SOLID-EARTH SCIENCES AND SOCIETY

Committee on Status and Research Objectives in the Solid-Earth Sciences: A Critical Assessment

Board on Earth Sciences and Resources

Commission on Geosciences, Environment, and Resources

National Research Council

NATIONAL ACADEMY PRESS
Washington, D.C.
1993



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Solid-Earth Sciences and Society SOLID-EARTH SCIENCES AND SOCIETY Committee on Status and Research Objectives in the Solid-Earth Sciences: A Critical Assessment Board on Earth Sciences and Resources Commission on Geosciences, Environment, and Resources National Research Council NATIONAL ACADEMY PRESS Washington, D.C. 1993

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Solid-Earth Sciences and Society NATIONAL ACADEMY PRESS 2101 Constitution Avenue, N.W. Washington, D.C. 20418 NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine. The members of the committee responsible for the report were chosen for their special competences and with regard for appropriate balance. This report has been reviewed by a group other than the authors according to procedures approved by a Report Review Committee consisting of members of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine. Support for this study was provided by the W. M. Keck Foundation, the G. Unger Vetlesen Foundation, and the National Academy of Sciences' Arthur L. Day Fund and Maurice Ewing Earth and Planetary Science Fund. Library of Congress Cataloging-in-Publication Data National Research Council (U.S.). Committee on the Status and Research Opportunities in the Solid-Earth Sciences. Solid-Earth Sciences and Society/Committee on the Status and Research Opportunities in the Solid-Earth Sciences, Board on Earth Sciences and Resources, Commission on Geosciences, Environment, and Resources, National Research Council. p. cm. Includes bibliographical references and index. ISBN 0-309-04739-0 1. Earth sciences—United States. I. Title. QE47.A1N38 1993 550'.973—dc20 92-41781 CIP Cover art by Y. David Chung. Cover design by Rumen Buzatov. Chung and Buzatov are graduates of the Corcoran School of Art, Washington, D.C. In 1988, Chung won the Mayor's Art Award for Outstanding Emerging Artist and has exhibited widely throughout the country, including the Studio Museum in Harlem and the Whitney Museum of American Art, New York City. The cover includes many artistic depictions, both ancient and modern, of the solid-earth sciences. At the center is a subduction zone—high mountains, deep-sea trenches, and volcanic activity. The frog dropping a ball into the mouth of a dragon is part of an ancient Chinese seismometer that indicated earthquake direction. The Mariner spacecraft, used to study Mars, represents our new abilities to view the Earth and other planets on different scales. On the spine is an Armillary sphere used in Renaissance Europe as a way of depicting the Earth at the center of the universe. On the back cover are representations of a mid-ocean ridge, an offshore oil derrick, the center section of an early Mayan calendar, and plate movements off the east coast of Africa. Copyright 1993 by the National Academy of Sciences. All rights reserved. Printed in the United States of America

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Solid-Earth Sciences and Society NATIONAL RESEARCH COUNCIL 2101 CONSTITUTION AVENUE WASHINGTON, D.C. 20418 OFFICE OF THE CHAIRMAN Breakthroughs in scientific understanding during the past quarter century as well as innovative technologies for gathering and organizing large amounts of information are expanding the frontiers of knowledge in the earth sciences at an accelerating pace. Basic research has increased our understanding of the origin and internal workings of our planet, of the processes that modify our landscape, and of the evolution of life during times of quite different global environments. A new approach to studying earth processes, in which the earth is viewed as an integrated, dynamic system rather than a collection of isolated components, has emerged. Solid-Earth Sciences and Society explores these important new directions in earth sciences research and examines how they can enhance society's ability to make wise decisions on resource development, waste disposal, environmental protection, natural hazards reduction, and land use. The report, which reflects a long-term effort by a diverse expert committee, presents a vision of this rapidly changing field: its scope and goals, its emerging research issues, and its scientific contributions and applications. We have reached a critical time in the solid-earth sciences. Many in the professional community are shifting their focus from exploring for and developing resources to addressing environmental and social problems on global as well as regional scales. Others are working to maintain the research base and acquire the new knowledge upon which the applications are built. Solid-Earth Sciences and Society recommends priorities for future research and discusses the scientific challenges facing our society. It should prove helpful to the research community, to practitioners, to educators, to students, and to all of us with an interest in the earth sciences. We are particularly indebted to the W. M. Keck Foundation, without whose support this would not have been possible. Frank Press Chairman THE NATIONAL RESEARCH COUNCIL IS THE PRINCIPLE OPERATING AGENCY OF THE NATIONAL ACADEMY OF SCIENCES AND THE NATIONAL ACADEMY OF ENGINEERING TO SERVE GOVERNMENT AND OTHER ORGANIZATIONS.

