2015 Official Guide of the Big Wild Life Runs
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The Cordilleran Ice Sheet 3 4 Derek B
1 2 The cordilleran ice sheet 3 4 Derek B. Booth1, Kathy Goetz Troost1, John J. Clague2 and Richard B. Waitt3 5 6 1 Departments of Civil & Environmental Engineering and Earth & Space Sciences, University of Washington, 7 Box 352700, Seattle, WA 98195, USA (206)543-7923 Fax (206)685-3836. 8 2 Department of Earth Sciences, Simon Fraser University, Burnaby, British Columbia, Canada 9 3 U.S. Geological Survey, Cascade Volcano Observatory, Vancouver, WA, USA 10 11 12 Introduction techniques yield crude but consistent chronologies of local 13 and regional sequences of alternating glacial and nonglacial 14 The Cordilleran ice sheet, the smaller of two great continental deposits. These dates secure correlations of many widely 15 ice sheets that covered North America during Quaternary scattered exposures of lithologically similar deposits and 16 glacial periods, extended from the mountains of coastal south show clear differences among others. 17 and southeast Alaska, along the Coast Mountains of British Besides improvements in geochronology and paleoenvi- 18 Columbia, and into northern Washington and northwestern ronmental reconstruction (i.e. glacial geology), glaciology 19 Montana (Fig. 1). To the west its extent would have been provides quantitative tools for reconstructing and analyzing 20 limited by declining topography and the Pacific Ocean; to the any ice sheet with geologic data to constrain its physical form 21 east, it likely coalesced at times with the western margin of and history. Parts of the Cordilleran ice sheet, especially 22 the Laurentide ice sheet to form a continuous ice sheet over its southwestern margin during the last glaciation, are well 23 4,000 km wide. -
Explorer's Gazette
EEXXPPLLOORREERR’’SS GAZETTE GAZETTE Published Quarterly in Pensacola, Florida USA for the Old Antarctic Explorers Association Uniting All OAEs in Perpetuating the Memory of United States Involvement in Antarctica Volume 13, Issue 2 Old Antarctic Explorers Association, Inc Apr-Jun 2013 —Photo by Elaine Hood/NSF Brandon “Shaggy” Neahusan explains the vision for rebuilding McMurdo Station over the next 15 years. Antarctic Deep Freeze Association Reunion New Orleans 2013 by Elaine Hood working in McMurdo was the last year the Navy was there, Easy Fun in the Big Easy 1998. I’ve been a member of ADFA since learning about its existence almost ten years ago. I have not missed an ADFA The Big Easy, New Orleans, was the destination of dozens reunion since my first one and always look forward to seeing of Deep Freeze veterans June 18–21. And the living was familiar faces and laughing at good stories. easy due to the prime location of the Hyatt Hotel in the French Quarter, as it was located right on Bourbon Street. Reunion The nightlife on Bourbon Street never stops and it is always Bill Stroup and his son Robert were our hosts for the worth a walk just to see what trouble you need to stay away biennial Antarctic Deep Freeze Association reunion. Robert from. kept the bar well stocked in the hospitality room that always My name is Elaine Hood and I work for the civilian serves as the central meeting point. contractor to the US Antarctic Program. My first year Continued on page 4. E X P L O R E R ‘ S G A Z E T T E V O L U M E 13, I S S U E 2 A P R J U N 2 0 1 3 P R E S I D E N T ’ S C O R N E R Laura Snow—OAEA President FELLOW OAEA MEMBERS: In this first letter to you from the President’s Corner I am providing you with information regarding recent decisions by the board of directors. -
Relict Non-Glacial Surfaces and Autochthonous Blockfields in the Northern Swedish Mountains
