The Antarctic Paleoenvironment: A Perspective on Global Change Part Two ANTARCTIC American Geophysical Union RESEARCH SERIES Physical Sciences CONTRIBUTIONS TO ANTARCTIC RESEARCH I David H. Elliot, Editor ANTARCTIC OCEANOLOGY CONTRIBUTIONS TO ANTARCTIC RESEARCH II Joseph L. Reid, Editor David H. Elliot, Editor ANTARCTIC OCEANOLOGY II: THE AUSTRALIAN- CONTRIBUTIONS TO ANTARCTIC RESEARCH III NEW ZEALAND SECTOR David H. Elliot, Editor Dennis E. Hayes, Editor PHYSICAL AND BIOGEOCHEMICAL PROCESSES IN ANTARCTIC LAKES William J. Green and E. Imre Friedmann, Editors ANTARCTIC SNOW AND ICE STUDIES Malcolm Mellor, Editor ANTARCTIC SNOW AND ICE STUDIES II A. P. Crary, Editor ANTARCTIC SOILS AND SOIL FORMING PROCESSES J. C. F. Tedrow, Editor DRY VALLEY DRILLING PROJECT L. D. McGinnis, Editor GEOLOGICAL INVESTIGATIONS IN NORTHERN VICTORIA LAND Edmund Stump, Editor GEOLOGY AND PALEONTOLOGY OF THE ANTARCTIC Jarvis B. Hadley, Editor GEOLOGY OF THE CENTRAL TRANSANTARCTIC MOUNTAINS Mort D. Turner and John F. Splettstoesser, Editors GEOMAGNETISM AND AERONOMY A. H. Waynick, Editor METEOROLOGICAL STUDIES AT PLATEAU STATION, ANTARCTICA Joost A. Businger, Editor OCEANOLOGY OF THE ANTARCTIC CONTINENTAL SHELF Stanley S. Jacobs, Editor STUDIES IN ANTARCTIC METEOROLOGY Morton J. Rubin, Editor UPPER ATMOSPHERE RESEARCH IN ANTARCTICA L. J. Lanzerotti and C. G. Park, Editors THE ROSS ICE SHELF: GLACIOLOGY AND GEOPHYSICS C. R. Bentley and D. E. Hayes, Editors VOLCANOES OF THE ANTARCTIC PLATE AND SOUTHERN OCEANS W. E. LeMasurier and J. T. Thomson, Editors MINERAL RESOURCES POTENTIAL OF ANTARCTICA John F. Splettstoesser and Gisela A. M. Dreschhoff, Editors MARINE GEOLOGICAL AND GEOPHYSICAL ATLAS OF THE CIRCUM-ANTARCTIC TO 30°S Dennis E. Hayes, Editor MOLLUSCAN SYSTEMATICS AND BlOSTRATIGRAPHY Jeffrey D. Stilwell and William J. Zinsmeister THE ANTARCTIC PALEOENVIRONMENT: A PERSPECTIVE ON GLOBAL CHANGE James P. Kennett and Detlef A. Warnke, Editors ANTARCTIC RESEARCH American Geophysical Union SERIES Biological and Life Sciences ANTARCTIC TERRESTRIAL BIOLOGY George A. Llano, Editor BIOLOGY OF THE ANTARCTIC SEAS TERRESTRIAL BIOLOGY II Milton O. Lee, Editor Bruce Parker, Editor BIOLOGY OF THE ANTARCTIC SEAS II TERRESTRIAL BIOLOGY III George A. Llano, Editor Bruce Parker, Editor BIOLOGY OF THE ANTARCTIC SEAS III George A. Llano and Waldo L. Schmitt, Editors BIOLOGY OF THE ANTARCTIC SEAS IV ANTARCTIC ASCIDIACEA George A. Llano and I. Eugene Wallen, Editors Patricia Kott BIOLOGY OF THE ANTARCTIC SEAS V ANTARCTIC BIRD STUDIES David L. Pawson, Editor Oliver L. Austin, Jr., Editor BIOLOGY OF THE ANTARCTIC SEAS VI ANTARCTIC PINNIPEDIA David L. Pawson, Editor William Henry Burt, Editor BIOLOGY OF THE ANTARCTIC SEAS VII ANTARCTIC ClRRIPEDIA David L. Pawson, Editor William A. Newman and Arnold Ross BIOLOGY OF THE ANTARCTIC SEAS VIII BIRDS OF THE ANTARCTIC AND SUB-ANTARCTIC David L. Pawson and Louis S. Kornicker, Editors George E. Watson BIOLOGY OF THE ANTARCTIC SEAS IX ENTOMOLOGY OF ANTARCTICA Louis S. Kornicker, Editor J. Linsley Gressitt, Editor BIOLOGY OF THE ANTARCTIC SEAS X HUMAN ADAPTABILITY TO ANTARCTIC CONDITIONS Louis S. Kornicker, Editor E. K. Eric Gunderson, Editor BIOLOGY OF THE ANTARCTIC SEAS XI POLYCHAETA ERRANTIA OF ANTARCTICA Louis S. Kornicker, Editor Olga Hartman BIOLOGY OF THE ANTARCTIC SEAS XII POLYCHAETA MYZOSTOMIDAE AND SEDENTIARIA OF David L. Pawson, Editor ANTARCTICA BIOLOGY OF THE ANTARCTIC SEAS XIII Olga Hartman Louis S. Kornicker, Editor RECENT ANTARCTIC AND SUBANTARCTIC BRACHIOPODS BIOLOGY OF THE ANTARCTIC SEAS XIV Merrill W. Foster Louis S. Kornicker, Editor BIOLOGY OF THE ANTARCTIC SEAS XV Louis S. Kornicker, Editor BIOLOGY OF THE ANTARCTIC SEAS XVI Louis S. Kornicker, Editor BIOLOGY OF THE ANTARCTIC SEAS XVII Louis S. Kornicker, Editor BIOLOGY OF THE ANTARCTIC SEAS XVIII