DOCSLIB.ORG

PDF (Zeng-Thesis.Pdf)

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
PDF (Zeng-Thesis.Pdf) Non-modal Partial Melting of Metasedimentary Pendants in the Southern Sierra Nevada and Implications for the Deep Origin of Within-pluton Isotopic Heterogeneity Thesis by Lingsen Zeng In Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy California Institute of Technology Pasadena, California Defended on September 15, 2003 © 2004 Lingsen Zeng All Rights Reserved - ii - Acknowledgment Every rock speaks for itself, and every geomorphic feature speaks for itself too. The best achievement is to learn, appreciate, and enjoy the beauty and essence of geology for the past five years. Pursuing a PhD degree at Caltech is proved to be a great personal journey. It is great to get to know those great scientists and personalities, but also learn from fellow students. I would like to thank my advisor, Jason Saleeby. To me, he is more a friend than an advisor. His door always is open to me and he listens to my research plans and half- baked ideas. I greatly appreciate his support, friendship, advice, and patience. I want to thank Hugh Taylor for serving as my academic advisor and for his encouragement. Thanks to James Chen for his timely help whenever I had questions or troubles when I was working in the radiogenic isotope lab. Thanks to Brian Wernicke and Kenneth Farley for their support of my PhD qualification research. Thanks also to John Eiler, George Rossman, Peter Wyllie, Paul Asimow, Leon Silver, Gerald Wasserburg, Kerry Sieh, Ed Stolper, and other faculty members in the GPS Division for encouragement and sharing ideas. Thanks to Mihai Ducea and Cin-Ty Lee for their friendship. I am grateful to Zhiqing Xu, Haibing Li and Jingsui Yang who are at the Institute of Geology, Chinese Academy of Geological Sciences, for continuously to share the progresse made in China. Thanks to Jim O’Donnel and Susan Leising who make the library a lovely working place. Thanks to Lindsey M. Hedges for her assistance in sample and photo preparation. Thanks to Francis Alberade and Janne Blichert-Toft for their sharing ideas with regard to the mantle and crustal geochemistry, when they were at Caltech as visiting scholars. Thanks Terry Gennaro for his friendship and assistance that greatly facilitated every field trip I have taken. Thanks to all the secretaries working in the GPS Division for their efforts to make things work smoothly. - iii - Thanks to all fellow graduate students and postdocs in the GPS Division who make seemingly dull graduate study enjoyable. Thanks especially to Zhengrong Wang, Edwin Schauble, Ji Chen, Sidao Ni, Xianglei Huang, Kaiwen Xia, Liz Johnson, Julie O’Leary, Er Tan, Bruce Hsu, Yongqin Jiao, Zhimei Yan, Shing-Lin Wang, Ying Tan, The-Ru Song, Danny Natawidjaja, Chi Ma, Hiroto Kimura, Heping Liu, Joe Akins for their friendship. I would like to thanks my wife, Jing Liu, for her love, her push, and her encouragement, and my daughter, Carisa Zeng, for her enrichment of my daily and family life. - iv - Abstract Results from field mapping, structural analysis, major and trace element geochemistry, and radiogenic isotopic data from the Goat Ranch migmatite complex on the south shore of Lake Isabella, southern Sierra Nevada, California, are presented to (1) determine the major and trace element, Sr and Nd isotopic compositions of anatectic melts from pelitic sources; (2) investigate the structural and metamorphic responses of the Isabella pendant to the emplacement of the Goat Ranch pluton at ~100 Ma; and (3) evaluate the magnitude of assimilation of metasediment- derived melts by the Goat Ranch pluton at a mid-crustal level. Nd and Sr isotopic compositions were measured on the non-migmatitic distal wallrocks, leucosomes, migmatites, traverses into the Goat Ranch pluton, leucogranite dikes, and samples from the Rabbit Island, Heal Peak, and Bob Rabbit plutons. Major and trace element analyses were performed on selected samples of the leucosomes, migmatites and metapelites. Major and trace element analyses in addition to field and petrographic data demonstrate that leucosomes are products from partial melting of the pelitic protolith host. These data show that (1) contamination of Goat Ranch intrusion is restricted to the immediate proximity to migmatitic wallrocks. Isotopic heterogeneity of the Goat Ranch intrusion is not