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Solid-Earth Sciences and Society Prologue The GOAL is: to understand the past, present, and future behavior of the whole earth system. From the environments where life evolves on the surface to the interaction between the crust and its fluid envelopes (atmosphere and hydrosphere), this interest extends through the mantle and the outer core to the inner core. A major challenge is to use this understanding to maintain an environment in which the biosphere and humankind will continue to flourish. SOCIETAL CHALLENGES FOR EARTH SCIENCES The solid-earth sciences are essential to: provide sufficient resources—e.g., water, minerals, and fuels; cope with hazards—e.g., earthquakes, volcanoes, landslides, tsunamis, and floods; avoid perturbing geological environments—e.g., soil erosion, water contamination, improper mining practices, and waste disposal; and learn how to anticipate and adjust to environmental and global changes. RESEARCH FRAMEWORK The information needed to achieve the goal of the solid-earth sciences and to meet the societal challenges derives from research that can be described conveniently in a matrix of four objectives and five research areas. Research opportunities can be located within the elements of this matrix, and from these have been selected research topics of top-priority and high-priority. Objectives The following four objectives are derived from the challenges facing society in which fundamental understanding of the solid-earth sciences plays a primary role:

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Solid-Earth Sciences and Society Understand the processes involved in the global earth system, with particular attention to the linkages and interactions between its parts (the geospheres) Sustain a sufficient supply of natural resources Mitigate geological hazards Minimize and adjust to global and environmental change Research Areas The following research areas provide promise of achieving the scientific goal: Global paleoenvironments and biological evolution Global geochemical and biogeochemical cycles Fluids in and on the Earth Dynamics of the crust (oceanic and continental) Dynamics of the core and mantle EARTH SYSTEM SCIENCE The goal represents an integrated approach to the study of the earth system, requiring interdisciplinary investigations of the geology, physics, chemistry, and biology of the whole Earth, because all parts of the Earth are interconnected through geological, geophysical, and geochemical processes, some of which are monitored by biological activity near the surface. Attainment of the specific objectives may be greatly enhanced by more complete understanding of processes occurring on a global scale. Boundaries between basic and applied solid-earth sciences are artificial. This process-oriented, integrated global approach should be incorporated into revised earth science curricula in universities and schools. There are also educational opportunities in redefined engineering geology.

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Solid-Earth Sciences and Society COMMITTEE ON STATUS AND RESEARCH OBJECTIVES IN THE SOLID-EARTH SCIENCES: A CRITICAL ASSESSMENT PETER J. WYLLIE (Chairman), California Institute of Technology PHILIP H. ABELSON, American Association for the Advancement of Science SAMUEL S. ADAMS, Minerals Consultant, Lincoln, New Hampshire CLARENCE R. ALLEN, California Institute of Technology G. ARTHUR BARBER, Minerals Consultant, Denver, Colorado ROBIN BRETT, U.S. Geological Survey ROBERT A. BERNER, Yale University JOHN D. BREDEHOEFT, U.S. Geological Survey ROBERT G. COLEMAN, Stanford University BRUCE R. DOE, U.S. Geological Survey CHARLES L. DRAKE, Dartmouth College LARRY W. FINGER, Carnegie Institution of Washington WILLIAM L. FISHER, Texas Bureau of Economic Geology ALEXANDER F. H. GOETZ, University of Colorado ALLEN W. HATHEWAY, University of Missouri at Rolla JOHN D. HAUN, Barlow & Haun, Inc. JAMES F. HAYS, National Science Foundation WILLIAM J. HINZE, Purdue University RAYMOND JEANLOZ, University of California, Berkeley MARVIN E. KAUFFMAN, National Science Foundation JUDITH T. PARRISH, University of Arizona CHARLES T. PREWITT, Carnegie Institution of Washington LEE R. RUSSELL, ARCO Oil and Gas Company STANLEY A. SCHUMM, Colorado State University BRIAN J. SKINNER, Yale University STEVEN M. STANLEY, The Johns Hopkins University DONALD L. TURCOTTE, Cornell University KARL K. TUREKIAN, Yale University ROBERT E. WALLACE, U.S. Geological Survey DANIEL F. WEILL, National Science Foundation ROBERT E. ZARTMAN, U.S. Geological Survey Staff LALLY A. ANDERSON, Staff Assistant KEVIN C. BURKE, Scholar-in-Residence CATHERINE MAcMULLEN, Consultant THOMAS M. USSELMAN, Senior Staff Scientist