Louis S. Kornicker, Editor BIOLOGY OF THE ANTARCTIC SEAS XIX Louis S. Kornicker, Editor BIOLOGY OF THE ANTARCTIC SEAS XX Louis S. Kornicker, Editor BIOLOGY OF THE ANTARCTIC SEAS XXI Louis S. Kornicker, Editor BIOLOGY OF THE ANTARCTIC SEAS XXII Stephen D. Cairns, Editor ANTARCTIC Volume 60 RESEARCH SERIES The Antarctic Paleoenvironment: A Perspective on Global Change Part Two James P. Kennett Detlef A. Warnke Editors American Geophysical Union Washington, D.C. 1993 ANTARCTIC Volume 60 RESEARCH SERIES Published under the aegis of the Board of Associate Editors, Antarctic Research Series David H. Elliot, Chairman John B. Anderson, Robert Bindschadler, Stephen D. Cairns, Rodney M. Feldmann, Stanley Jacobs, John Priscu, Charles R. Stearns Library of Congress Cataloging-in-Publication Data (Revised for vol. 2) The Antarctic paleoenvironment. (Antarctic research series, 0066-4634 ; v. 56, 60) Papers from a conference held at the University of California, Santa Barbara, Aug. 28-31, 1991. Includes bibliographical references. 1. Paleogeography—Antarctic regions—Congresses. 2. Paleocology—Antarctic regions—Congresses. I. Kennett, James P. II. Warnke, Detlef A. QE501.4.P3A64 1992 560'.45'09989 92-37312 ISBN 0-87590-823-3 (pt. 1) ISBN 0-87590-838-1 (pt. 2) ISSN 0066-4634 Copyright 1993 by the American Geophysical Union 2000 Florida Avenue, N.W. Washington, DC 20009 Figures, tables, and short excerpts may be reprinted in scientific books and journals if the source is properly cited. Authorization to photocopy items for internal or personal use, or the internal or personal use of specific clients, is granted by the American Geophysical Union for libraries and other users registered with the Copyright Clearance Center (CCC) Transactional Reporting Service, provided that the base fee of $1.00 per copy plus $0.10 per page is paid directly to CCC, 21 Congress Street, Salem, MA 10970. 0066-4634/92/$01. + .10. This consent does not extend to other kinds of copying, such as copying for creating new collective works or for resale. The reproduction of multiple copies and the use of full articles or the use of extracts, including figures and tables, for commercial purposes requires permission from AGU. Published by American Geophysical Union Printed in the United States of America. viii CONTENTS The Antarctic Research Series: Statement of Objectives Board of Associate Editors Preface James P. Kennett and Detlef A. Warnke Acknowledgments James P. Kennett and Detlef A. Warnke Southern Ocean Influences on Late Eocene to Miocene Deepwater Circulation James D. Wright and Kenneth G. Miller Late Eocene to Oligocene Vertical Oxygen Isotopic Gradients in the South Atlantic: Implications for Warm Saline Deep Water Gregory A. Mead, David A. Hodell, and Paul F. Ciesielski Eocene to Oligocene Oceanography and Temperatures in the Antarctic Indian Ocean Enriqueta Barrera and Brian T. Huber Nothofagus Fossils in the Sirius Group, Transantarctic Mountains: Leaves and Pollen and Their Climatic Implications Robert S. Hill and Elizabeth M. Tr us well Cenozoic Glacial Sequences of the Antarctic Continental Margin as Recorders of Antarctic Ice Sheet Fluctuations Alan K. Cooper, Stephen Eittreim, Uri ten Brink, and Igor Zayatz Cenozoic Sedimentary and Climatic Record, Ross Sea Region, Antarctica Michael J. Hambrey and Peter J. Barrett Cenozoic Southern Mid- and High-Latitude Biostratigraphy and Chronostratigraphy Based on Planktonic Foraminifera D. Graham Jenkins Cenozoic Southern Ocean Reconstructions From Sedimentologic, Radiolarian, and Other Microfossil Data Dave Lazarus and Jean Pierre Caulet The Evolution of the Cenozoic Southern High- and Mid-Latitude Planktonic Foraminiferal Faunas D. Graham Jenkins Unusual Silicoflagellate Skeletal Morphologies From the Upper Miocene-Lower Pliocene: Possible