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Controls on Subaerial Erosion Rates in Antarctica
Edinburgh Research Explorer Controls on subaerial erosion rates in Antarctica Citation for published version: Marrero, S, Hein, A, Naylor, M, Attal, M, Shanks, R, Winter, K, Woodward, J, Dunning, S, Westoby, M & Sugden, D 2018, 'Controls on subaerial erosion rates in Antarctica' Earth and Planetary Science Letters, vol. 501, pp. 56-66. DOI: 10.1016/j.epsl.2018.08.018 Digital Object Identifier (DOI): 10.1016/j.epsl.2018.08.018 Link: Link to publication record in Edinburgh Research Explorer Document Version: Publisher's PDF, also known as Version of record Published In: Earth and Planetary Science Letters General rights Copyright for the publications made accessible via the Edinburgh Research Explorer is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recognise and abide by the legal requirements associated with these rights. Take down policy The University of Edinburgh has made every reasonable effort to ensure that Edinburgh Research Explorer content complies with UK legislation. If you believe that the public display of this file breaches copyright please contact [email protected] providing details, and we will remove access to the work immediately and investigate your claim. Download date: 05. Apr. 2019 Earth and Planetary Science Letters 501 (2018) 56–66 Contents lists available at ScienceDirect Earth and Planetary Science Letters www.elsevier.com/locate/epsl Controls on subaerial erosion rates in Antarctica ∗ Shasta M. Marrero a, , Andrew S. Hein a, Mark -
Friedrich-Alexander Universität Erlangen-Nürnberg
Petrologische und Geochemische Untersuchungen an ultramafischen und mafischen Gesteinen der Shackleton Range, Ost-Antarktis Zeugen des Zusammenschlusses Gondwanas und letzte Relikte eines einstigen Ozeans? Der Naturwissenschaftlichen Fakultät/ Dem Fachbereich Geographie und Geowissenschaften der Friedrich-Alexander-Universität Erlangen-Nürnberg zur Erlangung des Doktorgrades Dr. rer. Nat. vorgelegt von Tanja Romer aus Illertissen i Als Dissertation genehmigt von der Naturwissenschaftlichen Fakultät/ vom Fachbereich Geographie und Geowissenschaften der Friedrich-Alexander-Universität Erlangen-Nürnberg Tag der mündlichen Prüfung: 01.06.2017 Vorsitzende/r des Promotionsorgans: Prof. Dr. Georg Kreimer Gutachter/in: Prof. Dr. Esther Schmädicke Prof. Dr. Reiner Klemd ii Zusammenfassung Im östlichen Teil der Antarktis liegt die Shackleton Range. Es handelt sich hierbei um ein Kollisionsorogen, das nach heutigen Erkenntnissen der panafrikanischen Orogenese zugeordnet wird. Hinweise darauf finden sich im nördlichen Bereich (z.B. Haskard Highlands) der Shackleton Range. Hier treten granatführende, ultramafische Gesteine als Linsen, eingeschlossen in hochgradig metamorphen Gneisen auf. Die Linsen setzen sich hauptsächlich aus granat- und/oder spinell-führenden Pyroxeniten und untergeordnet auch Peridotiten zusammen. Die nähere Umgebung der Linsen wird vor allem durch Amphibolite dominiert. Die Pyroxenite enthalten teilweise eine Verwachsung von Granat und Olivin und sind damit ein eindeutiger Indikator für eine eklogitfazielle Metamorphose in diesem Bereich. Weiterhin zeugen sie als ultramafische Gesteine von einer möglichen Suturzone. In dieser Forschungsarbeit konnte mittels Mikrosondenanalytik an Granat, Ortho- und Klinopyroxen, Spinell, Olivin und Amphibol für die ultramafischen Gesteine ein Teil des im Uhrzeigersinn verlaufenden P-T-Pfads rekonstruiert werden. Thermobarometrische Berechnungen ergaben maximale Metamorphosetemperaturen von 800 bis 850 °C. Die maximal erreichten Drücke dürften zwischen 20 bis 23 kbar gelegen haben. -
A New Bed Elevation Model for the Weddell Sea Sector of the West Antarctic Ice Sheet
