Supercontinent Reconstruction the Palaeomagnetically Viable, Long
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Record of the Angola Portion of the Congo Craton: Newly Dated Magmatic Events at 1500 and 1110 Ma and Implications for Nuna (Columbia) Supercontinent Reconstructions
NOTICE: This is the author’s version of a work that was accepted for publication in Precambrian Research. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Precambrian Research, Vol. 230 (2013). doi: 10.1016/j.precamres.2013.01.010 Accepted Manuscript Title: Mesoproterozoic intraplate magmatic ‘barcode’ record of the Angola portion of the Congo craton: newly dated magmatic events at 1500 and 1110 Ma and implications for Nuna (Columbia) supercontinent reconstructions Authors: Richard E. Ernst, Eurico Pereira, Michael A. Hamilton, Sergei A. Pisarevsky, Jose´ Rodriques, Colombo C.G. Tassinari, Wilson Teixeira, Vitoria´ Van-Dunem PII: S0301-9268(13)00011-9 DOI: doi:10.1016/j.precamres.2013.01.010 Reference: PRECAM 3703 To appear in: Precambrian Research Received date: 24-7-2012 Revised date: 26-11-2012 Accepted date: 3-1-2013 Please cite this article as: Ernst, R.E., Pereira, E., Pisarevsky, S.A., Rodriques, J., Tassinari, C.C.G., Teixeira, W., Van-Dunem, V., Mesoproterozoic intraplate magmatic ‘barcode’ record of the Angola portion of the Congo craton: newly dated magmatic events at 1500 and 1110 Ma and implications for Nuna (Columbia) supercontinent reconstructions, Precambrian Research (2010), doi:10.1016/j.precamres.2013.01.010 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. -
Timeline of Natural History
Timeline of natural history This timeline of natural history summarizes significant geological and Life timeline Ice Ages biological events from the formation of the 0 — Primates Quater nary Flowers ←Earliest apes Earth to the arrival of modern humans. P Birds h Mammals – Plants Dinosaurs Times are listed in millions of years, or Karo o a n ← Andean Tetrapoda megaanni (Ma). -50 0 — e Arthropods Molluscs r ←Cambrian explosion o ← Cryoge nian Ediacara biota – z ←Earliest animals o ←Earliest plants i Multicellular -1000 — c Contents life ←Sexual reproduction Dating of the Geologic record – P r The earliest Solar System -1500 — o t Precambrian Supereon – e r Eukaryotes Hadean Eon o -2000 — z o Archean Eon i Huron ian – c Eoarchean Era ←Oxygen crisis Paleoarchean Era -2500 — ←Atmospheric oxygen Mesoarchean Era – Photosynthesis Neoarchean Era Pong ola Proterozoic Eon -3000 — A r Paleoproterozoic Era c – h Siderian Period e a Rhyacian Period -3500 — n ←Earliest oxygen Orosirian Period Single-celled – life Statherian Period -4000 — ←Earliest life Mesoproterozoic Era H Calymmian Period a water – d e Ectasian Period a ←Earliest water Stenian Period -4500 — n ←Earth (−4540) (million years ago) Clickable Neoproterozoic Era ( Tonian Period Cryogenian Period Ediacaran Period Phanerozoic Eon Paleozoic Era Cambrian Period Ordovician Period Silurian Period Devonian Period Carboniferous Period Permian Period Mesozoic Era Triassic Period Jurassic Period Cretaceous Period Cenozoic Era Paleogene Period Neogene Period Quaternary Period Etymology of period names References See also External links Dating of the Geologic record The Geologic record is the strata (layers) of rock in the planet's crust and the science of geology is much concerned with the age and origin of all rocks to determine the history and formation of Earth and to understand the forces that have acted upon it. -
Mineralogy and Geochemistry of Some Belt Rocks, Montana and Idaho
Mineralogy and Geochemistry of Some Belt Rocks, Montana and Idaho By J. E. HARRISON and D. J. GRIMES CONTRIBUTIONS TO ECONOMIC GEOLOGY GEOLOGICAL SURVEY BULLETIN 1312-O A comparison of rocks from two widely separated areas in Belt terrane UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1970 UNITED STATES DEPARTMENT OF THE INTERIOR WALTER J. HICKEL, Secretary GEOLOGICAL SURVEY William T. Pecora, Director Library of Congress catalog-card No. 75-607766 4- V For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 Price 35 cents CONTENTS Page Abstract .................................................................................................................. Ol Introduction ............................:.................................... .......................................... 2 General geology ...............................................................;.'................................... 3 Methods of investigation ........................y .............................................................. 7 Sampling procedure ..............................:....................................................... 7 Analytical technique for mineralogy ...............:............................................ 11 Analytical technique and calculations for geochemistry................................ 13 Mineralogy of rock types........................................................................................ 29 Geochemistry ......................................................................................................... -
