DOCSLIB.ORG

Download Abstract Volume

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Download Abstract Volume Interdisciplinary Antarctic Earth Sciences Meeting Whidbey Island, Washington October 11-13, 2017 Agenda & Abstracts Wednesday 1:30-3:30 field trip of Whidbey Island Glacial Geology - walking along beach from Camp Casey 3:30-3:35 Welcome - opening remarks K. Licht 3:35-3:40 NSF update/information Doug Kowalewski 3:40-3:55 Antarctica is now the Best Mapped Continent Paul Morin and the Staff and Students of the Polar Geospatial Center 3:55-4:10 Progress toward a Rapid Access Ice Drill (RAID) for Jeff Severinghaus, John Goodge, Ryan Bay reconnaissance drilling of deep ice, bedrock, and borehole observatories on the Antarctic Plateau 4:10-5:30 Science communication Workshop John Meyer 5:30 Dinner Thursday 8:30-8:40 Licht - announcements 8:40-8:55 Upper mantle and transition zone seismic structure of Douglas A. Wiens, Andrew J. Lloyd, Hejun Zhu, Jeroen Antarctica and adjacent ocean basins from full waveform Tromp, Andrew Nyblade, Sridhar Anandakrishnan, adjoint tomography Richard Aster, Audrey Hierta, J. Paul Winberry, Teryy Wilson, Ian Dalziel, Samantha Hansen, Patrick Shore 9:00-9:20 INVITED: Continental arc initiation, magma fluxing, and Demian Nelson, John Cottle, Grahan Hagen-Peter termination recorded in Ross Orogen of Antarctica 9:25-9:40 Apatite and zircon double-dating thermochronologic Christine Kassab, Stuart Thomson, Kathy Licht constraints on the low temperature thermal history of the central Transantarctic Mountains 9:45-10:00 New Information on the theropod dinosaur Cryolophosaurus Nathan Smith, William Hammer, Peter Makovicky elloti from the Early Jurassic Hanson Formation of the Central Transantarctic Mountains 10:00-10:40 coffee break 10:40-10:55 Geohistory Drives the Evolution of Life History Traits and Byron Adams, Bishwo Adkhikari, Xia Xue, Breana Genome Architecture in Extant Terrestrial Microfauna Simmons, Becky Ball, Jeb Barrett, Diana Wall 11:00-11:15 Landscape Evolution of the Ice Free Areas Driven by Jaako Putkonen, Ted Bibby, Daniel Morgan, and Greg Uniquely Antarctic Processes Balco 11:20-11:40 INVITED: Multispectral Mapping of the Transantarctic Mark Salvatore Mountains: Key Geologic and Biologic Insights to Augment Traditional Field Investigations 11:45-12:00 The Polar Rock Repository: a resource for Antarctic earth Anne Grunow science 12:00-1:30 Lunch 1:30-1:45 A middle Pleistocene through middle Miocene moraine Allie Balter, Gordon Bromley, Greg Balco, Holly sequence in the central Transantarctic Mountains, Antarctica Thomas, Margaret Jackson 1:50-2:05 Subglacial chemical weathering in the Transantarctic Joseph Graly, Kathy Licht, Marc Caffee Mountains traced through meteoric 10Be 2:10-2:25 Dating of blue-ice sediments and implications for moraine Michael Kaplan, Kathy Licht, Gisela Winckler, Joerg formation, central Transantarctic Mountians Schaefer, Jennifer Lamp, Christine Kassab, Joseph Graly, Katrin Lindback 2:30-2:50 INVITED: Rapid early-Holocene deglaciation in the Ross Sea Perry Spector, John Stone, Seth Cowdery, Brenda Hall, Howard Conway, Gordon Bromley 2:55-3:15 INVITED: Geologic Influence on Ice Sheet Behavior: J. Paul Winberry, Howard Conway, Michelle Koutnik Insights from Active-Source Seismic Studies 3:15-3:45 coffee break 3:45-4:00 ALL poster introductions - lower level 4:00-5:00 Poster session 5:30 Dinner Friday 8:30-8:40 Licht - announcements 8:40-8:55 Ellsworth-Whitmore Mountains Crustal Block: Linking Ian W.D. Dalziel, Lawrence A. Lawcer, Ian O. Norton, Outcrop Geology to Deep Earth Processes Lisa M. Gahagan 9:00-9:15 Provenance fingerprints of Weddell Sea Embayment ice Kathy Licht, Liana Agrios, Trevor Williams, Sidney stream tills can be used to trace past ice flow paths Hemming, Ashley Cirone, Stefanie Brachfeld 9:20-9:35 Post-Last Glacial Maximum Thinning History of the Keir A. Nichols, Brent