Earth Syst. Sci. Data, 10, 711–725, 2018 https://doi.org/10.5194/essd-10-711-2018 © Author(s) 2018. This work is distributed under the Creative Commons Attribution 4.0 License. A new bed elevation model for the Weddell Sea sector of the West Antarctic Ice Sheet Hafeez Jeofry1,2, Neil Ross3, Hugh F. J. Corr4, Jilu Li5, Mathieu Morlighem6, Prasad Gogineni7, and Martin J. Siegert1 1Grantham Institute and Department of Earth Science and Engineering, Imperial College London, South Kensington, London, UK 2School of Marine Science and Environment, Universiti Malaysia Terengganu, Kuala Terengganu, Terengganu, Malaysia 3School of Geography, Politics and Sociology, Newcastle University, Claremont Road, Newcastle Upon Tyne, UK 4British Antarctic Survey, Natural Environment Research Council, Cambridge, UK 5Center for the Remote Sensing of Ice Sheets, University of Kansas, Lawrence, Kansas, USA 6Department of Earth System Science, University of California, Irvine, Irvine, California, USA 7Department of Electrical and Computer Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, USA Correspondence: Hafeez Jeofry ([email protected]) and Martin J. Siegert ([email protected]) Received: 11 August 2017 – Discussion started: 26 October 2017 Revised: 26 October 2017 – Accepted: 5 February 2018 – Published: 9 April 2018 Abstract. We present a new digital elevation model (DEM) of the bed, with a 1 km gridding, of the Weddell Sea (WS) sector of the West Antarctic Ice Sheet (WAIS). The DEM has a total area of ∼ 125 000 km2 covering the Institute, Möller and Foundation ice streams, as well as the Bungenstock ice rise. In comparison with the Bedmap2 product, our DEM includes new aerogeophysical datasets acquired by the Center for Remote Sensing of Ice Sheets (CReSIS) through the NASA Operation IceBridge (OIB) program in 2012, 2014 and 2016. -
POSTER SESSION 5:30 P.M
Monday, July 27, 1998 POSTER SESSION 5:30 p.m. Edmund Burke Theatre Concourse MARTIAN AND SNC METEORITES Head J. W. III Smith D. Zuber M. MOLA Science Team Mars: Assessing Evidence for an Ancient Northern Ocean with MOLA Data Varela M. E. Clocchiatti R. Kurat G. Massare D. Glass-bearing Inclusions in Chassigny Olivine: Heating Experiments Suggest Nonigneous Origin Boctor N. Z. Fei Y. Bertka C. M. Alexander C. M. O’D. Hauri E. Shock Metamorphic Features in Lithologies A, B, and C of Martian Meteorite Elephant Moraine 79001 Flynn G. J. Keller L. P. Jacobsen C. Wirick S. Carbon in Allan Hills 84001 Carbonate and Rims Terho M. Magnetic Properties and Paleointensity Studies of Two SNC Meteorites Britt D. T. Geological Results of the Mars Pathfinder Mission Wright I. P. Grady M. M. Pillinger C. T. Further Carbon-Isotopic Measurements of Carbonates in Allan Hills 84001 Burckle L. H. Delaney J. S. Microfossils in Chondritic Meteorites from Antarctica? Stay Tuned CHONDRULES Srinivasan G. Bischoff A. Magnesium-Aluminum Study of Hibonites Within a Chondrulelike Object from Sharps (H3) Mikouchi T. Fujita K. Miyamoto M. Preferred-oriented Olivines in a Porphyritic Olivine Chondrule from the Semarkona (LL3.0) Chondrite Tachibana S. Tsuchiyama A. Measurements of Evaporation Rates of Sulfur from Iron-Iron Sulfide Melt Maruyama S. Yurimoto H. Sueno S. Spinel-bearing Chondrules in the Allende Meteorite Semenenko V. P. Perron C. Girich A. L. Carbon-rich Fine-grained Clasts in the Krymka (LL3) Chondrite Bukovanská M. Nemec I. Šolc M. Study of Some Achondrites and Chondrites by Fourier Transform Infrared Microspectroscopy and Diffuse Reflectance Spectroscopy Semenenko V. -
Antarctic Nomenclature Shortened by the Board on Geographic Names
hourly upper-air soundings. At Byrd and McMurdo included in the Boards new gazetteer of Antarctica, Stations, Navy crews were busy smoothing runways, now in press. setting out emergency lighting, reactivating naviga- The briefer forms are considered to be in the tional aids, and checking out equipment. The public interest and are consistent with trends in the Christchurch detachment of the Naval Support Force normal evolution of geographic names as well as the was asked to have a fuselage tank ready for installa- stated objectives of national committees concerned tion in the Hercules. with the naming of antarctic features. Short names are more convenient for radio transmission and for Commander Balish arrived in New Zealand on use on maps and charts, where the longer forms September 11 at 1125 hours. At 0959 on the fol- tend to obscure topographic