related to assimilation at or near the level of exposure, but from a deeper source; (2) as compared to the metapelites, leucosomes have higher Sr and lower Sm concentrations and lower Rb/Sr ratios. Sr and Nd isotope compositions of leucosomes, migmatites and metapelites suggesting a disequilibrium partial melting of the metapelite protolith; (3) based on their Sr, Nd and other trace element characteristics, two groups of leucosomes have been identified. Group A leucosomes show distinct positive Eu anomalies, relatively high Rb, Pb, Ba and K2O contents, and low Rb/Sr ratios. Group B leucosomes have negative Eu anomalies, relatively low Rb, Pb, Ba and K2O contents, and low Rb/Sr ratios as well; (4) the leucogranite dikes also can be subdivided 87 86 87 86 into Group A (high Sr/ Sr(T) and low εNd(T)), and Group B (low Sr/ Sr(T) and high εNd(T)); (5) H2O-fluxed melting of quartz + plagioclase with minor involvement of muscovite melting - v - dominated the leucosome production; (6) Group A leucogranite dikes resulted from partial melting of the lower pelite, and Group B dikes from partial melting of the upper pelite; and (7) the Bob Rabbit pluton represents an extreme end-member case that was derived completely from melting of the upper pelite or its equivalent in depth in the I-SCR (strongly contaminated and reduced I-type pluton) zone. Strain analysis shows that progressive partial melting resulted in the loading framework transition in the upper pelite unit from LBF structure (the stronger phase forms a load-bearing framework) to IWL structure (the weaker phase forms an interconnected weak matrix) with proximity to the pluton. The presence of melts has greatly affected the strain partitioning within the migmatite zone. By incorporating accessory phase dissolution kinetics into non-modal partial melting of metasedimentary sources, theoretical modeling shows that non-modal partial melting of a pelitic 87 86 source results in melts following two paths in εNd- Sr/ Sr ratio space. Path 1 represents those partial melting reactions that favor muscovite/biotite dehydration and apatite but not monazite 87 86 dissolution, leading to melts with elevated Rb/Sr, Sr/ Sr, Sm/Nd, and εNd values. In contrast, Path 2 represents those partial melting reactions in which muscovite/biotite dehydration plays an insignificant role, and favor monazite over apatite dissolution, and lead to melts with lower 87 86 Rb/Sr, Sr/ Sr, Sm/Nd, and εNd values than their sources. - vi - Table of Contents Title page………………………………………………………………………………….i Copyright page…………………………………………………………………………..ii Acknowledgement………………………………………………………………………iii Abstract…………………………………………………………………………………..v Table of Contents……………………………………………………………………...vii List of Tables……………………………………………………………………………iv List of Figures……………………………………………………………………………x Chapter 1. Granitic batholith, crustal anatexis, and migmatite: Introduction and thesis overview…………………………………………………………………………..1 Chapter 2. The origin of within-pluton isotopic heterogeneities in the southern Sierra Nevada batholith: Constraints from Sr and Nd isotopes…………………..13 Chapter 3. Non-modal crustal anatexis during the formation of migmatite at the southern Sierra Nevada, California………………………………………………….42 Chapter 4. Progressive melting of metasedimentary wallrocks and its effects on the strain partitioning: An example from the southern Sierra Nevada batholith, California………………………………………………………………………………..94 Chapter 5. Partial melting of pelitic sources and the origin of leucogranitic dikes in the Isabella pendant, southern Sierra Nevada, California…………………….131 Chapter 6. Sr and Nd isotope systematics of anatectic melts: exploring the role of accessory phases and non-modal partial melting………………………………...164 References……………………………………………………………………………204 Appendix 1 Samples for petrography, geochemical and radiogenic isotopic analysis………………………………………………………………………………. 