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. -
The North-Subducting Rheic Ocean During the Devonian: Consequences for the Rhenohercynian Ore Sites
Published in "International Journal of Earth Sciences 106(7): 2279–2296, 2017" which should be cited to refer to this work. The north-subducting Rheic Ocean during the Devonian: consequences for the Rhenohercynian ore sites Jürgen F. von Raumer1 · Heinz-Dieter Nesbor2 · Gérard M. Stampfli3 Abstract Base metal mining in the Rhenohercynian Zone activated Early Devonian growth faults. Hydrothermal brines has a long history. Middle-Upper Devonian to Lower Car- equilibrated with the basement and overlying Middle-Upper boniferous sediment-hosted massive sulfide deposits Devonian detrital deposits forming the SHMS deposits in the (SHMS), volcanic-hosted massive sulfide deposits (VHMS) southern part of the Pyrite Belt, in the Rhenish Massif and and Lahn-Dill-type iron, and base metal ores occur at sev- in the Harz areas. Volcanic-hosted massive sulfide deposits eral sites in the Rhenohercynian Zone that stretches from the (VHMS) formed in the more eastern localities of the Rheno- South Portuguese Zone, through the Lizard area, the Rhen- hercynian domain. In contrast, since the Tournaisian period ish Massif and the Harz Mountain to the Moravo-Silesian of ore formation, dominant pull-apart triggered magmatic Zone of SW Bohemia. During Devonian to Early Carbonif- emplacement of acidic rocks, and their metasomatic replace- erous times, the Rhenohercynian Zone is seen as an evolv- ment in the apical zones of felsic domes and sediments in ing rift system developed on subsiding shelf areas of the the northern part of the Iberian Pyrite belt, thus changing the Old Red continent. A reappraisal of the geotectonic setting general conditions of ore precipitation. -
Sticta Arctica Degel.] Arctic Moon Habitat/Range: Over Mosses and Mossy Rocks in Alpine Localities; N Am – Eastern Eurasia, N to AK, S to OR
STICTA/UMBILICARIA [Sticta arctica Degel.] Arctic moon Habitat/Range: Over mosses and mossy rocks in alpine localities; N Am – eastern Eurasia, N to AK, S to OR. Reaction: All spot tests negative. Contents: No lichen substances reported. Notes: Not recorded from B.C., but known to occur in southern coastal Alaska only a few kilometres from the B.C. border. Sticta fuliginosa (Hoffm.) Ach. Peppered moon (sooty leather lichen) Habitat/Range: Frequent over deciduous trees and conifers, also over mossy rock, in humid forests at lower eleva- tions throughout, except absent from boreal regions; incompletely circumpolar, N to AK, S to CA. Reaction: All spot tests negative. Contents: No lichen substances reported. Sticta limbata (Sm.) Ach. Powdered moon Habitat/Range: Infrequent over deciduous trees and especially mossy rock in open coastal forests at lower eleva- tions, also rare in intermontane (ICH zone); western N Am – eastern N Am – western Eurasia, N to AK, S to CA. Reactions: All spot tests negative. Contents: No lichen substances reported. Sticta weigelii (Ach.) Vainio Map 107 Fringed moon (Weigel’s leather lichen) Habitat/Range: Rare over trees and shrubs in open coastal forests at lower elevations; western N Am – eastern N Am – eastern Eurasia, N to AK, S to CA. Reactions: All spot tests negative. Contents: No lichen substances reported. Sticta wrightii Tuck. Map 108 Green moon Habitat/Range: Rare over conifers in semi-shady intermontane old-growth forests at lower elevations; western N Am – eastern Eurasia, N to AK, S to BC. Reactions: All spot tests negative. Contents: No lichen substances reported. Sticta sp. -
Balkatach Hypothesis: a New Model for the Evolution of the Pacific, Tethyan, and Paleo-Asian Oceanic Domains
Research Paper GEOSPHERE Balkatach hypothesis: A new model for the evolution of the Pacific, Tethyan, and Paleo-Asian oceanic domains 1,2 2 GEOSPHERE, v. 13, no. 5 Andrew V. Zuza and An Yin 1Nevada Bureau of Mines and Geology, University of Nevada, Reno, Nevada 89557, USA 2Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, California 90095-1567, USA doi:10.1130/GES01463.1 18 figures; 2 tables; 1 supplemental file ABSTRACT suturing. (5) The closure of the Paleo-Asian Ocean in the early Permian was accompanied by a widespread magmatic flare up, which may have been CORRESPONDENCE: avz5818@gmail .com; The Phanerozoic history of the Paleo-Asian, Tethyan, and Pacific oceanic related to the avalanche of the subducted oceanic slabs of the Paleo-Asian azuza@unr .edu domains is important for unraveling the tectonic evolution of the Eurasian Ocean across the 660 km phase boundary in the mantle. (6) The closure of the and Laurentian continents. The validity of existing models that account for Paleo-Tethys against the southern margin of Balkatach proceeded diachro- CITATION: Zuza, A.V., and Yin, A., 2017, Balkatach hypothesis: A new model for the evolution of the the development and closure of the Paleo-Asian and Tethyan Oceans criti- nously, from west to east, in the Triassic–Jurassic. Pacific, Tethyan, and Paleo-Asian oceanic domains: cally depends on the assumed initial configuration and relative positions of Geosphere, v. 13, no. 5, p. 1664–1712, doi:10.1130 the Precambrian cratons that separate the two oceanic domains, including /GES01463.1. the North China, Tarim, Karakum, Turan, and southern Baltica cratons. -