M. Goehring, Greg A. Balco, Foundation Ice Stream Adjacent to the Pensacola Mountains Claire Todd, Kathleen Huybers 9:40-10:00 INVITED: Subglacial Geology and Predictability of Slawek Tulaczyk Antarctic Ice Sheet Evolution 10:00-10:40 coffee break 10:40-10:55 Spatially variable geothermal heat flux in West Antarctica: Carolyn Branecky Begeman, Slawek M. Tulacyk, evidence and implications Andrew T. Fisher 11:00-11:20 INVITED: Lithospheric structure of west and central Weisen Shen, Douglas A. Wiens, Sridar Anandakrishnan, Antarctica and its tectonic implication Andrew Nyblade, Richard C. Aster, Peter Gerstoft, Peter Bromirski, Samantha Hansen, David Heeszel, Audrey Huerta, Terry Wilson, Paul Winberry, Ian Dalziel, Tim Stern, and Ralph Stephen 11:25-11:40 INVITED: ROSETTA-Ice Surveys - Exploring the Duality Kirsty Tinto, Christine Siddoway, Laurie Padman, Helen of the Ross Ice Shelf Fricker, Indrani Das, Dave Porter, Scott Springer, Robin Bell, and the ROSETTA-Ice Team 11:45-12:00 Temperature profiles along the Whillans Ice Stream Sarah Neuhaus, Scott Tyler, Kenneth Mankoff, Slawk measured using a Distributed Temperature Sensor Tulaczyk, Marion Bougamont, Poul Christoffersen 12:00-1:30 Lunch 1:30-1:45 Chemical weathering in Permafrost assessed using Nicolas Cuozzo, Ronals S. Sletten, Yan Hu, Fan0Zhen Magnesium Isotopes Teng 1:50-2:10 INVITED: Soil Phosphorous Availability Links the Ruth Heindel, Angela Spickard, Ross Virginia Geosphere and the Biosphere in the McMurdo Dry Valleys, Antarctica 2:15-2:30 Wind-Driven Rock Abrasion in the Ice-Free Valleys, Michael C. Malin, Bernard Hallet, Ronald S. Sletten Antarctica: Rates and Controls 2:35-2:50 Cryoturbation rates in an Antarctic volcanic terrain: Mark D. Kurz, Joshua Curtice, S.A. Soule, James preliminary results from Mount Morning Bockheim, William J. Jenkins 2:55-3:10 Origin of Ground Ice in Beacon Valley, Antarctica based on Ronald S. Sletten, Nicolas Cuozzo, Lu Liu, Bernard Paleoenvironmental Recronstruction utilizing Permafrost Hallet, John Stone, and Birgit Hagedorn Core 3:10-3:20 Announcements K. Licht 3:15-4:30 coffee + posters 4:00-5:00 discussion on future of deep field camps (optional) 5:30 Dinner Posters Patterned ice stream basal micro-seismicity reveals bedforms Grace Barcheck, Susan Schwartz, Slawek Tulaczyk Improved Glacier Area Estimate from Remote Sensing; Marie Bergelin and Douglas R. MacAyeal Case Study of Petermann Glacier Old ice in the Allan Hills Howard Conway, Laura Kehrl, Nick Holschuh, Seth Campbell, Nicole Spaulding, Andrei Kurbatov, Nelia Dunbar, William McIntosh Origin of rift-related alkaline magmatism in northwest Ross Kathryn Durkin, Kurt Panter, Paterno Castillo, Susan Sea, Antarctica Krans, Chad Deering, William McIntosh, John Valley, Kouki Kitajima, Phillip Kyle, Stanley Hart, Jerzy Blusztajin Hercules Dome: A deep ice core site for inferring past T.J. Fudge, Eric Steig, Knut Christianson stability of the West Antarctic ice sheet Insights into the evolution of the Antarctic Ice Sheet from Andrew Hein, David Sugden, John Woodward cosmogenic nuclide analysis in the Ellsworth Mountains Whichaway are the algae? Theresa Hudson, Kathy Licht Shallow ice radar expression of TAM glaciers within Ross Skye Keeshin, Robin Bell, Christine Siddoway, Gina Ice Shelf, and a new method to distinguish mechanisms of Jozef, Kirsty Tinto, Isabel Cordero, Nick Frearson, ice sheet thinning Indrani Das and ROSETTA-Ice Team Exposure dating of freshly exposed rock clasts in the Mt. Jennifer Lamp, Gisela Winckler, Joerg Schaefer, Michael Achernar blue-ice area Kaplan, Kathy Licht Investigating the Cause of Mantle Melting Beneath the Kurt Panter, Jenna Reindel, John Smellie, William Southernomst Volcanoes on Earth, Upper Scott Glacier, East McIntosh Antarctica The Antarctic Searc for Meteorites (ANSMET) after 40 years: John Schutt, James Karner, Ralph Harvey contributions to planetary materials research, the search for