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Solid-Earth Sciences and Society BOARD ON EARTH SCIENCES AND RESOURCES WILLIAM L. FISHER (Chairman), University of Texas at Austin SAMUEL S. ADAMS, Minerals Consultant, Lincoln, New Hampshire MARK P. CLOOS, University of Texas at Austin NEVILLE G. W. COOK, University of California, Berkeley JOEL DARMSTADTER, Resources for the Future DONALD J. DEPAOLO, University of California, Berkeley GORDON P. EATON, Lamont-Doherty Geological Observatory W. GARY ERNST, Stanford University NORMAN H. FOSTER, Independent Petroleum Geologist, Denver FREEMAN GILBERT, University of California, San Diego PERRY R. HAGENSTEIN, Resource Issues, Inc. HARRISON C. JAMISON, Consultant, Sunriver, Oregon THOMAS H. JORDAN, Massachusetts Institute of Technology ANDREW H. KNOLL, Harvard University PHILIP E. LAMOREAUX, P. E. LaMoreaux and Associates, Inc. SUSAN LANDON, Thomasson Partner Associates, Denver CHARLES J. MANKIN, Oklahoma Geological Survey CAREL OTTE, JR., Unocal Corporation (retired) FRANK M. RICHTER, University of Chicago Staff THOMAS M. USSELMAN, Acting Staff Director KEVIN C. BURKE, Scholar-in-Residence WILLIAM E. BENSON, Senior Program Officer BRUCE B. HANSHAW, Staff Officer LORRAINE WOLF, Staff Officer LALLY A. ANDERSON, Staff Assistant CHARLENE ANDERSON, Administrative Secretary JUDITH ESTEP, Administrative Secretary

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Solid-Earth Sciences and Society COMMISSION ON GEOSCIENCES, ENVIRONMENT, AND RESOURCES M. GORDON WOLMAN (Chairman), The Johns Hopkins University PATRICK R. ATKINS, Aluminum Company of America PETER S. EAGLESON, Massachusetts Institute of Technology EDWARD A. FRIEMAN, Scripps Institution of Oceanography HELEN M. INGRAM, University of Arizona W. BARCLAY KAMB, California Institute of Technology GENE E. LIKENS, New York Botanical Garden SYUKURO MANABE, NOAA Geophysical Fluid Dynamics Laboratory JACK E. OLIVER, Cornell University FRANK L. PARKER, Vanderbilt University DUNCAN T. PATTEN, Arizona State University RAYMOND A. PRICE, Queen's University at Kingston MAXINE L. SAVITZ, Allied Signal Aerospace Company LARRY L. SMARR, University of Illinois, Urbana-Champaign STEVEN M. STANLEY, The Johns Hopkins University WARREN WASHINGTON, National Center for Atmospheric Research EDITH BROWN WEISS, Georgetown University Law Center IRVIN L. WHITE, Battelle Pacific Northwest Laboratories Staff STEPHEN RATTIEN, Executive Director STEPHEN D. PARKER, Associate Executive Director JEANETTE SPOON, Administrative Officer CARLITA PERRY, Administrative Associate ROBIN LEWIS, Senior Project Assistant