Ecophenotypic Variations From the High- Latitude Southern Oceans Kevin McCartney and Sherwood W. Wise, Jr. 195 Late Neogene Antarctic Glacial History: Evidence From Central Wright Valley M. L. Prentice, J. G. Bockheim, S. C. Wilson, L. H. Burckle, D. A. Hodell, C. Schluchter, and D. E. Kellogg 207 Coastal East Antarctic Neogene Sections and Their Contribution to the Ice Sheet Evolution Debate Patrick G. Quilty 251 300-Year Cyclicity in Organic Matter Preservation in Antarctic Fjord Sediments Eugene W. Domack, Tracy A. Mashiotta, Lewis A. Burkley, and Scott E. Ishman 265 List of Co-chief Scientists on DSDP and ODP Legs 273 The Antarctic Research Series: STATEMENT OF OBJECTIVES The Antarctic Research Series provides for the presentation of detailed scientific research results from Antarctica, particularly the results of the United States Antarctic Research Program, including monographs and long manuscripts. The series is designed to make the results of Antarctic fieldwork available. The Antarctic Research Series encourages the collection of papers on specific geographic areas within Antarc tica. In addition, many volumes focus on particular disciplines, including marine biology, oceanology, meteorology, upper atmosphere physics, terrestrial biology, geology, glaciology, human adaptability, engineering, and environmental protection. Topical volumes in the series normally are devoted to papers in one or two disciplines. Multidisciplinary volumes, initiated in 1990 to enable more rapid publication, are open to papers from any discipline. The series can accommodate long manuscripts and utilize special formats, such as maps. Priorities for publication are set by the Board of Associate Editors. Preference is given to research manuscripts from projects funded by U.S. agencies. Because the series serves to emphasize the U.S. Antarctic Research Program, it also performs a function similar to expedition reports of many other countries with national Antarctic research programs. The standards of scientific excellence expected for the series are maintained by the review criteria established for the AGU publications program. Each paper is critically reviewed by two or more expert referees. A member of the Board of Associate Editors may serve as editor of a volume, or another person may be appointed. The Board works with the individual editors of each volume and with the AGU staff to assure that the objectives of the series are met, that the best possible papers are presented, and that publication is timely. Proposals for volumes or papers offered should be sent to the Board of Associate Editors, Antarctic Research Series, at 2000 Florida Avenue, N.W., Washington, D.C. 20009. Publication of the series is partially supported by a grant from the National Science Foundation. Board of Associate Editors Antarctic Research Series xi PREFACE The Antarctic continent and the surrounding South are thematic in nature; (3) to assist in formulating plans ern Ocean represent one of the major climate engines of for future Antarctic ocean drilling; and (4) to organize the Earth: coupled components critical in the Earth's publication of a series of summary/synthesis papers environmental system. The contributions in this volume leading to two volumes. Although it has been the help with the understanding of the long-term evolution intention of the scientific community to produce sum of Antarctica's environment and biota. The aim of this mary or synthesis volumes of thematic or regional and the preceding companion volume is to help place nature related to ocean drilling, few have yet been the modern system within a historical context. published. Therefore a major objective of this and the The environment and biosphere of the Antarctic first volume is to help make the results of ocean drilling