ancient ice, and the understanding of meteorite stranding surfaces Geology and crustal Structure underlying Ross Ice Shelf: Christine Siddoway, Kirsty Tinto, Robin E. Bell, Indrani New Perspectives from ROSETTA-Ice Project airborne Das, and ROSETTA-Ice Team investigations High-Resolution Body Wave Tomography of the Ross Sea Austin White-Gaynor, Andrew Nyblade, Douglas Wiens, Embayment, Antarctica Rick Aster, Peter Gerstoft, Peter Bromirski, Ralph Stephen Antarctica is now the Best Mapped Continent ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Morin, P. and the Staff and Students of the Polar Geospatial Center ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Department of Earth Sciences, University of Minnesota ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ In recent years we have seen a leap forward in geospatial imagery resources, sub-meter remote ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ sensing, open source software, and high performance computing. The Polar Geospatial Center ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (PGC) and the Antarctic science community have created a series of community-defined ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ products that are now becoming available. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The most notable of these datasets is the Reference Elevation Models of Antarctica (REMA) by ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ian Howat and M.J Noh of the Ohio State University. When complete, this mosaicked Digital ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Elevation Model (DEM) will have an 8m posting with a spherical accuracy of less than one ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ meter. In comparison, the DEM of most of the Western United States is at a 10m posting with ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2 less accuracy. Additionally, PGC is choosing
Load more

Recommended publications
  • University Microfilms, Inc., Ann Arbor, Michigan GEOLOGY of the SCOTT GLACIER and WISCONSIN RANGE AREAS, CENTRAL TRANSANTARCTIC MOUNTAINS, ANTARCTICA
    This dissertation has been /»OOAOO m icrofilm ed exactly as received MINSHEW, Jr., Velon Haywood, 1939- GEOLOGY OF THE SCOTT GLACIER AND WISCONSIN RANGE AREAS, CENTRAL TRANSANTARCTIC MOUNTAINS, ANTARCTICA. The Ohio State University, Ph.D., 1967 Geology University Microfilms, Inc., Ann Arbor, Michigan GEOLOGY OF THE SCOTT GLACIER AND WISCONSIN RANGE AREAS, CENTRAL TRANSANTARCTIC MOUNTAINS, ANTARCTICA DISSERTATION Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the Graduate School of The Ohio State University by Velon Haywood Minshew, Jr. B.S., M.S, The Ohio State University 1967 Approved by -Adviser Department of Geology ACKNOWLEDGMENTS This report covers two field seasons in the central Trans- antarctic Mountains, During this time, the Mt, Weaver field party consisted of: George Doumani, leader and paleontologist; Larry Lackey, field assistant; Courtney Skinner, field assistant. The Wisconsin Range party was composed of: Gunter Faure, leader and geochronologist; John Mercer, glacial geologist; John Murtaugh, igneous petrclogist; James Teller, field assistant; Courtney Skinner, field assistant; Harry Gair, visiting strati- grapher. The author served as a stratigrapher with both expedi­ tions . Various members of the staff of the Department of Geology, The Ohio State University, as well as some specialists from the outside were consulted in the laboratory studies for the pre­ paration of this report. Dr. George E. Moore supervised the petrographic work and critically reviewed the manuscript. Dr. J. M. Schopf examined the coal and plant fossils, and provided information concerning their age and environmental significance. Drs. Richard P. Goldthwait and Colin B. B. Bull spent time with the author discussing the late Paleozoic glacial deposits, and reviewed portions of the manuscript.
