk, [email protected] Abstract The oldest impact related layer recognized on Earth occur in greenstone sequences of the Kaapvaal (South Africa) and Pilbara (Australia) Craton, and have been dated at ca. 3470 Ma (Byerly et al., 2002). The simultaneous occurrence of impact layers now geographically widely separated have been taken to indicate that this was a worldwide phenomena, suggesting a very large impact: 10 to 100 times more massive than the Cretaceous-Tertiary event. However, the remarkable lithostratigraphic and chronostratigraphic similarities between the Pilbara and Kaapvaal Craton have been noted previously for the period between 3.5 and 2.7 Ga (Cheney et al., 1988). Paleomagnetic data from two ultramafic complexes in the Pilbara and Kaapvaal Craton showed that at 2.87 Ga the two cratons could have been part of one larger supercontinent called Vaalbara. New Paleomagnetic results from the older greenstone sequences (3.5 to 3.2 Ga) in the Pilbara and Kaapvaal Craton will be presented. The constructed apparent polar wander path for the two cratons shows remarkable similarities and overlap to a large extent. This suggests that the two cratons were joined for a considerable time during the Archean. Therefore, the coeval impact layers in the two cratons at 3.47 Ga do not necessarily suggest a worldwide phenomena on the present scale of separation of the two cratons. -
Trading Partners: Tectonic Ancestry of Southern Africa and Western Australia, In
Precambrian Research 224 (2013) 11–22 Contents lists available at SciVerse ScienceDirect Precambrian Research journa l homepage: www.elsevier.com/locate/precamres Trading partners: Tectonic ancestry of southern Africa and western Australia, in Archean supercratons Vaalbara and Zimgarn a,b,∗ c d,e f g Aleksey V. Smirnov , David A.D. Evans , Richard E. Ernst , Ulf Söderlund , Zheng-Xiang Li a Department of Geological and Mining Engineering and Sciences, Michigan Technological University, Houghton, MI 49931, USA b Department of Physics, Michigan Technological University, Houghton, MI 49931, USA c Department of Geology and Geophysics, Yale University, New Haven, CT 06520, USA d Ernst Geosciences, Ottawa K1T 3Y2, Canada e Carleton University, Ottawa K1S 5B6, Canada f Department of Earth and Ecosystem Sciences, Division of Geology, Lund University, SE 223 62 Lund, Sweden g Center of Excellence for Core to Crust Fluid Systems, Department of Applied Geology, Curtin University, Perth, WA 6845, Australia a r t i c l e i n f o a b s t r a c t Article history: Original connections among the world’s extant Archean cratons are becoming tractable by the use of Received 26 April 2012 integrated paleomagnetic and geochronologic studies on Paleoproterozoic mafic dyke swarms. Here we Received in revised form ∼ report new high-quality paleomagnetic data from the 2.41 Ga Widgiemooltha dyke swarm of the Yil- 19 September 2012 garn craton in western Australia, confirming earlier results from that unit, in which the primary origin Accepted 21 September 2012 of characteristic remanent magnetization is now confirmed by baked-contact tests. The correspond- Available online xxx ◦ ◦ ◦ ing paleomagnetic pole (10.2 S, 159.2 E, A95 = 7.5 ), in combination with newly available ages on dykes from Zimbabwe, allow for a direct connection between the Zimbabwe and Yilgarn cratons at 2.41 Ga, Keywords: Paleomagnetism with implied connections as early as their cratonization intervals at 2.7–2.6 Ga. -
GSA TODAY North-Central, P
Vol. 9, No. 10 October 1999 INSIDE • 1999 Honorary Fellows, p. 16 • Awards Nominations, p. 18, 20 • 2000 Section Meetings GSA TODAY North-Central, p. 27 A Publication of the Geological Society of America Rocky Mountain, p. 28 Cordilleran, p. 30 Refining Rodinia: Geologic Evidence for the Australia–Western U.S. connection in the Proterozoic Karl E. Karlstrom, [email protected], Stephen S. Harlan*, Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131 Michael L. Williams, Department of Geosciences, University of Massachusetts, Amherst, MA, 01003-5820, [email protected] James McLelland, Department of Geology, Colgate University, Hamilton, NY 13346, [email protected] John W. Geissman, Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131, [email protected] Karl-Inge Åhäll, Earth Sciences Centre, Göteborg University, Box 460, SE-405 30 Göteborg, Sweden, [email protected] ABSTRACT BALTICA Prior to the Grenvillian continent- continent collision at about 1.0 Ga, the southern margin of Laurentia was a long-lived convergent margin that SWEAT TRANSSCANDINAVIAN extended from Greenland to southern W. GOTHIAM California. The truncation of these 1.8–1.0 Ga orogenic belts in southwest- ern and northeastern Laurentia suggests KETILIDEAN that they once extended farther. We propose that Australia contains the con- tinuation of these belts to the southwest LABRADORIAN and that Baltica was the continuation to the northeast. The combined orogenic LAURENTIA system was comparable in