region have undergone dynamic changes through geo more widely available to the scientific community. logic time. These, in turn, have played a key role in In addition to these volumes the conference also led long-term global paleoenvironmental evolution. The de to the production of a white paper, compiled by J. velopment of the Southern Ocean itself, resulting from Kennett and J. Barron (available from JOI/USSAC, plate tectonism, created first-order changes in the cir Washington, D.C), that summarizes major remaining culation of the global ocean, in turn affecting meridional questions related to Southern Ocean paleoenvironmen heat transport and hence global climates. Biospheric tal evolution and outlines further ocean drilling required changes responded to the changing oceanic climatic to assist in answering these questions. Selected material states. Comprehension of the climatic and oceano- from the white paper was modified and incorporated in graphic processes that have operated at various times in the introduction to the first volume. Antarctica's history is crucial to the understanding of This volume presents 13 papers of general and syn the present-day global environmental system. This thetic nature on a wide variety of topics related to the knowledge will become increasingly important in paral environmental and biotic evolution of the Antarctic and lel with concerns about anthropogenically caused global southern high-latitude oceans. The contributions incor change. How vulnerable is the Antarctic region, espe porate a range of recent concepts that deal with the cially its ice sheets, to global warming? The question is paleoclimatology, paleoceanography and paleobiogeog- not parochial, given the potential of sea level change raphy of the Antarctic region, especially in relation to resulting from any Antarctic cryospheric development. the evolution of the continental cryosphere. The volume Conversely, how much of a role does the Antarctic is organized so that the papers are presented in general region, this giant icebox, play in moderating global, order of geologic age, beginning with the Eocene and including sea level, change? ending with the last several hundred years. As in the This is the second of two volumes in the American first volume, this arrangement was selected to help Geophysical Union's Antarctic Research Series to emphasize the evolution of the Antarctic environmental present contributions that deal with the paleoenviron and biotic system during the late Phanerozoic. The mental and biotic evolution of the Antarctic region. The subject is not without controversy, as shown by a papers are based on work presented at a conference number of the papers included in this volume. The held at the University of California, Santa Barbara, stratigraphic records from the deep sea, continental August 28-31, 1991, entitled "The Role of the Southern margins, and land have been examined in these contri Ocean and Antarctica in Global Change: An Ocean butions at various stratigraphic resolutions from tens of Drilling Perspective." This conference, jointly spon millions of years to as high as several decades. A wide sored by JOI/USSAC and the Division of Polar Pro range of approaches have been employed, either singly grams, National Science Foundation, was attended by or in combination, to decipher the paleoenvironmental more than 100 scientists from around the world. The record and include oxygen and carbon isotopes, micro- primary objectives of the meeting were successful in fossils, plant fossils, sediments, glacial morphology, and providing a forum (1) to summarize existing paleoenvi seismic stratigraphy. ronmental data from the Antarctic region; (2) to identify and debate major remaining questions, most of which James P. Kennett and Detlef A. Warnke xin