    [Show full text]
  • Dustin M. Schroeder
    Dustin M. Schroeder Assistant Professor of Geophysics Department of Geophysics, School of Earth, Energy, and Environmental Sciences 397 Panama Mall, Mitchell Building 361, Stanford University, Stanford, CA 94305 [email protected], 440.567.8343 EDUCATION 2014 Jackson School of Geosciences, University of Texas, Austin, TX Doctor of Philosophy (Ph.D.) in Geophysics 2007 Bucknell University, Lewisburg, PA Bachelor of Science in Electrical Engineering (B.S.E.E.), departmental honors, magna cum laude Bachelor of Arts (B.A.) in Physics, magna cum laude, minors in Mathematics and Philosophy PROFESSIONAL EXPERIENCE 2016 – present Assistant Professor of Geophysics, Stanford University 2017 – present Assistant Professor (by courtesy) of Electrical Engineering, Stanford University 2020 – present Center Fellow (by courtesy), Stanford Woods Institute for the Environment 2020 – present Faculty Affiliate, Stanford Institute for Human-Centered Artificial Intelligence 2021 – present Senior Member, Kavli Institute for Particle Astrophysics and Cosmology 2016 – 2020 Faculty Affiliate, Stanford Woods Institute for the Environment 2014 – 2016 Radar Systems Engineer, Jet Propulsion Laboratory, California Institute of Technology 2012 Graduate Researcher, Applied Physics Laboratory, Johns Hopkins University 2008 – 2014 Graduate Researcher, University of Texas Institute for Geophysics 2007 – 2008 Platform Hardware Engineer, Freescale Semiconductor SELECTED AWARDS 2021 Symposium Prize Paper Award, IEEE Geoscience and Remote Sensing Society 2020 Excellence in Teaching Award, Stanford School of Earth, Energy, and Environmental Sciences 2019 Senior Member, Institute of Electrical and Electronics Engineers 2018 CAREER Award, National Science Foundation 2018 LInC Fellow, Woods Institute, Stanford University 2016 Frederick E. Terman Fellow, Stanford University 2015 JPL Team Award, Europa Mission Instrument Proposal 2014 Best Graduate Student Paper, Jackson School of Geosciences 2014 National Science Olympiad Heart of Gold Award for Service to Science Education 2013 Best Ph.D.
    [Show full text]
  • Review of the Geology and Paleontology of the Ellsworth Mountains, Antarctica
    U.S. Geological Survey and The National Academies; USGS OF-2007-1047, Short Research Paper 107; doi:10.3133/of2007-1047.srp107 Review of the geology and paleontology of the Ellsworth Mountains, Antarctica G.F. Webers¹ and J.F. Splettstoesser² ¹Department of Geology, Macalester College, St. Paul, MN 55108, USA ([email protected]) ²P.O. Box 515, Waconia, MN 55387, USA ([email protected]) Abstract The geology of the Ellsworth Mountains has become known in detail only within the past 40-45 years, and the wealth of paleontologic information within the past 25 years. The mountains are an anomaly, structurally speaking, occurring at right angles to the Transantarctic Mountains, implying a crustal plate rotation to reach the present location. Paleontologic affinities with other parts of Gondwanaland are evident, with nearly 150 fossil species ranging in age from Early Cambrian to Permian, with the majority from the Heritage Range. Trilobites and mollusks comprise most of the fauna discovered and identified, including many new genera and species. A Glossopteris flora of Permian age provides a comparison with other Gondwana floras of similar age. The quartzitic rocks that form much of the Sentinel Range have been sculpted by glacial erosion into spectacular alpine topography, resulting in eight of the highest peaks in Antarctica. Citation: Webers, G.F., and J.F. Splettstoesser (2007), Review of the geology and paleontology of the Ellsworth Mountains, Antarctica, in Antarctica: A Keystone in a Changing World – Online Proceedings of the 10th ISAES, edited by A.K. Cooper and C.R. Raymond et al., USGS Open- File Report 2007-1047, Short Research Paper 107, 5 p.; doi:10.3133/of2007-1047.srp107 Introduction The Ellsworth Mountains are located in West Antarctica (Figure 1) with dimensions of approximately 350 km long and 80 km wide.