216 - vii - Appendix 2 Major and trace element geochemistry data of the leucosomes, migmatites, and the upper pelite unit………………………………………………218 Appendix 3 Plate 1 Geologic map of the Goat Ranch area, south Lake Isabella area, California……………………………………………………………………….219 - viii - List of Tables Chapter 2 Table 1 Whole rock Rb-Sr and Sm-Nd isotopic compositions of granodiorites, mafic enclaves, pelitic metapelite, psamitic metapelite, migmatites and leucosomes from Lake Isabella area, southern Sierra Nevada……………………………………………………41 Chapter 3 Table 1 Major and trace element analysis results for selected samples of metapelite, migmatite and leucosomes……………………………………………………………….92 Table 2 Nd and Sr isotope compositions of metapelite protoliths, migmatites and leucosomes……………………………………………………………………………….93 Chapter 5 Table 1. Leucogranite dike sample descriptions..............................................................151 Table 2. Rb-Sr and Sm-Nd isotopic compositions of leucogranite dikes, the Rabbit Island, Rob Rabbit and Heald Peak plutons, lower and upper pelite units, and leucosomes from the Lake Isabella area, southern Sierra Nevada, California…………………………….153 Chapter 6 Table 1 Parameters for Rb, Sr, Sm and Nd trace element modeling…………………...202 - ix - List of Figures Chapter 1 Figure 1 Generalized geologic map of the Lake Isabella area, southern Sierra Nevada,
Load more

Recommended publications
  • Yale Law School 2007-2008
    bulletin of yale university bulletin of yale Series 1o3 8 Number 10, 2007 August 2007–2008 Yale Law School Yale bulletin of yale university August 10, 2007 Yale Law School Periodicals postage paid Periodicals Connecticut Haven, New 06520-8227 CT New Haven Haven New bulletin of yale university bulletin of yale Bulletin of Yale University The University is committed to basing judgments concerning the admission, education, and employment of individuals upon their qualifications and abilities and a∞rmatively Postmaster: Send address changes to Bulletin of Yale University, seeks to attract to its faculty, sta≠, and student body qualified persons of diverse back- PO Box 208227, New Haven CT 06520-8227 grounds. In accordance with this policy and as delineated by federal and Connecticut law, Yale does not discriminate in admissions, educational programs, or employment PO Box 208230, New Haven CT 06520-8230 against any individual on account of that individual’s sex, race, color, religion, age, Periodicals postage paid at New Haven, Connecticut disability, status as a special disabled veteran, veteran of the Vietnam era, or other covered veteran, or national or ethnic origin; nor does Yale discriminate on the basis of Issued seventeen times a year: one time a year in May, November, and December; sexual orientation or gender identity or expression. two times a year in June; three times a year in July and September; six times a year University policy is committed to a∞rmative action under law in employment of in August women, minority group members, individuals with disabilities, special disabled veterans, veterans of the Vietnam era, and other covered veterans.
    [Show full text]
  • University Microfilms International 300 North Zeeb Road Ann Arbor, Michigan 48106 USA St
    INFORMATION TO USERS This material was produced from a microfilm copy of tha original document. Whila the most advanced technological meant to photograph and reproduce this document have been used, tha quality is heavily dependent upon the quality of the original submitted. The following explanation of techniques is provided to help you understand markings or patterns which may appear on this reproduction. 1. The sign or "target" for pages apparently lacking from the document photographed is "Missing Pegs(s)". If it was possible to obtain the missing page(s) or section, they are spliced into the film along with adjacent pages. This may have necessitated cutting thru an image and duplicating adjacent pagas to insure you complete continuity. 2. When an image on the film is obliterated with a large round black mark, it is an indication that the photographer suspected that the copy may have moved during exposure and thus cause a blurred image. You will find » good image of the pege in the adjacent frame; 3. Whan a map, drawing or chart, etc., was part of the materiel being photographed the photographer followed a definite method in "sectioning" the material. It is customary to begin photoing at tha upper left hand comer of a large sheet and to continue photoing from left to right iii equal sections with a small overlap. If necessary, sectioning is continued again — beginning below the first row and continuing on until complete. 4. The majority of users indicate that the textual content is of greatest value, however, a somewhat higher quality reproduction could be made from "photographs" if essential to the understanding of the dissertation.