detail and soundings. lowing day, he left Christchurch for McMurdo Sta- Also, experience has shown that long names are tion where he arrived at 1858. By this time, generally shortened when used in the field, regard- weather at Byrd Station had deteriorated and the less of the official name. fly-in had to be delayed for several hours. Dr. Hunt The shortened names are listed below with the reported that Spitz was resting comfortably, although coordinates of the features, followed by the previous his condition was gradually worsening. The emer- names in parentheses. In a few instances, the ge- gency, while real, was not acute. neric portion of the name has been amended to con- The Hercules departed McMurdo for Byrd Sta- form better with the nature of the geographic feature. -
Ice-Flow Structure and Ice Dynamic Changes in the Weddell Sea Sector
Bingham RG, Rippin DM, Karlsson NB, Corr HFJ, Ferraccioli F, Jordan TA, Le Brocq AM, Rose KC, Ross N, Siegert MJ. Ice-flow structure and ice-dynamic changes in the Weddell Sea sector of West Antarctica from radar-imaged internal layering. Journal of Geophysical Research: Earth Surface 2015, 120(4), 655-670. Copyright: ©2015 The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. DOI link to article: http://dx.doi.org/10.1002/2014JF003291 Date deposited: 04/06/2015 This work is licensed under a Creative Commons Attribution 4.0 International License Newcastle University ePrints - eprint.ncl.ac.uk PUBLICATIONS Journal of Geophysical Research: Earth Surface RESEARCH ARTICLE Ice-flow structure and ice dynamic changes 10.1002/2014JF003291 in the Weddell Sea sector of West Antarctica Key Points: from radar-imaged internal layering • RES-sounded internal layers in Institute/Möller Ice Streams show Robert G. Bingham1, David M. Rippin2, Nanna B. Karlsson3, Hugh F. J. Corr4, Fausto Ferraccioli4, fl ow changes 4 5 6 7 8 • Ice-flow reconfiguration evinced in Tom A. Jordan , Anne M. Le Brocq , Kathryn C. Rose , Neil Ross , and Martin J. Siegert Bungenstock Ice Rise to higher 1 2 tributaries School of GeoSciences, University of Edinburgh, Edinburgh, UK, Environment Department, University of York, York, UK, • Holocene dynamic reconfiguration 3Centre for Ice and Climate, Niels Bohr Institute, University -
Petrogenesis of the Metasediments from the Pioneers Escarpment, Shackleton Range, Antarctica
Polarforschung 63 (2/3): 165-182,1993 (erschienen 1995) Petrogenesis of the Metasediments from the Pioneers Escarpment, Shackleton Range, Antarctica By Norbcrt W. Roland', Martin Olcsch2 and Wolfgang Schubert' Summary: During the GEISHA expedition (Geologische Expedition in die during apre-Ross metarnorphic event or orogeny. The Ross Orogeny at about Shackleton Range 1987/88), the Pioneers Escarpment was visited and sampled 500 Ma probably just led to the weak greensehrst facies overprint that is evi extensively for the first time. Most of the rock types eneountered represent dent in the rocks of the Pioneers Group. amphibolite faeies metamorphics, but evidence for granulite facies conditions was found in cores of garnet. These conelitions must have been at least partly Finally, sedimentation resumed in the area of the present Shacklcton Range, or reached during the peak of metamorphism. at least in the eastern part of the Pioneers Escarpment, probably when detritus from erosion of the basement (Read Group and Pioneers Group) was deposi For the Pioneers Escarpment a varicolored succession of sedimentary anel bi ted, forming sandstones and greywackes of possibly Jurassie age. There is no modal volcanic origin is typical. It comprises: indication that these sediments belong to the former Turnpike Bluff Group. quartzites muscovite quartzite, sericite quartzite, fuchsite quartzite, garnet quartz schists etc.; Zusammenfassung: Während GEISHA (Geologische Expedition in die Shack pelites: mica schists and plagiocJase 01' plagioclase-microcline gneisses, alu leton Range 1987/88) wurde erstmals das Pioneers Escarpment der Shackleton minous schists; Range intensiver beprobt. Es treten Überwiegend Metamorphire der Amphibo marls and carbonates: grey meta-limestones, carbonaceous guartzites, but also litfazies auf. -