Relict Non-Glacial Surfaces and Autochthonous Blockfields in the Northern Swedish Mountains Bradley W. Goodfellow Doctoral Dissertation 2008 Department of Physical Geography and Quaternary Geology Stockholm University © Bradley W. Goodfellow ISSN: 1653-7211 ISBN: 978-91-7155-620-2 Paper I © Elsevier Paper II © Elsevier Layout: Bradley W. Goodfellow (except for Papers I and II) Cover photo: View of relict non-glacial surfaces, looking SE from the blockfield-mantled Tarfalatjårro summit, northern Swedish mountains (Bradley Goodfellow, August 2006) Printed in Sweden by PrintCenter US-AB 1 Abstract Relict non-glacial surfaces occur in many formerly glaciated landscapes, where they represent areas that have escaped significant glacial modification. Frequently distinguished by blockfield mantles, relict non- glacial surfaces are important archives of long-term weathering and landscape evolution processes. The aim of this thesis is to examine the distribution, weathering, ages, and formation of relict non-glacial surfaces in the northern Swedish mountains. Mapping of surfaces from aerial photographs and analysis in a GIS revealed five types of relict non-glacial surfaces that reflect differences in surface process types or rates according to elevation, gradient, and bedrock lithology. Clast characteristics and fine matrix granulometry, chemistry, and mineralogy reveal minimal chemical weathering of the blockfields. Terrestrial cosmogenic nuclides were measured in quartz samples from two blockfield-mantled summits and a numerical ice sheet model was applied to account for periods of surface burial beneath ice sheets and nuclide production rate changes attributable to glacial isostasy. Total surface histories for each summit are almost certainly, but not unequivocally, confined to the Quaternary. Maximum modelled erosion rates are as low as 4.0 mm kyr-1, which is likely to be near the low extreme for relict non-glacial surfaces in this landscape. -
Origin of Paleovalleys on the Rio Grande Do Sul Shield (Brazil)
Palaeogeography, Palaeoclimatology, Palaeoecology xxx (xxxx) xxx–xxx Contents lists available at ScienceDirect Palaeogeography, Palaeoclimatology, Palaeoecology journal homepage: www.elsevier.com/locate/palaeo Origin of paleovalleys on the Rio Grande do Sul Shield (Brazil): Implications for the extent of late Paleozoic glaciation in west-central Gondwana ⁎ Nicholas D. Fedorchuka, , John L. Isbella, Neil P. Griffisb, Isabel P. Montañezb, Fernando F. Veselyc, Roberto Iannuzzid, Roland Mundile, Qing-Zhu Yinb, Kathryn N. Paulsa, Eduardo L.M. Rosac a Department of Geosciences, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, USA b Department of Earth and Planetary Sciences, University of California, Davis, Davis, CA 95616, USA c Department de Geologia, Universidade Federal do Paraná, Curitiba, PR, Caixa Postal 19001, CEP 81531-980, Brazil d Centro de Investigações do Gondwana, Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 91.509-900, Brazil e Berkeley Geochronology Center, Berkeley, CA 94709, USA ARTICLE INFO ABSTRACT Keywords: The location, longevity, and geographic extent of late Paleozoic ice centers in west-central Gondwana remain Late Paleozoic ice age ambiguous. Paleovalleys on the Rio Grande do Sul Shield of southernmost Brazil have previously been inter- Paraná Basin preted as fjords carved by outlet glaciers that originated in Africa and emptied into the Paraná Basin (Brazil). In Detrital zircon geochronology this study, the sedimentology, stratigraphy, and provenance of sediments infilling two such paleovalleys (the Itararé Group Mariana Pimentel and Leão paleovalleys) were examined in order to test the hypothesis that an ice center over Rio Bonito Formation present day Namibia drained across southernmost Brazil during the Carboniferous and Permian. -
1 Compiled by Mike Wing New Zealand Antarctic Society (Inc) Volume 1-36: Feb 2019 Vessel Names Are Shown Viz: “Aconcagua”. S