Oil Pollution in the Black and Caspian Seas
Article Satellite Survey of Inner Seas: Oil Pollution in the Black and Caspian Seas Marina Mityagina and Olga Lavrova * Space Research Institute of Russian Academy of Sciences, Moscow 117997, Russia; [email protected] * Correspondence: [email protected]; Tel.: +7-495-333-4256 Academic Editors: Elijah Ramsey III, Ira Leifer, Bill Lehr, Xiaofeng Li and Prasad S. Thenkabail Received: 5 June 2016; Accepted: 17 October 2016; Published: 23 October 2016 Abstract: The paper discusses our studies of oil pollution in the Black and Caspian Seas. The research was based on a multi-sensor approach on satellite survey data. A combined analysis of oil film signatures in satellite synthetic aperture radar (SAR) and optical imagery was performed. Maps of oil spills detected in satellite imagery of the whole aquatic area of the Black Sea and the Middle and the Southern Caspian Sea are created. Areas of the heaviest pollution are outlined. It is shown that the main types of sea surface oil pollution are ship discharges and natural marine hydrocarbon seepages. For each type of pollution and each sea, regions of regular pollution occurrence were determined, polluted areas were estimated, and specific manifestation features were revealed. Long-term observations demonstrate that in recent years, illegal wastewater discharges into the Black Sea have become very common, which raises serious environmental issues. Manifestations of seabed hydrocarbon seepages were also detected in the Black Sea, primarily in its eastern part. The patterns of surface oil pollution of the Caspian Sea differ considerably from those observed in the Black Sea. They are largely determined by presence of big seabed oil and gas deposits. -
The Geology of England – Critical Examples of Earth History – an Overview
The Geology of England – critical examples of Earth history – an overview Mark A. Woods*, Jonathan R. Lee British Geological Survey, Environmental Science Centre, Keyworth, Nottingham, NG12 5GG *Corresponding Author: Mark A. Woods, email: [email protected] Abstract Over the past one billion years, England has experienced a remarkable geological journey. At times it has formed part of ancient volcanic island arcs, mountain ranges and arid deserts; lain beneath deep oceans, shallow tropical seas, extensive coal swamps and vast ice sheets; been inhabited by the earliest complex life forms, dinosaurs, and finally, witnessed the evolution of humans to a level where they now utilise and change the natural environment to meet their societal and economic needs. Evidence of this journey is recorded in the landscape and the rocks and sediments beneath our feet, and this article provides an overview of these events and the themed contributions to this Special Issue of Proceedings of the Geologists’ Association, which focuses on ‘The Geology of England – critical examples of Earth History’. Rather than being a stratigraphic account of English geology, this paper and the Special Issue attempts to place the Geology of England within the broader context of key ‘shifts’ and ‘tipping points’ that have occurred during Earth History. 1. Introduction England, together with the wider British Isles, is blessed with huge diversity of geology, reflected by the variety of natural landscapes and abundant geological resources that have underpinned economic growth during and since the Industrial Revolution. Industrialisation provided a practical impetus for better understanding the nature and pattern of the geological record, reflected by the publication in 1815 of the first geological map of Britain by William Smith (Winchester, 2001), and in 1835 by the founding of a national geological survey. -
New Constraints on Intraplate Orogeny in the South China Continent
