Paleobiology and paleoenvironments of Eocene rocks, McMurdo Sound, East Antarctica

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Paleobiology and paleoenvironments of Eocene rocks, McMurdo Sound, East Antarctica

Jeffrey D. Stilwell and Rodney M. Feldmann, editors

（Antarctic research series, v. 76）

American Geophysical Union, c2000

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Includes bibliographical references

内容説明・目次

内容説明

Published by the American Geophysical Union as part of the Antarctic Research Series, Volume 76. Michael K. Brett-Surman, George Washington University, observed that, "being a paleontologist is like being a coroner except all the witnesses are dead and all the evidence has been left out in the rain for 65 million years." In the study of paleontology in Antarctica it could also be added that, if not left out in the rain, most of the evidence remains buried beneath several thousand feet of ice. Elucidating the geologic history of the Antarctic continent will always be plagued with this problem. Nonetheless, numerous clever means have been used to extract as much information as is possible, and as presented in this volume. In this light, one of the most intriguing time intervals in Antarctic history is the Eocene Epoch. During this time, the climatic conditions deteriorated rapidly from the so-called "Greenhouse" conditions that dominated Earth's conditions from mid-Mesozoic time through the early Cenozoic to the "Icehouse" conditions that have dominated the climate since that time. Unfortunately, the record of Eocene rocks on the continent is sparse. On the Antarctic Peninsula, specifically on Seymour Island, a robust record of Eocene rocks and fossils has provided virtually all the information we possess about this time interval. Thus the discovery and description of Eocene erratic boulders in morainal deposits in the McMurdo Sound region provides only the second site on the entire continent where we can study the paleontology of this time interval. In all likelihood, the description of erratics containing fossils from any other place in the world would warrant little study and would attract even less attention. However, when most of the vast area of Antarctica lies beneath ice and when clues to the nature of the crust of that part of the continent can be extracted only from study of erratics, the discovery carries with it some excitement.

目次

Preface Jeffrey D. Stilwell and Rodney M. Feldmann xi The McMurdo Erratics: Introduction and Overview David M. Harwood and Richard H. Levy 1 Glacial Geologya nd Origin of Fossiliferous-Erratic-BearinMgo raines,S outhernM cMurdo Sound, Antarctica: An Alternative Ice Sheet Hypothesis Gary S. Wilson 19 Sedimentary Lithofacies of the McMurdo Sound Erratics Richard H. Levy and David M. Harwood 39 Clay Mineral Composition of Glacial Erratics, McMurdo Sound Mary Anne Holmes 63 Marine Diatom Assemblages from Eocene and Younger Erratics, McMurdo Sound, Antarctica David M. Harwood and Steven M. Bohaty 73 Ebridian and Silicoflagellate Biostratigraphy from Eocene McMurdo Erratics and the Southern Ocean Steven M. Bohaty and David M. Harwood 99 Spores and Pollen from the McMurdo Sound Erratics, Antarctica Rosemary A. Askin 161 Tertiary Marine Palynomorphs from the McMurdo Sound Erratics, Antarctica Richard H. Levy and David M. Harwood 183 Eocene Plant Macrofossils from Erratics, McMurdo Sound, Antarctica Mike Pole, Bob Hill and David M. Harwood 243 Fossil Wood from Eocene High Latitude Forests McMurdo Sound, Antarctica Jane E. Francis 253 Eocene Mollusca (Bivalvia, Gastropoda and Scaphopoda) from McMurdo Sound: Systematica s d Paleoecologic Significance Jeffrey D. Stilwell 261 Bryozoan Fragments from Eocene Glacial Erratics of McMurdo Sound, East Antarctica Urszula Hara 321 Rhynchonellide Brachiopods from Eocene to Earliest Oligocene Erratics in the McMurdo Sound Region, Antarctica Daphne E. Lee and Jeffrey D. Stilwell 325 A New Species of Austrobalanus (Cirripedia, Thoracicia) from Eocene Erratics, Mount Discovery, McMurdo Sound, East Antarctica John St. J. S. Buckeridge 329 Callichirus symmetricus (Decapoda: Thalassinoidea) and Associated Burrows, Eocene, Antarctica Carrie E. Schweitzer and Rodney M. Feldmann 335 Fish Remains from the Eocene of Mount Discovery, East Antarctica Douglas H. Long and Jeffrey D. Stilwell 349 A Probable Piscivorous Crocodile from Eocene Deposits of McMurdo Sound, East Antarctica Paul M.A. Willis and Jeffrey D. Stilwell 355 The First Record of a Fossil Bird from East Antarctica Craig M. Jones 359 Paleobiogeographic Synthesis of the Eocene Macrofauna from McMurdo Sound, Antarctica Jeffrey D. Stilwell and William J. Zinsmeister 365

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