    [Show full text]
  • Air and Shipborne Magnetic Surveys of the Antarctic Into the 21St Century
    TECTO-125389; No of Pages 10 Tectonophysics xxx (2012) xxx–xxx Contents lists available at SciVerse ScienceDirect Tectonophysics journal homepage: www.elsevier.com/locate/tecto Air and shipborne magnetic surveys of the Antarctic into the 21st century A. Golynsky a,⁎,R.Bellb,1, D. Blankenship c,2,D.Damasked,3,F.Ferracciolie,4,C.Finnf,5,D.Golynskya,6, S. Ivanov g,7,W.Jokath,8,V.Masolovg,6,S.Riedelh,7,R.vonFresei,9,D.Youngc,2 and ADMAP Working Group a VNIIOkeangeologia, 1, Angliysky Avenue, St.-Petersburg, 190121, Russia b LDEO of Columbia University, 61, Route 9W, PO Box 1000, Palisades, NY 10964-8000, USA c University of Texas, Institute for Geophysics, 4412 Spicewood Springs Rd., Bldg. 600, Austin, Texas 78759-4445, USA d BGR, Stilleweg 2 D-30655, Hannover, Germany e BAS, High Cross, Madingley Road, Cambridge, CB3 OET, UK f USGS, Denver Federal Center, Box 25046 Denver, CO 80255, USA g PMGE, 24, Pobeda St., Lomonosov, 189510, Russia h AWI, Columbusstrasse, 27568, Bremerhaven, Germany i School of Earth Sciences, The Ohio State University, 125 S. Oval Mall, Columbus, OH, 43210, USA article info abstract Article history: The Antarctic geomagnetics' community remains very active in crustal anomaly mapping. More than 1.5 million Received 1 August 2011 line-km of new air- and shipborne data have been acquired over the past decade by the international community Received in revised form 27 January 2012 in Antarctica. These new data together with surveys that previously were not in the public domain significantly Accepted 13 February 2012 upgrade the ADMAP compilation.
    [Show full text]
  • Englacial Architecture and Age‐Depth Constraints Across 10.1029/2019GL086663 the West Antarctic Ice Sheet Key Points: David W
    RESEARCH LETTER Englacial Architecture and Age‐Depth Constraints Across 10.1029/2019GL086663 the West Antarctic Ice Sheet Key Points: David W. Ashmore1 , Robert G. Bingham2 , Neil Ross3 , Martin J. Siegert4 , • We measure and date individual 5 1 isochronal radar internal reflection Tom A. Jordan , and Douglas W. F. Mair horizons across the Weddell Sea 1 2 sector of the West Antarctic Ice School of Environmental Sciences, University of Liverpool, Liverpool, UK, School of GeoSciences, University of Sheet Edinburgh, Edinburgh, UK, 3School of Geography, Politics and Sociology, Newcastle University, Newcastle upon Tyne, • – – Horizons dated to 1.9 3.2, 3.5 6.0, UK, 4Grantham Institute and Department of Earth Science and Engineering, Imperial College London, London, UK, and 4.6–8.1 ka are widespread and 5British Antarctic Survey, Cambridge, UK linked to previous radar surveys of the Ross and Amundsen Sea sectors • These form the basis for a wider database of ice sheet architecture for Abstract The englacial stratigraphic architecture of internal reflection horizons (IRHs) as imaged by validating and calibrating ice sheet ice‐penetrating radar (IPR) across ice sheets reflects the cumulative effects of surface mass balance, basal models of West Antarctica melt, and ice flow. IRHs, considered isochrones, have typically been traced in interior, slow‐flowing regions. Here, we identify three distinctive IRHs spanning the Institute and Möller catchments that cover 50% of Supporting Information: • Supporting Information S1 West Antarctica's Weddell Sea Sector and are characterized by a complex system of ice stream tributaries. We place age constraints on IRHs through their intersections with previous geophysical surveys tied to Byrd Ice Core and by age‐depth modeling.