    [Show full text]
  • Dear Friends
    Department of Earth and Planetary Sciences University of Tennessee, Knoxville 2005 Annual Newsletter 2005 Newsletter Department of Earth and Planetary Sciences University of Tennessee, Knoxville Editors: Larry McKay and Bill Deane Cover photos: Top Right: Geology 586 – Field and Lab Methods in Hydrogeology – goes caving. Photo courtesy of Larry McKay. Top Left: This specimen measuring 40 mm is Pentremites robustus from the Sloan's Valley Member of the Pennington Formation, Upper Mississippian from near Berea, Kentucky. Photo courtesy of Colin Sumrall. Bottom: No, this is not the Vol Navy! Larry McKay and Vijay Vulava are preparing to collect sediments from Chattanooga Creek. Photo courtesy of Larry McKay. The University of Tennessee does not discriminate on the basis of race, sex, religion, national origin, age, disability, or veteran status in provision of educational programs and services or employment opportunities and benefits. This policy extends to both employment and admission to the University. The University does not discriminate on the basis of race, sex or disability in the educational programs and activities pursuant to the requirements of the Title VI of the Civil Rights Act of 1964, Title IX of the Educational Amendments of 1972, Section 504 of the Rehabilitation Act of 1973, and the Americans with Disabilities Act (ADA) of 1990. Inquiries and charges of violation concerning Title VI, Title IX, Section 504, ADA or the Age Discrimination in Employment Act (ADEA) or any of the other above referenced policies should be directed to the Office of Equity and Diversity (OED), 1840 Melrose Avenue, Knoxville, TN 37996-3560, telephone (865) 974- 2498 (V/TTY available) or 974-2440.
    [Show full text]
  • Charles G. Dawes Archive
    Charles Deering McCormick Library of Special Collections Northwestern University Library, Evanston, Illinois 60208-2300 Charles G. Dawes Archive Biography: Charles Gates Dawes (1865-1951), prominent in U.S. politics and business, served as Comptroller of the Currency (1898-1901), director of the Military Board of Allied Supply (1918-1919), and first director of the Bureau of the Budget (1921). He received a Nobel Peace Prize as chairman of the Reparations Commission which restructured Germany's economy and devised a repayment plan (1924). He was elected Vice-President (1925- 1929), and appointed ambassador to England (1929-1931) and chairman of the Reconstruction Finance Corporation (1932). Charles and his brothers founded Dawes Brothers Incorporated. Dawes formed the Central Trust Co. in Chicago (1902), guided its successor banks, and was influential in Chicago business, politics, and philanthropy until his death. Charles Gates Dawes was born and educated in Ohio. He married Caro Blymyer in 1889, practiced law, and incorporated a real estate business in Lincoln, Nebraska, before moving to Evanston, Illinois in 1895. He acquired utility companies and real estate in northern Illinois and Wisconsin; and in 1908, with his brothers Henry, Rufus, and Beman, formed Dawes Brothers Incorporated, to invest assets in banks, oil companies and real estate throughout the country. Various acquaintances who were prominent in political and industrial affairs trusted them to manage their investments as well. Other companies in which Charles Dawes and his brothers played leading roles included Chicago's Central Trust Co. and its successor banks and Pure Oil Company of Ohio. Dawes made significant philanthropic contributions to the Chicago metropolitan community.
    [Show full text]
  • Albert Francis Birch 3 by Thomas J
    http://www.nap.edu/catalog/6201.html We ship printed books within 1 business day; personal PDFs are available immediately. Biographical Memoirs V.74 Office of the Home Secretary, National Academy of Sciences ISBN: 0-309-59186-4, 398 pages, 6 x 9, (1998) This PDF is available from the National Academies Press at: http://www.nap.edu/catalog/6201.html Visit the National Academies Press online, the authoritative source for all books from the National Academy of Sciences, the National Academy of Engineering, the Institute of Medicine, and the National Research Council: • Download hundreds of free books in PDF • Read thousands of books online for free • Explore our innovative research tools – try the “Research Dashboard” now! • Sign up to be notified when new books are published • Purchase printed books and selected PDF files Thank you for downloading this PDF. If you have comments, questions or just want more information about the books published by the National Academies Press, you may contact our customer service department toll- free at 888-624-8373, visit us online, or send an email to [email protected]. This book plus thousands more are available at http://www.nap.edu. Copyright © National Academy of Sciences. All rights reserved. Unless otherwise indicated, all materials in this PDF File are copyrighted by the National Academy of Sciences. Distribution, posting, or copying is strictly prohibited without written permission of the National Academies Press. Request reprint permission for this book. i ined, a he original t be ret Biographical Memoirs ion. om r f ibut r t cannot not r at o f book, however, version ng, i t at ive NATIONAL ACADEMY OF SCIENCES at rm riginal paper it o f c hor i f he o t om r he aut f ng-speci http://www.nap.edu/catalog/6201.html Biographical MemoirsV.74 as t ed i t ion peset y iles creat L f her t M is publicat h X t of om and ot r f yles, version posed Copyright © National Academy ofSciences.