Gondwana Research 24 (2013) 902–917 Contents lists available at ScienceDirect Gondwana Research journal homepage: www.elsevier.com/locate/gr Systematic variations in seismic velocity and reflection in the crust of Cathaysia: New constraints on intraplate orogeny in the South China continent Zhongjie Zhang a,⁎, Tao Xu a, Bing Zhao a, José Badal b a State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China b Physics of the Earth, Sciences B, University of Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain article info abstract Article history: The South China continent has a Mesozoic intraplate orogeny in its interior and an oceanward younging in Received 16 December 2011 postorogenic magmatic activity. In order to determine the constraints afforded by deep structure on the for- Received in revised form 15 May 2012 mation of these characteristics, we reevaluate the distribution of crustal velocities and wide-angle seismic re- Accepted 18 May 2012 flections in a 400 km-long wide-angle seismic profile between Lianxian, near Hunan Province, and Gangkou Available online 18 June 2012 Island, near Guangzhou City, South China. The results demonstrate that to the east of the Chenzhou-Linwu Fault (CLF) (the southern segment of the Jiangshan–Shaoxing Fault), the thickness and average P-wave veloc- Keywords: Wide-angle seismic data ity both of the sedimentary layer and the crystalline basement display abrupt lateral variations, in contrast to Crustal velocity layering to the west of the fault. This suggests that the deformation is well developed in the whole of the crust Frequency filtering beneath the Cathaysia block, in agreement with seismic evidence on the eastwards migration of the orogeny Migration and stacking and the development of a vast magmatic province. -
EGP Sale Uruguay
Media Relations PRESS T +39 06 8305 5699 RELEASE F +39 06 8305 3771 [email protected] enelgreenpower.com ENEL GREEN POWER STEPS OUT OF URUGUAY THROUGH SALE OF 50 MW WIND FARM FOR 120 MILLION US DOLLARS • EGP closed the sale to Atlantica Yield of Enel Green Power Uruguay S.A., 100% owner of the Melowind plant • The transaction is part of Enel’s active portfolio management strategy, rotating assets to finance growth in strategic areas Rome, December 14th , 2018 – Enel Green Power S.p.A. (“EGP”) closed the sale to power company Atlantica Yield of its fully-owned subsidiary Enel Green Power Uruguay S.A. (“EGP Uruguay”), which owns through its project company Estrellada S.A. the 50 MW Melowind wind farm located in Cerro Largo, around 320 km away from Montevideo. EGP has sold its subsidiary in Uruguay for around 120 million US dollars, equal to the company’s Enterprise Value. The transaction is part of the disposal programme of non-core assets provided for in the Enel Group’s active portfolio management plan. This strategy allows for the reallocation of resources to areas with a greater growth margin and potential for the Group. The Melowind farm sells its electricity output to the state-owned power company UTE (Administración Nacional de Usinas y Trasmisiones Eléctricas), which manages the transmission, distribution and sale of electricity in Uruguay, under a 20-year power purchase agreement (PPA). Atlantica Yield plc owns a diversified portfolio of contracted renewable energy, efficient natural gas, electric transmission and water assets in North and South America, and certain markets in Europe, the Middle East and Africa (EMEA). -
High Elevation Cultural Use of the Big Belt Mountains: a Possible Mountain Tradition Connection
St. Cloud State University theRepository at St. Cloud State Culminating Projects in Cultural Resource Management Department of Anthropology 5-2020 High Elevation Cultural Use of the Big Belt Mountains: A Possible Mountain Tradition Connection Arian Randall Follow this and additional works at: https://repository.stcloudstate.edu/crm_etds Recommended Citation Randall, Arian, "High Elevation Cultural Use of the Big Belt Mountains: A Possible Mountain Tradition Connection" (2020). Culminating Projects in Cultural Resource Management. 34. https://repository.stcloudstate.edu/crm_etds/34 This Thesis is brought to you for free and open access by the Department of Anthropology at theRepository at St. Cloud State. It has been accepted for inclusion in Culminating Projects in Cultural Resource Management by an authorized administrator of theRepository at St. Cloud State. For more information, please contact [email protected]. High Elevation Cultural Use of the Big Belt Mountains: A Possible Mountain Tradition Connection by Arian L. Randall A Thesis Submitted to the Graduate Faculty of St. Cloud State University in Partial Fulfillment of the Requirements for the Degree Master of Science in Cultural Resource Management, Archaeology May 6, 2020 Thesis Committee: Mark Muñiz, Chairperson Rob Mann Lauri Travis 2 Abstract The Sundog site (24LC2289) was first discovered in 2013 during a field school survey with Carroll College and the Helena-Lewis & Clark National Forest. This archaeological site is located at an elevation of 6,400ft above sea-level in the Northern Big Belt Mountains in Montana. The Sundog Site is a multi- component site with occupations from the Late Paleoindian period to the Late Prehistoric period. This site is significant due to its intact cultural deposits in a high-altitude park, in an elevational range that currently has a data gap.