The Eastern Margin of the Ross Sea Rift in Western Marie Byrd Land
Characterization Geochemistry 3 Volume 4, Number 10 Geophysics 29 October 2003 1090, doi:10.1029/2002GC000462 GeosystemsG G ISSN: 1525-2027 AN ELECTRONIC JOURNAL OF THE EARTH SCIENCES Published by AGU and the Geochemical Society Eastern margin of the Ross Sea Rift in western Marie Byrd Land, Antarctica: Crustal structure and tectonic development Bruce P. Luyendyk Department of Geological Sciences and Institute for Crustal Studies, University of California, Santa Barbara, California 93106, USA ([email protected]) Douglas S. Wilson Department of Geological Sciences, Marine Science Institute, Institute for Crustal Studies, University of California, Santa Barbara, California 93106, USA Also at Marine Science Institute, University of California, Santa Barbara, California 93106, USA Christine S. Siddoway Department of Geology, Colorado College, Colorado Springs, Colorado 80903, USA [1] The basement rock and structures of the Ross Sea rift are exposed in coastal western Marie Byrd Land (wMBL), West Antarctica. Thinned, extended continental crust forms wMBL and the eastern Ross Sea continental shelf, where faults control the regional basin-and range-type topography at 20 km spacing. Onshore in the Ford Ranges and Rockefeller Mountains of wMBL, basement rocks consist of Early Paleozoic metagreywacke and migmatized equivalents, intruded by Devonian-Carboniferous and Cretaceous granitoids. Marine geophysical profiles suggest that these geological formations continue offshore to the west beneath the eastern Ross Sea, and are covered by glacial and glacial marine sediments. Airborne gravity and radar soundings over wMBL indicate a thicker crust and smoother basement inland to the north and east of the northern Ford Ranges. A migmatite complex near this transition, exhumed from mid crustal depths between 100–94 Ma, suggests a profound crustal discontinuity near the inboard limit of extended crust, 300 km northeast of the eastern Ross Sea margin. -
Out of the Blue: an Investigation of Two Alternative Sources of Deep Ice
This electronic thesis or dissertation has been downloaded from Explore Bristol Research, http://research-information.bristol.ac.uk Author: Burford, Rory Title: Out of the Blue An investigation of two alternative sources of deep ice General rights Access to the thesis is subject to the Creative Commons Attribution - NonCommercial-No Derivatives 4.0 International Public License. A copy of this may be found at https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode This license sets out your rights and the restrictions that apply to your access to the thesis so it is important you read this before proceeding. Take down policy Some pages of this thesis may have been removed for copyright restrictions prior to having it been deposited in Explore Bristol Research. However, if you have discovered material within the thesis that you consider to be unlawful e.g. breaches of copyright (either yours or that of a third party) or any other law, including but not limited to those relating to patent, trademark, confidentiality, data protection, obscenity, defamation, libel, then please contact [email protected] and include the following information in your message: •Your contact details •Bibliographic details for the item, including a URL •An outline nature of the complaint Your claim will be investigated and, where appropriate, the item in question will be removed from public view as soon as possible. OUT OF THE BLUE: AN INVESTIGATION OF TWO ALTERNATIVE SOURCES OF DEEP ICE Rory Joshua Burford A dissertation submitted to the University of Bristol in accordance with the requirements for award of the degree of MSc by Research in the Faculty of Science School of Geographical Sciences, September 2018 Word count: 29,408 Abstract The direct sampling of deep ice is an invaluable tool for environmental research, however the logistical, technical and financial difficulties associated with many direct sampling approaches renders them unfeasible for all but the largest research collaborations. -