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Solid-Earth Sciences and Society The National Academy of Sciences is a private, nonprofit, self-perpetuating society of distinguished scholars engaged in scientific and engineering research, dedicated to the furtherance of science and technology and to their use for the general welfare. Upon the authority of the charter granted to it by the Congress in 1863, the Academy has a mandate that requires it to advise the federal government on scientific and technical matters. Dr. Frank Press is president of the National Academy of Sciences. The National Academy of Engineering was established in 1964, under the charter of the National Academy of Sciences, as a parallel organization of outstanding engineers. It is autonomous in its administration and in the selection of its members, sharing with the National Academy of Sciences the responsibility for advising the federal government. The National Academy of Engineering also sponsors engineering programs aimed at meeting national needs, encourages education and research, and recognizes the superior achievements of engineers. Dr. Robert M. White is president of the National Academy of Engineering. The Institute of Medicine was established in 1970 by the National Academy of Sciences to secure the services of eminent members of appropriate professions in the examination of policy matters pertaining to the health of the public. The Institute acts under the responsibility given to the National Academy of Sciences by its congressional charter to be an adviser to the federal government and, upon its own initiative, to identify issues of medical care, research, and education. Dr. Kenneth I. Shine is president of the Institute of Medicine. The National Research Council was organized by the National Academy of Sciences in 1916 to associate the broad community of science and technology with the Academy's purposes of furthering knowledge and of advising the federal government. Functioning in accordance with general policies determined by the Academy, the Council has become the principal operating agency of both the National Academy of Sciences and the National Academy of Engineering in providing services to the government, the public, and the scientific and engineering communities. The Council is administered jointly by both Academies and the Institute of Medicine. Dr. Frank Press and Dr. Robert M. White are chairman and vice chairman, respectively, of the National Research Council.

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Solid-Earth Sciences and Society Contents     EXECUTIVE SUMMARY   1     PRESENT STATE OF THE SOLID-EARTH SCIENCES   2     PRIORITIES   3     Priority Themes: Objectives and Research Areas   3     Selection of High-Priority Research Opportunities   3     PLANNING FOR THE FUTURE   4     Personnel Requirements   4     Education Requirements   4     Facilities and Equipment   5     Data Gathering and Handling   5     Funding for Priority Themes   8     Global Collaboration   8     RECOMMENDATIONS   9     Education Recommendations   9     Research Recommendations   9     General Recommendations   11 1   GLOBAL OVERVIEW   13     ESSAY ON THE EARTH SCIENCES   13     Living on Earth   13     Understanding the Earth   15     Predicting the Earth's Future   15     THE EARTH AND ITS COMPONENTS   16     UNIFYING FORCES IN THE GEOLOGICAL SCIENCES   18     Plate Tectonics   18     Images of the Earth   19     Variations in the Earth's Orbit   20     Humankind as a Geological Agent   20     GOALS OF THE EARTH SCIENCES: RESEARCH FRAMEWORK   20     Goal, Objectives, and Research Themes   21     Research Framework   22     Priority Theme Selection   23     PRIORITY THEMES: RESEARCH AREAS   26     Priority Theme A-I: Global Paleoenvironments and Biological Evolution   25     Priority Theme A-II: Global Geochemical and Biogeochemical Cycles   26     Priority Theme A-III: Fluids in and on the Earth   28     Priority Theme A-IV: Crustal Dynamics: Ocean and Continents   29     Priority Theme A-V: Core and Mantle Dynamics   32     PRIORITY THEMES: OBJECTIVES   34

