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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 -
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. -
Glacial Geomorphology of the Pensacola Mountains, Weddell Sea
Glacial Geomorphology of the Pensacola Mountains, Weddell Sea Sector, Antarctica 1 1 1 2 3 4 5 3 Matthew Hegland , Michael Vermeulen , Claire Todd , Greg Balco , Kathleen Huybers , Seth Campbell , Chris Simmons , Howard Conway (1) Department of Geosciences, Pacific Lutheran University, Tacoma, WA 98447, (2) Berkeley Geochronology Center, 2455 Ridge Road, Berkeley, CA 94709, (3) Department of Earth and Space Sciences, University of Washington, Seattle, WA 98195, (4) Climate Change Institute, University of Maine, Orono, ME 04469, (5) Pro Guiding Service, Seattle, WA 98045 Abstract We mapped glacial geologic features in the Thomas, Schmidt, and Williams Hills in the western Pensacola Mountains (Figure 1). The three nunatak ranges are adjacent to Foundation Ice Stream (FIS), which drains ice from the East and West Antarctic Ice Sheets (EAIS and WAIS), into the Filchner-Ronne Ice Shelf. Glacial deposits in the Pensacola Mountains record changes in the thickness of FIS and provide insight into ice sheet history. Glacial striations oriented transverse to topography on nunatak summits indicate (a) the presence of warm-based ice (b) that ice was thick enough to flow unconstrained over topography, and (c) suggest increased contribution from the EAIS. Preserved deposits with varying weathering extents indicate multiple periods of advance of cold-based ice. Preliminary numerical modeling of ice surfaces in the Thomas Hills suggest elevation changes could be attributed to local variations in ablation in addition to surface elevation changes in FIS. Results GEOMORPHIC FEATURES ON EXPOSED NUNATAKS Schmidt and Williams Hills (Figures 2,3, and 4): • Depositional landforms are sparse with occasional highly weathered erratics found over 100 m above the modern ice surface and relatively unweathered erratics deposited beside them below 100 m. -
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. -
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 -
Mid-Holocene Pulse of Thinning in the Weddell Sea Sector of the West Antarctic Ice Sheet
ARTICLE Received 9 Feb 2016 | Accepted 9 Jul 2016 | Published 22 Aug 2016 DOI: 10.1038/ncomms12511 OPEN Mid-Holocene pulse of thinning in the Weddell Sea sector of the West Antarctic ice sheet Andrew S. Hein1, Shasta M. Marrero1, John Woodward2, Stuart A. Dunning2,3, Kate Winter2, Matthew J. Westoby2, Stewart P.H.T. Freeman4, Richard P. Shanks4 & David E. Sugden1 Establishing the trajectory of thinning of the West Antarctic ice sheet (WAIS) since the last glacial maximum (LGM) is important for addressing questions concerning ice sheet (in)stability and changes in global sea level. Here we present detailed geomorphological and cosmogenic nuclide data from the southern Ellsworth Mountains in the heart of the Weddell Sea embayment that suggest the ice sheet, nourished by increased snowfall until the early Holocene, was close to its LGM thickness at 10 ka. A pulse of rapid thinning caused the ice elevation to fall B400 m to the present level at 6.5–3.5 ka, and could have contributed 1.4–2 m to global sea-level rise. These results imply that the Weddell Sea sector of the WAIS contributed little to late-glacial pulses in sea-level rise but was involved in mid-Holocene rises. The stepped decline is argued to reflect marine downdraw triggered by grounding line retreat into Hercules Inlet. 1 School of GeoSciences, University of Edinburgh, Drummond Street, Edinburgh EH8 9XP, UK. 2 Department of Geography, Northumbria University, Ellison Place, Newcastle upon Tyne NE1 8ST, UK. 3 School of Geography, Politics and Sociology, Newcastle University, Newcastle upon Tyne NE1 7RU, UK. -
Mem170-Bm.Pdf by Guest on 30 September 2021 452 Index
Index [Italic page numbers indicate major references] acacamite, 437 anticlines, 21, 385 Bathyholcus sp., 135, 136, 137, 150 Acanthagnostus, 108 anticlinorium, 33, 377, 385, 396 Bathyuriscus, 113 accretion, 371 Antispira, 201 manchuriensis, 110 Acmarhachis sp., 133 apatite, 74, 298 Battus sp., 105, 107 Acrotretidae, 252 Aphelaspidinae, 140, 142 Bavaria, 72 actinolite, 13, 298, 299, 335, 336, 339, aphelaspidinids, 130 Beacon Supergroup, 33 346 Aphelaspis sp., 128, 130, 131, 132, Beardmore Glacier, 429 Actinopteris bengalensis, 288 140, 141, 142, 144, 145, 155, 168 beaverite, 440 Africa, southern, 52, 63, 72, 77, 402 Apoptopegma, 206, 207 bedrock, 4, 58, 296, 412, 416, 422, aggregates, 12, 342 craddocki sp., 185, 186, 206, 207, 429, 