    [Show full text]
  • Department of Geological Sciences Newsletter No. 20, September 1971
    Department of Geological Sciences Newsletter THE UNIVERSITY OF TEXAS AT AUSTIN NO. 20, September1971 FredBullard Honored at Dinner On the evening of May 9 about 200 friends and former Azores, the Philippines,New Guinea, Slovakia,and of course, students gathered to pay tribute to Fred Bullard at a dinner Italy. Out of this have come uncounted fascinating lectures at the Villa Capri in Austin. Fred has reached the age of and a book on volcanoes so popular that it is in its fourth mandatory retirement from full-time teaching, and in spite printingandbeingrevisedcurrentlybyFred. of his continued ability andyouthful appearance,he is bring- Fred Bullard was Chairman of the Department of Geology ing his record performance as a professor to a close. His for eight years (1929-1937), and for many years he taught charm and talent as alecturer are truly superb, as everyone the courses in mineralogy, petrography, field geology and learned again that evening. several other subjects as needed. His lectures in freshmen Fred has been in the teachingprofession for 47 years, and geology were always popular but he never made the course he hasprobably taught elementary geology to morethousands easy, as many will recall. Fred helped create and sustain a of students than any other professor in the world. In recent great tradition in this department: senior professors and years he has grown accustomed to discovering the children permanent staff members do nearly all the lecturing to fresh- of his former students attending his current classes, and one men, and they take pride in the task. As Professor Emeritus, young student at the dinner, Carolyn Keyser, was preceded Fred will no longer lecture to large freshman classes, but he by both her mother, Jean Funkhouser, and her grandfather, can probably be persuaded to teach a graduate class in vol- Ernest Funkhouser,inFred'sclasses.
    [Show full text]
  • 2019 Frankfurt Rights Guide Fiction & Non-Fiction Simon & Schuster Uk Contacts
    SIMON & SCHUSTER UK 2019 FRANKFURT RIGHTS GUIDE FICTION & NON-FICTION SIMON & SCHUSTER UK CONTACTS CONTACTS FOR ALL FICTION AND NON-FICTION TITLES Stephanie Purcell Group Rights and Co-editions Director FRANKFURT BOOK FAIR 2019 [email protected] TABLE OF Maud Sepult Deputy Rights Director [email protected] CONTENTS Nino Tarkhan-Mouravi Rights Manager Contacts [email protected] 2 Amy Threadgold Rights Executive Fiction, [email protected] 3 World Rights Simon & Schuster UK Ltd 1st Floor, 222 Gray’s Inn Road, London WC1X 8HB UK Tel: 00 44 207 316 1900 UK Fax: 00 44 207 316 0332 Fiction, Find us on Twitter: @SSRights_UK 16 World English Non-fiction, 19 World Rights Non-fiction, 40 World English 2 2 Contacts FICTION Sleeper Fiction, Page 4 3 World Rights Fiction, 16 World English Non-fiction, 19 World Rights Non-fiction, 40 World English FICTION WORLD RIGHTS Sleeper JED MERCURIO is an award winning screenwriter, producer, By Jed Mercurio & Prasanna Puwanarajah director and novelist. He is the creative force behind the television Illustrated by Coke Navarro series Line of Duty, The Bodyguard, Bodies and Cardiac Arrest. He has written three novels for adults and one for children. This is his first A stunning graphic novel from the creator of Line of Duty graphic novel. DS-5, a biologically enhanced law enforcement marshal, has embarked upon his final mission. His best years behind him, he must PRASANNA PUWANARAJAL studied medicine at New College, return to the ISS Houston where he will be decommissioned. As his Oxford, working extensively in the NHS and for Médicins du Monde body is lowered into the tank which will see him permanently retired, a before moving into writing and directing.