ANTARCTIC1 Compiled by Mike Wing 12: 190, 19: 144, 22: 5, New Zealand Antarctic Society (Inc) Injury, 1: 340, 2: 118, 492, 3: 480, 509, 523, 4: 15, 8: 130, 282, 315, 317, 331, 409, Volume 1-36: Feb 2019 9: 12, 18, 19, 23, 125, 313, 394, 6: 17, 7: 6, 22, 11: 395, 12: 348, 18: 56, 19: 95, Vessel names are shown viz: “Aconcagua”. See also 22: 16, 32: 29, list of ship names under ‘Ships’. Ships All book reviews are shown under ‘Book Reviews’ ANARE, 8: 13, All Universities are shown under ‘Universities’ Argentine Navy, 1: 336, Aircraft types appear under ‘Aircraft’. “Bahia Paraiso” Obituaries & Tributes are shown under 'Obituaries', see Sinking 11: 384, 391, 441, 476, 12: 22, 200, also individual names. 353, 13: 28, Fishing, 30: 1, Vol 20 page numbers 27-36 are shared by both double Japanese, 24: 67, issues 1&2 and 3&4. Those in double issue 3&4 are NGO, 29, 62(issue 4), marked accordingly viz: 20: 4 (issue 3&4) Polar, 34, Soviet, 8: 426, Vol 27 page numbers 1-20 are shared by both issues Tourist ships, 20: 58, 62, 24: 67, 1&2. Those in issue 2 are marked accordingly viz. 27: Vehicles, (issue 2) NZ Snow-cat, 2: 118, US bulldozer, 1: 202, 340, 12: 54, Vol 29 pages 62-68 are shared by both issues 3&4. ACECRC, see Antarctic Climate & Ecosystems Duplicated pages in 4 are marked accordingly viz. 63: Cooperation Research Centre (issue 4). Acevedo, Capitan. A.O. 4: 36, Ackerman, Piers, 21: 16, Ackroyd, Lieut. -
Late Pleistocene Evolution of Glacial Lake Purcell: a Potential Floodwater Source to the Channeled Scabland
LATE PLEISTOCENE EVOLUTION OF GLACIAL LAKE PURCELL: A POTENTIAL FLOODWATER SOURCE TO THE CHANNELED SCABLAND by Jared L. Peters B.S., Bloomsburg University of Pennsylvania, 2009 A.A.S., Garrett College, 2005 THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE In the Department of Geography Faculty of Environment © Jared L. Peters 2012 SIMON FRASER UNIVERSITY Fall 2012 All rights reserved. However, in accordance with the Copyright Act of Canada, this work may be reproduced, without authorization, under the conditions for “Fair Dealing”. Therefore, limited reproduction of this work for the purposes of private study, research, criticism, review and news reporting is likely to be in accordance with the law, particularly if cited appropriately. APPROVAL Name: Jared Peters Degree: Master of Science Title of Thesis: Late Pleistocene evolution of glacial Lake Purcell: a potential floodwater source to the Channeled Scabland Examining Committee: Chair: Dr. Eugene McCann Professor, Department of Geography ______________________________________ Dr. Tracy A. Brennand Senior Supervisor Associate Professor, Department of Geography ______________________________________ Dr. Olav Lian Supervisor Faculty, Department of Geography, University of the Fraser Valley Adjunct Professor, Department of Geography ______________________________________ Dr. Richard Waitt Internal Examiner Research Geologist, Cascade Volcano Observatory ______________________________________ Dr. Dan Smith External Examiner Professor Department of Geography, University of Victoria Date Defended/Approved: September 18, 2012 ii Partial Copyright Licence ABSTRACT The Quaternary history of the Channeled Scabland (CS) and its primary floodwater sources during marine isotope stage (MIS) 2 are well documented and understood. However, putative floodwaters from glacial lakes in British Columbia are poorly understood; these lakes may have supplied floodwaters to the CS in late MIS 2 during northward retreat of the Cordilleran Ice Sheet. -
Bibliography of Alaskan Geology
BIBLIOGRAPHY OF ALASKAN GEOLOGY 1960 = 1964 ..................,.....................SPECIAL REPORT 24 Compiled by : CRAbViYFOR IDE. FRITTS and MILDRED E. BROWN Division of Geological Survey College, Alaska 1941 STATE OF ALASKA William A. Egan - Governor DEPARmNT OF NATURAL RESOURCES Charles F. Herbert - Commissioner DIVISION OF GEOLOGICAL SURVI3 James A. Williams - Director BIBLIOGRAPHY OF ALASWU GEOLOGY, 1960-1964 Compiled by Crawford E. Fritts and Yildred E. Brown College, Alaska 1971 SPECIAL REPORT 24 CONTENTS Page Introduction ................................. 1. Purpose. source and format ........................ 1 Serial publications ............................ 2 Other publishing media ..........................12 Miscellaneous abbreviations ........................14 Bibliography .................................15 Index ........... Absolute age ...... Areal geology ...... Earthquakes ....... Economic geology .... Engineering geology ... General subjects .... Geochemistry ...... Geomorphology ...... Geophysical surveys ... Glacial geology ..... Hydrogeology ...... Maps .......... Mineralogy ....... Paleoclimatology .... Paleontology ...... Petrology ........ Sedimentary petrology . Sedimentation ...... Stratigraphy ...... Structural geology ... Volcanism and volcanology \.leather ing ....... ILLUSTRATIONS Figure 1. Quadrangles and major geographic divisions of Alaska referred to inthisreport ..........................iv Figure 1. Quadrangles and major geographic divieione of Alaeka referred to in this report INTRODUCTION PURPOSE, -