434, 440 Agnostidae, 104, 105, 109, 116, 122, 208, 210, 244 Bellingsella, 255 131, 132, 133 Appalachian Basin, 71 Bergeronites sp., 112 Angostinae, 130 Appalachian Province, 276 Bicyathus, 281 Agnostoidea, 105 Appalachian metamorphic belt, 343 Billingsella sp., 255, 256, 264 Agnostus, 131 aragonite, 438 Billingsia saratogensis, 201 cyclopyge, 133 Arberiella, 288 Bingham Peak, 86, 129, 185, 190, 194, e genus, 105 Archaeocyathidae, 5, 14, 86, 89, 104, 195, 204, 205, 244 nudus marginata, 105 128, 249, 257, 281 biogeography, 275 parvifrons, 106 Archaeocyathinae, 258 biomicrite, 13, 18 pisiformis, 131, 141 Archaeocyathus, 279, 280, 281, 283 biosparite, 18, 86 pisiformis obesus, 131 Archaeogastropoda, 199 biostratigraphy, 130, 275 punctuosus, 107 Archaeopharetra sp., 281 biotite, 14, 74, 300, 347 repandus, 108 Archaeophialia, -
Geologic Map of the Davis Valley Quadrangle and Part of the Cordiner Peaks Quadrangle, Pensacola Mountains, Antarctica
-0 DEPARTMENT OF THE INTERIOR UNITED STATES GEOLOGICAL SURVEY GEOLOGIC MAP OF THE DAVIS VALLEY QUADRANGLE AND PART OF THE CORDINER PEAKS QUADRANGLE, PENSACOLA MOUNTAINS, ANTARCTICA By Arthur B. Ford, Dwight L. Schmidt, and Walter W. Boyd, Jr. Prepared by the U.S. GEOLOGICAL SURVEY under the auspices of the NATIONAL SCIENCE FOUNDATION -N V'l 0 0 0 0 U.S. ANTARCTIC RESEARCH PROGRAM MAP Published by the U.S. Geological Survey, 1978 G GEOLOGIC MAP SYMBOLS COMMONLY USED ON MAPS OF THE UNITED STATES GEOLOGICAL SURVEY (Special symbols are shown in explanation) Contact-Dashed where approximately Strike and dip of beds-Ball indicates located; short dashed where inferred; top of beds known from sedimentary dotted where concealed structures _1!_ Inclined EB Horizontal Contact-Showing dip; well exposed at -+- Vertical Overturned triangle -..J!. Strike and dip of foliation Fault-Dashed where approximately located; short dashed where inferred; ~ Inclined -+·Vertical +Horizontal dotted where concealed Strike and dip of cleavage Fault, showing dip-Ball and bar on ~ Inclined ~Vertical +Horizontal downthrown side Bearing and plunge of lineation Normal fault-Hachured on down '~Inclined • Vertical - Horizontal thrown side Strike and dip of joints Fault-Showing relative horizontal -~ Inclined --Vertical +Horizontal movement Note: Planar symbols (strike and dip + + + + + + Thrust fault-Sawteeth on upper plate of beds, foliation or schistosity, and cleav age) may be combined with linear symbols to record data observed at ~ Anticline-Showing direction of plunge; same locality by superimposed symbols dashed where approximately located; at point of observation. Coexisting dotted where concealed planar symbols are shown intersecting at point of observation. -
The Million-Year Evolution of the Glacial Trimline in the Southernmost Ellsworth Mountains, Antarctica
Edinburgh Research Explorer The million-year evolution of the glacial trimline in the southernmost Ellsworth Mountains, Antarctica Citation for published version: Sugden, D, Hein, A, Woodward, J, Marrero, S, Rodes, A, Dunning, S, Freeman, S, Winter, K & Westoby, M 2017, 'The million-year evolution of the glacial trimline in the southernmost Ellsworth Mountains, Antarctica', Earth and Planetary Science Letters, vol. 469, pp. 42-52. https://doi.org/10.1016/j.epsl.2017.04.006 Digital Object Identifier (DOI): 10.1016/j.epsl.2017.04.006 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 Publisher Rights Statement: © 2017 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license 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: 11. Oct. 2021 Earth and Planetary Science Letters 469 (2017) 42–52 Contents lists available at ScienceDirect Earth and Planetary Science Letters www.elsevier.com/locate/epsl The million-year evolution of the glacial trimline in the southernmost Ellsworth Mountains, Antarctica ∗ David E. -
Geological Studies of the Dufek Intrusion, Pensacola Mountains
study of the Pensacola Mountains, for much helpful discus- was established at the LC-130 ski-plane landing site near sion of the geologic relations here reported. Walker Peak, from which motor toboggan and ski traverses This research is supported by National Science Founda- were made to sites of investigations. The massif and nearby tion interagency agreement DDP 76-21663 with the nunataks are underlain by layered mafic igneous rocks of Geologic Division, U.S. Geological Survey. cumulus origin that make up the lower part of the Dufek intrusion, a Jurassic stratiform complex of immense size in the northern third of the Pensacola Mountains. References The U.S. Geological Survey (USGS) made reconnaissance studies using Army helicopters of all outcropping parts of the intrusion in the summer 1965-1966. This work showed Clarkson, P.D. 1972. Geology of the Shackleton Range: a that all of the Forrestal Range, located about 50 kilometers preliminary report. British Antarctic Survey Bulletin, 31: 1-15. southeast of Dufek Massif, is also underlain by part—the Craddock, Campbell. 