    [Show full text]
  • Department of Geological Sciences Newsletter No. 27, September 1978
    Department of Geological Sciences 1978 No. 27, September AUSTIN. TEXAS Alumni Gather at AAPG AAPG in Oklahoma City— provided the setting for our graduate Student. Brian was born in Corpus Christi in annual alumni breakfast a time for socializing and 1956 and entered UT as a geology major in the fall of presenting awards to students and faculty. An enthusi- 1974. He was on the dean's list and participated in the astic group of 145 persons braved the early (for some) University Junior Fellows Program, completing his un- hour of 7:30 a.m. on Tuesday, April 11, to enjoy the dergraduateprogram with an impressive 3.8 grade-point festivities held in the Sheraton-Century Hotel. Several average. He was the recipient of a Robert H. Cuyler faculty presented brief highlights of the year's activities Memorial Scholarship for the senior field course (sum- at UT. Earle Mcßride outlined our "growth problems" in undergraduateclasses, identifying the special case of our field courses where the logistics of handling large groups interferes with teaching efficiency. Al Scott men- tioned that all of the large number of students who re- cently completed graduate degrees have jobs, however, he cautioned that we anticipate an evenlarger number of new graduate students this fall. Representing the Advisory Council, Mr. Ben Carsey spoke on the signifi- cant role the Geology Foundation plays in aiding De- partmental activities. He thanked the alumni for their interest in the Department and urged them to continue their fine support. The highlight of the program was the presentation of awards. Brian E.
    [Show full text]
  • The Plate Tectonic Setting of Southeastern Arizona Peter J
    New Mexico Geological Society Downloaded from: http://nmgs.nmt.edu/publications/guidebooks/29 The plate tectonic setting of southeastern Arizona peter J. Coney, 1978, pp. 285-290 in: Land of Cochise (Southeastern Arizona), Callender, J. F.; Wilt, J.; Clemons, R. E.; James, H. L.; [eds.], New Mexico Geological Society 29th Annual Fall Field Conference Guidebook, 348 p. This is one of many related papers that were included in the 1978 NMGS Fall Field Conference Guidebook. Annual NMGS Fall Field Conference Guidebooks Every fall since 1950, the New Mexico Geological Society (NMGS) has held an annual Fall Field Conference that explores some region of New Mexico (or surrounding states). Always well attended, these conferences provide a guidebook to participants. Besides detailed road logs, the guidebooks contain many well written, edited, and peer-reviewed geoscience papers. These books have set the national standard for geologic guidebooks and are an essential geologic reference for anyone working in or around New Mexico. Free Downloads NMGS has decided to make peer-reviewed papers from our Fall Field Conference guidebooks available for free download. Non-members will have access to guidebook papers two years after publication. Members have access to all papers. This is in keeping with our mission of promoting interest, research, and cooperation regarding geology in New Mexico. However, guidebook sales represent a significant proportion of our operating budget. Therefore, only research papers are available for download. Road logs, mini-papers, maps, stratigraphic charts, and other selected content are available only in the printed guidebooks. Copyright Information Publications of the New Mexico Geological Society, printed and electronic, are protected by the copyright laws of the United States.