    [Show full text]
  • The Commonwealth Trans-Antarctic Expedition 1955-1958
    THE COMMONWEALTH TRANS-ANTARCTIC EXPEDITION 1955-1958 HOW THE CROSSING OF ANTARCTICA MOVED NEW ZEALAND TO RECOGNISE ITS ANTARCTIC HERITAGE AND TAKE AN EQUAL PLACE AMONG ANTARCTIC NATIONS A thesis submitted in fulfilment of the requirements for the Degree PhD - Doctor of Philosophy (Antarctic Studies – History) University of Canterbury Gateway Antarctica Stephen Walter Hicks 2015 Statement of Authority & Originality I certify that the work in this thesis has not been previously submitted for a degree nor has it been submitted as part of requirements for a degree except as fully acknowledged within the text. I also certify that the thesis has been written by me. Any help that I have received in my research and the preparation of the thesis itself has been acknowledged. In addition, I certify that all information sources and literature used are indicated in the thesis. Elements of material covered in Chapter 4 and 5 have been published in: Electronic version: Stephen Hicks, Bryan Storey, Philippa Mein-Smith, ‘Against All Odds: the birth of the Commonwealth Trans-Antarctic Expedition, 1955-1958’, Polar Record, Volume00,(0), pp.1-12, (2011), Cambridge University Press, 2011. Print version: Stephen Hicks, Bryan Storey, Philippa Mein-Smith, ‘Against All Odds: the birth of the Commonwealth Trans-Antarctic Expedition, 1955-1958’, Polar Record, Volume 49, Issue 1, pp. 50-61, Cambridge University Press, 2013 Signature of Candidate ________________________________ Table of Contents Foreword ..................................................................................................................................
    [Show full text]
  • 2006-2007 Science Planning Summaries
    Project Indexes Find information about projects approved for the 2006-2007 USAP field season using the available indexes. Project Web Sites Find more information about 2006-2007 USAP projects by viewing project web sites. More Information Additional information pertaining to the 2006-2007 Field Season. Home Page Station Schedules Air Operations Staffed Field Camps Event Numbering System 2006-2007 USAP Field Season Project Indexes Project Indexes Find information about projects approved for the 2006-2007 USAP field season using the USAP Program Indexes available indexes. Aeronomy and Astrophysics Dr. Bernard Lettau, Program Director (acting) Project Web Sites Biology and Medicine Dr. Roberta Marinelli, Program Director Find more information about 2006-2007 USAP projects by Geology and Geophysics viewing project web sites. Dr. Thomas Wagner, Program Director Glaciology Dr. Julie Palais, Program Director More Information Ocean and Climate Systems Additional information pertaining Dr. Bernhard Lettau, Program Director to the 2006-2007 Field Season. Artists and Writers Home Page Ms. Kim Silverman, Program Director Station Schedules USAP Station and Vessel Indexes Air Operations Staffed Field Camps Amundsen-Scott South Pole Station Event Numbering System McMurdo Station Palmer Station RVIB Nathaniel B. Palmer ARSV Laurence M. Gould Special Projects Principal Investigator Index Deploying Team Members Index Institution Index Event Number Index Technical Event Index Project Web Sites 2006-2007 USAP Field Season Project Indexes Project Indexes Find information about projects approved for the 2006-2007 USAP field season using the Project Web Sites available indexes. Principal Investigator/Link Event No. Project Title Aghion, Anne W-218-M Works and days: An antarctic Project Web Sites chronicle Find more information about 2006-2007 USAP projects by Ainley, David B-031-M Adélie penguin response to viewing project web sites.