1970. Tectonic map of Antarctica. Antarctic iron-enriched upper part - of the Dufek intrusion (Ford and Map Folio Series, 12: plate XXI. Boyd, 1968), and that the body probably has an area of at Ford, A.B. 1972. The Weddell orogeny—latest Permian to early least 24,000 square kilometers (Behrendt et al., 1974). As Mesozoic deformation at the Weddell Sea margin of the Trans. the thickness is estimated to be on the order of 8 to 9 antarctic Mountains. In: Antarctic Geology and Geophysics kilometers (Ford, 1976), the original magma volume may (Adie, R.J., editor). -
2010-2011 Science Planning Summaries
Find information about current Link to project web sites and USAP projects using the find information about the principal investigator, event research and people involved. number station, and other indexes. Science Program Indexes: 2010-2011 Find information about current USAP projects using the Project Web Sites principal investigator, event number station, and other Principal Investigator Index indexes. USAP Program Indexes Aeronomy and Astrophysics Dr. Vladimir Papitashvili, program manager Organisms and Ecosystems Find more information about USAP projects by viewing Dr. Roberta Marinelli, program manager individual project web sites. Earth Sciences Dr. Alexandra Isern, program manager Glaciology 2010-2011 Field Season Dr. Julie Palais, program manager Other Information: Ocean and Atmospheric Sciences Dr. Peter Milne, program manager Home Page Artists and Writers Peter West, program manager Station Schedules International Polar Year (IPY) Education and Outreach Air Operations Renee D. Crain, program manager Valentine Kass, program manager Staffed Field Camps Sandra Welch, program manager Event Numbering System Integrated System Science Dr. Lisa Clough, program manager Institution Index USAP Station and Ship Indexes Amundsen-Scott South Pole Station McMurdo Station Palmer Station RVIB Nathaniel B. Palmer ARSV Laurence M. Gould Special Projects ODEN Icebreaker Event Number Index Technical Event Index Deploying Team Members Index Project Web Sites: 2010-2011 Find information about current USAP projects using the Principal Investigator Event No. Project Title principal investigator, event number station, and other indexes. Ainley, David B-031-M Adelie Penguin response to climate change at the individual, colony and metapopulation levels Amsler, Charles B-022-P Collaborative Research: The Find more information about chemical ecology of shallow- USAP projects by viewing individual project web sites. -
Geology of the Northern Pensacola Mountains and Adjacent Areas
Geology of the Northern Pensacola Ice Shelf. The age of the body is uncertain, but a post-Permian age is indicated by the metamorphic Mountains and Adjacent Areas effects on nearby carbonaceous, Glossopteris-bear- ing, sedimentary rocks. DWIGHT L. SCHMIDT and A. B. FORD Three areas outside of the Pensacola Mountains, U. S. Geological Survey not previously visited by man, were mapped. A group of nunataks, 120 kilometers (75 miles) south- The northern Pensacola Mountains are composed west of the Neptune Range, consists of intensely of folded sedimentary rocks and stratiform gabbroic folded, rhythmically interbedded graywacke and rock. About half of the northern Pensacolas con- slate (Patuxent Formation) of Precambrian age and sists of folded, interbedded graywacke and slate folded quartz sandstone that unconformably over- (Patuxent Formation) of Precambrian age that is lies the graywacke. The Mount Ferrara area, 95 unconformably overlain by folded limestone (Nelson kilometers (60 miles) east of the Forrestal Range, Limestone), volcanic rocks, and shale of Cambrian consists of folded Nelson Limestone containing age. This, in turn, is unconformably overlain by abundant arch acocyathids. The Mount Spann area, folded sandstone of middle Paleozoic age (Schmidt 120 kilometers (75 miles) northeast of the Forrestal et al., 1965). A gentle regional plunge to the north Range, consists of interbedded, metasedimentary results in prominent outcrops of pebbly mudstone quartzite and siltstone that probably underlies the (Gale Mudstone) of Permian (?) age and overlaying Cambrian Nelson Limestone and is probably much coal- and Glossopteris-bearing siltstone and shale of thicker than the estimated 1,000 meters (3,300 feet) Permian age.