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Solid-Earth Sciences and Society     Priority Theme B: Sustaining Resource Supplies   34     Priority Theme C: Preventing Damage from Geological Hazards   36     Priority Theme D: Assessing, Mitigating, and Remediating Effects of Environmental and Global Change   37     RESEARCH SUPPORT   39     Federal Funding   39     Industry Support of University Research   39     INSTRUMENTATION, COMPUTATIONAL CAPACITY, AND DATA MANAGEMENT   41     Facilities and Instruments   41     Data Handling   42     EDUCATION AND EMPLOYMENT   43     INTERNATIONAL SCOPE   44     ORGANIZATION OF THE REPORT   45 2   UNDERSTANDING OUR PLANET   47     ESSAY: THE DYNAMIC EARTH   47     ORIGIN OF THE EARTH   50     Comparative Planetology   51     Early Earth Evolution and Great Impacts   52     STRUCTURE AND DYNAMICS OF THE SOLID EARTH   53     Seismic Determinations of Earth Structure   53     Mantle Convection   56     Core Dynamics and Geomagnetism   57     Core-Mantle Boundary   58     EARTHQUAKES: CONSEQUENCES OF A DYNAMIC MANTLE   58     Geographic Distribution   58     Understanding Earthquakes   60     Earth Deformation   60     VOLCANIC ACTIVITY: CONSEQUENCE OF CONVECTING MANTLE   61     Geographic Distribution, Style, and Scale of Eruptions   62     Flow and Storage of Magma   62     Volcanic Eruptions   63     OCEAN BASIN PROCESSES   66     Ocean Spreading Centers,   66     Intraplate Volcanism: Hot Spots and Oceanic Plateaus   67     Plate Kinematics   69     Ocean Convergent Plate Boundaries: Island Arcs   69     CONTINENTAL STRUCTURE AND EVOLUTION   71     Seismic Imaging of the Crust   71     Mountain Building: Metamorphism and Deformation of Continents   73     Extensional Deformation of Continental Lithosphere   74     Evolution of the Continents   75     Sedimentary Basins   78     Continental Collision   78     Growth of the Continents Through Time   80     GEOCHEMICAL CYCLES   81     INTERACTION BETWEEN THE SOLID EARTH AND ITS FLUID ENVELOPES   83     RESEARCH OPPORTUNITIES   84     Research Area II: Global Geochemical and Biogeochemical Cycles   84     Research Area III: Fluids in and on the Earth   86     Research Area IV: Dynamics of the Crust and Lithosphere   86     Research Area V: Dynamics of the Core and Mantle   87     FACILITIES, EQUIPMENT, AND DATA BASES   88     BIBLIOGRAPHY   89

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Solid-Earth Sciences and Society 3   THE GLOBAL ENVIRONMENT AND ITS EVOLUTION   91     ESSAY   91     THE GLOBAL ENVIRONMENT: A GEOLOGICAL PERSPECTIVE   94     The Changing Land Surface   94     Beneath the Sea   100     CHANGE IN THE GLOBAL ENVIRONMENT   103     Cyclical Change in the Global Environment   103     Secular Change in the Global System   115     History of Life   120     Catastrophes in Earth History   127     MODELING THE EARTH SYSTEM   128     An Incomplete Record   128     Intellectual Frontiers   129     RESEARCH OPPORTUNITIES   132     Research Area I. Paleoenvironment and Biological Evolution   133     Research Area II. Global Geochemical and Biogeochemical Cycles   134     Research Area III. Fluids in and on the Earth   135     Research Area IV. Crustal Dynamics: Ocean and Continent   135     Facilities, Equipment, and Data Bases   135     BIBLIOGRAPHY   136 4   RESOURCES OF THE SOLID EARTH   137     ESSAY: NATURAL EXPLOITATION   137     ROCK-FLUID INTERACTIONS   140     WATER RESOURCES   141     Water Quality   143     Water Supply and Use   145     Influencing the Water Cycle   148     MINERAL RESOURCES   149     Understanding Mineral Deposits   152     Crustal Processes and Ore Deposits   153     Genetic Studies of Ore Deposits   155     Models in the Study of Mineral Deposits   156     Mineral Exploration and Exploitation   158     ENERGY RESOURCES   162     Petroleum Resources   163     Coal: An Abundant Fuel Resource   172     Sources of Energy from the Internal Engine   175     RESOURCE DEPENDENCY   177     RESEARCH OPPORTUNITIES   178     Water Resources   178     Mineral Resources   180     Energy Resources   181     Facilities, Equipment, and Data Bases   182     BIBLIOGRAPHY   183 5   HAZARDS, LAND USE, AND ENVIRONMENTAL CHANGE   185     ESSAY: A FRACTION OF THE EARTH'S SURFACE   185     GEOMORPHIC HAZARDS   189     Landslides and Debris Flows   191     Land Subsidence   195     Floods   196     Coastal Fluctuation   196     TECTONIC HAZARDS   197     Earthquakes   197     Tsunami Hazards   208     Volcanic Hazards   210     HAZARDS OF EXTRATERRESTRIAL ORIGIN   213