Read Ebook {PDF EPUB} on the Run by Jacklyn Dumais on the Run by Jacklyn Dumais
Read Ebook {PDF EPUB} On the Run by Jacklyn Dumais On the Run by Jacklyn Dumais. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. What can I do to prevent this in the future? If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. Another way to prevent getting this page in the future is to use Privacy Pass. You may need to download version 2.0 now from the Chrome Web Store. Cloudflare Ray ID: 660fafe0fbc018e5 • Your IP : 116.202.236.252 • Performance & security by Cloudflare. On the Run by Jacklyn Dumais. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. What can I do to prevent this in the future? If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. Another way to prevent getting this page in the future is to use Privacy Pass. You may need to download version 2.0 now from the Chrome Web Store. -
Build-Up and Chronology of Blue Ice Moraines in Queen Maud Land, Antarctica
Research Collection Journal Article Build-up and chronology of blue ice moraines in Queen Maud Land, Antarctica Author(s): Akçar, Naki; Yeşilyurt, Serdar; Hippe, Kristina; Christl, Marcus; Vockenhuber, Christof; Yavuz, Vural; Özsoy, Burcu Publication Date: 2020-10 Permanent Link: https://doi.org/10.3929/ethz-b-000444919 Originally published in: Quaternary Science Advances 2, http://doi.org/10.1016/j.qsa.2020.100012 Rights / License: Creative Commons Attribution 4.0 International This page was generated automatically upon download from the ETH Zurich Research Collection. For more information please consult the Terms of use. ETH Library Quaternary Science Advances 2 (2020) 100012 Contents lists available at ScienceDirect Quaternary Science Advances journal homepage: www.journals.elsevier.com/quaternary-science-advances Build-up and chronology of blue ice moraines in Queen Maud Land, Antarctica Naki Akçar a,b,*, Serdar Yes¸ilyurt a,c, Kristina Hippe d, Marcus Christl d, Christof Vockenhuber d, Vural Yavuz e, Burcu Ozsoy€ b,f a Institute of Geological Sciences, University of Bern, Baltzerstrasse 1-3, 3012, Bern, Switzerland b Polar Research Institute, TÜBITAK Marmara Research Center, Gebze, Istanbul, Turkey c Department of Geography, Ankara University, Sıhhiye, 06100, Ankara, Turkey d Laboratory of Ion Beam Physics (LIP), ETH Zurich, Otto-Stern-Weg 5, 8093, Zurich, Switzerland e Faculty of Engineering, Turkish-German University, 34820, Beykoz, Istanbul, Turkey f Maritime Faculty, Istanbul Technical University Tuzla Campus, Istanbul, Turkey -
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HNjTflRCililD A NEWS BULLETIN published quarterly by the NEW ZEALAND ANTARCTIC SOCIETY (INC) Drillers on the Ross Ice Shelf last season used a new hot water system to penetrate fc. 416m of ice and gain access to the waters of the Ross Sea. Here the rig is at work on an access hole for a Norwegian science rproject. ' U . S . N a v y p h o t o Registered ol Post Office Headquarters, Vol. 8, No. 9. Wellington. New Zealand, as a magazine. SOUTH GEORGIA. •.. SOUTH SANDWICH Is' ,,r circle / SOUTH ORKNEY Is' \ $&?-""" "~~~^ / "^x AFAtKtANOis /^SiJS?UK*"0.V" ^Tl~ N^olazarevskayauss« SOUTH AMERICA / /\ ,f Borg°a ~7^1£^ ^.T, \60'E, /? cnirru „ / \ if sa / anT^^^Mo odezhnaya V/ x> SOUTH 9 .» /WEDDELL \ .'/ ' 0,X vr\uss.aT/>\ & SHETtAND-iSfV, / / Halley Bay*! DRONNING MAUD LAND ^im ^ >^ \ - / l s * S Y 2 < 'SEA/ S Euk A J COATSu k V ' tdC O A T S t d / L A N D ! > / \ Dfu^naya^^eneral Belgrano^RG y\ \ Mawson ANTARCTIC SrV MAC ROBERTSON LAND\ \ aust /PENINSULA'^ (see map below) Sobral arg / t Davis aust K- Siple ■■ [ U S A Amundsen-Scott / queen MARY LAND <JMirny AJELLSWORTH Vets') LAND °Vostok ussr MARIE BYRDNs? vice ShelA^ WIIKES tAND , ? O S S ^ . X V a n d a N z / SEA I JpY/VICTORIA .TERRE ,? ^ P o V t A N D V ^ / A D H J E j / V G E O R G E V L d , , _ / £ ^ . / ,^5s=:»iv-'s«,,y\ ^--Dumont d Urville france Leningradskaya \' / USSB_,^'' \ / -""*BALLENYIs\ / ANTARCTIC PENINSULA 1 Teniente Matienzo arg 2 Esperanza arg 3 Almirante Brown arg 4 Petrel arg 5 Decepcion arg.