    [Show full text]
  • The Origin and Early Evolution of Dinosaurs
    Biol. Rev. (2010), 85, pp. 55–110. 55 doi:10.1111/j.1469-185X.2009.00094.x The origin and early evolution of dinosaurs Max C. Langer1∗,MartinD.Ezcurra2, Jonathas S. Bittencourt1 and Fernando E. Novas2,3 1Departamento de Biologia, FFCLRP, Universidade de S˜ao Paulo; Av. Bandeirantes 3900, Ribeir˜ao Preto-SP, Brazil 2Laboratorio de Anatomia Comparada y Evoluci´on de los Vertebrados, Museo Argentino de Ciencias Naturales ‘‘Bernardino Rivadavia’’, Avda. Angel Gallardo 470, Cdad. de Buenos Aires, Argentina 3CONICET (Consejo Nacional de Investigaciones Cient´ıficas y T´ecnicas); Avda. Rivadavia 1917 - Cdad. de Buenos Aires, Argentina (Received 28 November 2008; revised 09 July 2009; accepted 14 July 2009) ABSTRACT The oldest unequivocal records of Dinosauria were unearthed from Late Triassic rocks (approximately 230 Ma) accumulated over extensional rift basins in southwestern Pangea. The better known of these are Herrerasaurus ischigualastensis, Pisanosaurus mertii, Eoraptor lunensis,andPanphagia protos from the Ischigualasto Formation, Argentina, and Staurikosaurus pricei and Saturnalia tupiniquim from the Santa Maria Formation, Brazil. No uncontroversial dinosaur body fossils are known from older strata, but the Middle Triassic origin of the lineage may be inferred from both the footprint record and its sister-group relation to Ladinian basal dinosauromorphs. These include the typical Marasuchus lilloensis, more basal forms such as Lagerpeton and Dromomeron, as well as silesaurids: a possibly monophyletic group composed of Mid-Late Triassic forms that may represent immediate sister taxa to dinosaurs. The first phylogenetic definition to fit the current understanding of Dinosauria as a node-based taxon solely composed of mutually exclusive Saurischia and Ornithischia was given as ‘‘all descendants of the most recent common ancestor of birds and Triceratops’’.
    [Show full text]
  • The Sauropodomorph Biostratigraphy of the Elliot Formation of Southern Africa: Tracking the Evolution of Sauropodomorpha Across the Triassic–Jurassic Boundary
    Editors' choice The sauropodomorph biostratigraphy of the Elliot Formation of southern Africa: Tracking the evolution of Sauropodomorpha across the Triassic–Jurassic boundary BLAIR W. MCPHEE, EMESE M. BORDY, LARA SCISCIO, and JONAH N. CHOINIERE McPhee, B.W., Bordy, E.M., Sciscio, L., and Choiniere, J.N. 2017. The sauropodomorph biostratigraphy of the Elliot Formation of southern Africa: Tracking the evolution of Sauropodomorpha across the Triassic–Jurassic boundary. Acta Palaeontologica Polonica 62 (3): 441–465. The latest Triassic is notable for coinciding with the dramatic decline of many previously dominant groups, followed by the rapid radiation of Dinosauria in the Early Jurassic. Among the most common terrestrial vertebrates from this time, sauropodomorph dinosaurs provide an important insight into the changing dynamics of the biota across the Triassic–Jurassic boundary. The Elliot Formation of South Africa and Lesotho preserves the richest assemblage of sauropodomorphs known from this age, and is a key index assemblage for biostratigraphic correlations with other simi- larly-aged global terrestrial deposits. Past assessments of Elliot Formation biostratigraphy were hampered by an overly simplistic biozonation scheme which divided it into a lower “Euskelosaurus” Range Zone and an upper Massospondylus Range Zone. Here we revise the zonation of the Elliot Formation by: (i) synthesizing the last three decades’ worth of fossil discoveries, taxonomic revision, and lithostratigraphic investigation; and (ii) systematically reappraising the strati- graphic provenance of important fossil locations. We then use our revised stratigraphic information in conjunction with phylogenetic character data to assess morphological disparity between Late Triassic and Early Jurassic sauropodomorph taxa. Our results demonstrate that the Early Jurassic upper Elliot Formation is considerably more taxonomically and morphologically diverse than previously thought.