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Solid-Earth Sciences and Society     PROBLEMS RELATED TO POPULATION CONCENTRATION   214     Engineered Structures   215     Use of Earth Materials   216     Tunnels and Underground Openings   216     Health Risks from Geological Material   217     Agriculture   219     Soil Development and Soil Degradation   220     Waste Management   220     Contaminated Water, Air Pollution, and Acid Rain   222     GLOBAL CHANGE   223     Understanding Global Change   224     Mitigation and Remediation   224     Three Roles for the Solid-Earth Scientist   225     RESEARCH OPPORTUNITIES   225     Objective C: To Mitigate Geological Hazards   226     Objective D: To Minimize Perturbations from and Adjust to Global and Environmental Change   230     BIBLIOGRAPHY   231 6   ENSURING EXCELLENCE AND THE NATIONAL WELL-BEING   233     ESSAY   233     ROLES, NUMBERS, AND BACKGROUNDS OF SOLID-EARTH SCIENTISTS   237     Solid-Earth Sciences and National Security   237     Demographic Characteristics of Solid-Earth Scientists   238     Future Demand for Solid-Earth Scientists   240     EDUCATION IN THE SOLID-EARTH SCIENCES   242     Formal Education in the Solid-Earth Sciences   244     Public Awareness of the Earth Sciences   247     Coping with the Supply of Solid-Earth Scientists   247     INSTRUMENTATION AND FACILITIES   248     Global Positioning System   248     Digital Seismology   249     Instrumentation in Earth Science Laboratories   249     DATA GATHERING AND HANDLING   252     The Digital Data Revolution   253     Improving Data Management   254     GLOBAL COLLABORATION   255     International Collaborative Activities   255     U.S. Collaborative Activities   258     Other Nations' Activities   261     Proposed Programs   262     RECOMMENDATIONS   263     Education in the Solid-Earth Sciences   263     Instrumentation and Facilities   264     Data Gathering and Handling   264     Global Collaboration   266     BIBLIOGRAPHY   267 7   RESEARCH PRIORITIES AND RECOMMENDATIONS   269     INTRODUCTION   269     SETTING RESEARCH PRIORITIES   270     Planning and Decision Making   270     Individual and Group Research   271     Peer Review and Evaluation   272     Evaluation Criteria and Prioritization   273     PREVIOUS RECOMMENDATIONS AND INITIATIVES   274

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Solid-Earth Sciences and Society     GOALS, RESEARCH AREAS, OBJECTIVES, AND RESEARCH OPPORTUNITIES   276     PRIORITY THEMES AND RESEARCH SELECTIONS   277     Selection of Top- and High-Priority Research   277     Priority Theme I: Global Palcoenvironments and Biological Evolution   283     Priority Theme II: Global Geochemical and Biogeochemical Cycles   286     Priority Theme III: Fluids in and on the Earth   287     Priority Theme IV: Crustal Dynamics—Ocean and Continents   290     Priority Theme V: Core and Mantle Dynamics   293     Priority Theme B: To Sustain Sufficient Natural Resources   295     Priority Theme C: To Mitigate Geological Hazards   299     Priority Theme D: To Minimize and Adjust to the Effects of Global and Environmental Changes   300     RESEARCH IMPLEMENTATION: FACILITIES, EQUIPMENT, AND DATA NEEDS   302     Space-Based Instruments and Programs   303     Aircraft-Based Instruments and Programs   305     Land-Surface-Based Instruments and Programs   305     Sea-Surface-Based Instruments and Facilities   306     Laboratory Instrumentation and Facilities   307     Data Collection and Storage   307     FINANCIAL SUPPORT OF PRIORITY RESEARCH   309     Current Agency Expenditures   309     Industry Support of University Research   309     Suggestions for Future Funding   311     RECOMMENDATIONS   311     Education Recommendations   311     Research Recommendations   312     General Recommendations   314     BIBLIOGRAPHY   317 APPENDIX A     319 APPENDIX B     330     INDEX   340