The Osceola Mudflow from Mount Rainier: Sedimentology and Hazard Implications of a Huge Clay-Rich Debris Flow
The Osceola Mudflow from Mount Rainier: Sedimentology and hazard implications of a huge clay-rich debris flow James W. Vallance U.S. Geological Survey, 5400 MacArthur Boulevard, Vancouver, Washington 98661 Kevin M. Scott } ABSTRACT than debris avalanches of similar volume. The Osceola Mudflow is doc- umented here as an example of a cohesive debris flow of huge size that The 3.8 km3 Osceola Mudflow began as a water-saturated ava- can be used as a model for hazard analysis of similar flows. lanche during phreatomagmatic eruptions at the summit of Mount Rainier about 5600 years ago. It filled valleys of the White River sys- INTRODUCTION tem north and northeast of Mount Rainier to depths of more than 100 m, flowed northward and westward more than 120 km, covered The Osceola Mudflow began as an avalanche or a series of avalanches more than 200 km2 of the Puget Sound lowland, and extended into at the summit of Mount Rainier in west-central Washington State about Puget Sound. The lahar had a velocity of ≈19 m/s and peak discharge 5600 yr (4800 radiocarbon yr) B.P. (Crandell, 1971). It is the largest of sev- of ≈2.5 × 106 m3/s, 40 to 50 km downstream, and was hydraulically eral catastrophic lahars that swept down the White River drainage during dammed behind a constriction. It was coeval with the Paradise lahar, Holocene time and one of the world’s largest lahars (Fig. 1). which flowed down the south side of Mount Rainier, and was probably The distribution of the Osceola Mudflow, many of its features, and the related to it genetically. -
South Dakota State Historical Society Markers
South Dakota State Historical Society Markers (REVISED June 2020) The official South Dakota State Historical Society (SDSHS) marker program began in 1950. State Historian Doane Robinson created the program to erect markers at significant historical locations across the state. At this time, the SDSHS was a public organization and not an official part of state government. Contributions from the SDSHS funded the first markers. Robinson and interested members of the SDSHS identified potential sites and then raised money for the markers. Interested members contributed money both for specific markers and also for those to be purchased at Robinson’s discretion. Funding for these early markers was often a cooperative effort between the SDSHS and interested groups. The Department of Transportation, through its Publicity Division (forerunner of the Department of Tourism), often contributed to the erection of these markers along state highways. State Historian Will Robinson (son of Doane) continued the program reaching out to many local historical societies and civic groups who raised money to purchase markers in their communities. When the SDSHS became a part of state government, the program continued to purchase markers through donations. The marker program has always, and continues to be, primarily funded through private donations with very limited state funds expended on the program. NOTES ON THE MARKERS The marker texts presented below are how they appear on the markers themselves – errors, bad grammar, cultural insensitivities and various spellings included. NOTES ON THIS INVENTORY The markers are listed numerically. There are gaps in the number sequence. Many numbers were historically assigned to small plaques and directional arrows (example: “Marker One Mile Ahead,” that are not text specific to a site.