    [Show full text]
  • EERI Oral History Series, Vol. 10, Clarence R. Allen
    CONNECTIONS The EERI Oral History Series Clarence R. Allen Stanley Scott Interviewer CONNECTIONS The EERI Oral History Series Clarence R. Allen CONNECTIONS The EERI Oral History Series Clarence R. Allen Stanley Scott, Interviewer Earthquake Engineering Research Institute Acknowledgments The help, encouragement, and editorial feedback of EERI Executive Director Susan K. Tubbesing and the EERI Board of Directors were instrumental in both establishing Connections: The EERI Oral History Series and in bringing this volume to publication. EERI gratefully acknowledges partial funding of this project by the Federal Emergency Management Agency (FEMA). v vi Table of Contents Acknowledgments v The EERI Oral History Series ix Foreword, by Stanley Scott xiii Personal Introduction, by Lloyd S. Cluff xv Chapter 1 Early Years and Family Background 1 Chapter 2 1942-1946: Reed College and World War II 13 Chapter 3 Caltech: Graduate Work and Joining the Faculty 19 Chapter 4 Field Studies of Faults and the Geology of Earthquakes 27 Chapter 5 Colleagues and Work at Caltech 37 Chapter 6 Consulting on Major Dams and Water Projects 41 Chapter 7 Nuclear Concerns: Power Plants and Waste Disposal 55 Chapter 8 Significant Scientific Papers 61 Chapter 9 Service on Local, State, National, and International Boards 81 Chapter 10 Interdisciplinary Communication and EERI 91 Chapter 11 Personal Notes 95 Photographs 99 Index 111 vii viii The EERI Oral History Series This is the tenth volume in Connections: The EERI Oral History Series. The Earthquake Engineering Research Institute initiated this series to preserve the recollections of some of those who have pioneered in earthquake engineering and seismic design.
    [Show full text]
  • SENATE January 7 How Many of These Hoarded Idle Acres That Many Acres Are Being.Held in Exc~Ss Government Against Thousands of Are Really Still Needed by the Army
    42 CONGRESSIONAL RECORD- SENATE January 7 how many of these hoarded idle acres that many acres are being.held in exc~ss Government against thousands of are really still needed by the Army. of need both from the standpoint of civilians. My colleagues from other parts of the quantity and time. The military is a large landholder on Nation will, I am sure, instantly think of Acquisition by the Military Establish­ Chesapeake Bay. It owns Governor's other examples of questionable retention ment has not always been circumspect. Island in New York. It is ever acquir­ of real estate by the Military Establish­ Camp Pendleton was acquired without ing more and more land while seeming ment. Of course, ·none of us would rec­ ommend any curtailment or removal of adequate determination of water sup­ reticent to let go of any. Assistant Sec­ installations where this would weaken plies. This has resulted in the bringing retary Floete deserves commendation for our military forces, but I am convinced of a costly and irritating lawsuit by the tackling this important problem. The message also informed the Senate The VICE PRESIDENT. Is there ob­ SENATE that a committee of three Members had jection? The Chair hears none and it been appointed by the Speaker on the is so ordered. ' THURSDAY, JANUARY 7, 1954 part of the House of Representatives to join with a committee on the part of the The Chaplain, Rev. Frederick Brown Senate to notify the President of the JOINT SESSION. OF THE TWO Harris, D. D., offered the following United States that a quorum of each HOUSES prayer: House had assembled and Congress was Mr.
    [Show full text]
  • GSA TODAY • Call for Award Nominations, P
    Vol. 6, No. 10 October 1996 INSIDE • First International Secretary Named, p. 22 • 1996 Honorary Fellows, p. 23 GSA TODAY • Call for Award Nominations, p. 26 A Publication of the Geological Society of America • Southeastern Section 1997 Meeting, p. 32 Out of the Icehouse into the Greenhouse: A Late Paleozoic Analog for Modern Global Vegetational Change Robert A. Gastaldo, Department of Geol- ogy, Auburn University, AL 36849-5305, William A. DiMichele, Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, DC 20506, Hermann W. Pfefferkorn, Department of Geology, University of Pennsylvania, Philadelphia, PA 19104-6316 L ABSTRACT A change to global greenhouse con- ditions following deglaciation occurred during the late Paleozoic. The deep-past data set preserved in the stratigraphic C record can serve as a model system to understand vegetational responses dur- ing this kind of climatic change, espe- cially in the tropics. No other time in Earth history so mimics the late Ceno- FSSP zoic or provides the long-term data set from which generalizations can be Figure 1. Reconstruction of middle late Carboniferous tropical coal swamp showing different plant deduced. Two long-term glacial cycles communities made up of tree lycopods (L, tree club mosses), tree sphenopsids (two brushlike trees above letter S in center and tree scouring rushes), tree ferns (F), pteridosperms (P, seed plants with have been identified in Permian-Car- fernlike leaves; extinct group), and cordaites (C, seed plants with strap-shaped leaves; extinct group). boniferous time. The waxing and wan- From a painting by Alice Prickett, published in black and white in Phillips and Cross (1991, pl.
    [Show full text]