    [Show full text]
  • Nudlerical Dlodelling of a Fast-Flowing Outlet Glacier: Experidlents with Different Basal Conditions
    .1n/lal.r oJ GlaciologJ' 23 1996 (' Internatio na l G laciological Society NUDlerical Dlodelling of a fast-flowing outlet glacier: experiDlents with different basal conditions FR:-\;'-JK P ,\TTYi\ De/Jar/lllen / of G eograjJ/~) I . "rije ['"il'eni/eil Brum/, B-1050 Bumel, BelgiulII A BSTRACT, R ecent o iJse J'\'ati o ns in Shirase Dra in age Basin, Enderb\' L a nd, Anta rcti ca, sholl' tha t the ice sheet is thinning a t the consid(: ra ble ra te of 0,5 (,0 m ai, S urface \'clocities in the stream a rea read; m ore tha n 2000 m ai, making S hirasc G lacier one of the fas test-fl o\l'ing glaciers in East Anta rcti ca, .\ numeri cal im'esti ga ti on of the pITSe nt stress fi eld in S hirase G lacier sholl's the existence of a large tra nsition zone 200 km in leng th w here bOlh shea ring a nd stretching a rc of equal im porta nce, fo ll owed b y a slI Tam zone 0(' a pproxima tely 50 km , \I'here stretchill g is the m ajor deform a ti o n process, In o rder to imprO\ 'e insig ht into the preselll tra nsient beha\'iour of the ice-sheet sys tem , a t\\'o-dimensiona ltime-dependent fl o\l'line model has been d e\'e loped, taking into account the ice-stream m echa ni cs, Bo th bedrock adj ustment a n cl ice tempera ture a re ta ken into ac('oulll a nd the templ'I'a lU re field is full y coupled to the ice-shcet \'C locit)' fiel d, Experiments were carried o ut \\'ith dilTerent basal m o ti o n conditio ns in order to understa nd their influen ce o n the cl\'na mic beha\'io ur of th e ice sheet a nd the stream a rea in pa rticul a r.
    [Show full text]
  • 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
    [Show full text]
  • West Antarctica: Tectonics and Paleogeography
    Chapter 2 West Antarctica: Tectonics and Paleogeography The origin of West Antarctica (WANT) can be traced back to the Terra Australis orogenesis that began between 520 Ma and 510 Ma—shortly after the terminal suturing of Gondwana (Boger 2011). The onset of this event was responsible for the termination of passive margin sedimentation along much of the Pacific margin of Gondwana and marks the beginning of widespread and broadly coeval deforma- tion and arc-type plutonism. It also began a long-lived process of accretion that added much of the crust that defines eastern Australia, West Antarctica (domain 5 of Boger 2011, Fig. 2.1), and western South America (Cawood 2005, 2009). Post-Gondwana accretionary growth—the Terra Australis and Gondwanide Orogenies—The suturing of the West Gondwana and Australo–Antarctic plates along the Kuunga Orogen brought to an end the long-lived process of convergence between the pre-collision components of Gondwana. The result was a reconfigura- tion of the early to middle Cambrian plate system and the consequent transfer of ocean floor consumption from between the pre-Gondwana cratons to the outboard Pacific margin of newly formed Gondwana supercontinent (Cawood2005 ). This led to the establishment of the accretionary Terra Austrais Orogen (Cawood 2005), a general name given to the orogenic belt that stretched continuously from north- ern South America to northern Australia and which began in the early to middle Cambrian and lasted until the late Carboniferous. In Antarctica Terra Australis (Ross) orogenesis also deformed and variably metamorphosed the pre-Gondwana passive margin (Fig. 2.2). The Gondwana supercontinent underwent a sequential fragmentation over approximately 165 Ma.
    [Show full text]