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Solid-Earth Sciences and Society Preface The Committee on Status and Research Objectives in the Solid-Earth Sciences was charged by the Board on Earth Sciences and Resources with preparing a comprehensive and critical review of the current state of the science, to identify opportunities for research during coming decades, and to consider the issue of establishing priorities. The study was supported by a major grant from the W. M. Keck Foundation of Los Angeles, together with grants from the G. Unger Vetlesen Foundation of New York, and the National Academy of Sciences' Arthur L. Day Fund and Maurice Ewing Earth and Planetary Science Fund. In addition, the following scientific societies provided support: American Association of Petroleum Geologists; American Institute of Professional Geologists; American Geological Institute; Association of American Geographers; Association of American State Geologists; Association of Earth Sciences Editors; Geological Society of America; Society of Economic Geologists, Inc.; Society for Sedimentary Geology/SEPM; and Society of Vertebrate Paleontology. No funds for the study were specifically requested from federal agencies. COMMITTEE PROCESS The committee began its work with a series of meetings during the summer of 1988 to plan its approach and to initiate the study. There was a conscious decision to organize the report around two principal themes: (1) basic understanding of solid-earth processes and their interaction with other parts of the earth system and (2) societal issues in which the solid-earth sciences provided significant information in the decision-making process. There was no attempt to organize the study on a disciplinary basis or to review the appropriateness of specific federal agency programs. The committee formed 21 panels to help synthesize the vast body of earth science knowledge on specific societal issues or related to a few subdisciplines. The panels and their membership are included in Appendix B;

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Solid-Earth Sciences and Society over 150 earth scientists were involved in this process. The panels, through several individual meetings, produced draft reports that provided a major input to the report. Because of differences in approach and content among the panel reports, there are no plans to issue those draft materials. In addition to input provided by individual committee members and drafts from the panels, the committee was aware of the findings and conclusions of the many recent reports produced by the National Research Council, by various federal agencies, and by other consortia and planning groups. These are listed as a bibliography at the end of the appropriate chapters. These materials provided a second major input to the committee's deliberations. As many of the committee and panel members had participated in preparing one or more of these previous reports and long-range plans, this experience helped to put the discussions and the possibilities in a broad and informed perspective. Input from other members of the earth science community was sought in several ways. A questionnaire about priorities in the earth sciences was distributed to the councils of 40 national societies representing the spectrum of the pure and applied earth sciences. A written solicitation for suggestions was published in EOS, and a letter was widely circulated to individual scientists from society membership lists and through chairmen of earth science and selected engineering departments in North American universities. Eighty-three responses were received. Presentations of the work of the committee were made at three national meetings: a lecture at the Geological Society of America in 1989, and focused symposia at the American Association for the Advancement of Science's annual meeting in 1990 and the American Geophysical Union's meeting in spring 1990. Open discussion sessions were held at the latter two symposia. When writing was under way, many individual earth scientists were approached to provide a paragraph or page on specific topics that were not covered adequately through the other input processes. The committee held a series of meetings and workshops to consider the various inputs and to design the report. Several editorial subgroups were formed; these subgroups held several meetings and prepared drafts of the specific chapters, largely from the source materials. The draft chapters were circulated to the full committee for comment. Based on the comments, revisions were made and redistributed to the committee. At a final workshop, the committee discussed the report as a whole and reached consensus on the various priorities. The committee's overall approach was to determine the most important earth processes and then to consider what methods and facilities would be most effective in providing answers to the process-oriented problems. The committee recognized that in a field as diverse as the solid-earth sciences research must advance on a broad front. In preparation for, and during the final workshop in October 1991, the committee members reviewed a draft of the report and selected a top-priority research topic in each of eight areas, together with supporting research programs and the infrastructure required for implementation of the programs.

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Solid-Earth Sciences and Society STRUCTURE OF THE REPORT This report covers the workings of the whole Earth, concentrating on solid-earth processes and their influence on and interactions with human society. The table below illustrates the report's structure, which consists of seven chapters following the Executive Summary. A global overview of the present status of the solid-earth sciences is presented in the first chapter. The second chapter deals with the processes on Earth that are driven by internally generated heat; it includes some discussion of plate tectonics, volcanoes, earthquakes, the origin and history of the continents, and where research is going in all those areas. The third chapter complements the second by addressing two processes driven by the solar energy that falls on the surface—erosion and deposition—and portrays how they have operated since the beginning of earth history. It also tells the story of life on Earth and of its evolution as revealed by fossil Chapter Executive Summary   1 Essay Global Overview   2 Essay Understanding Our Active Planet Research Opportunities 3 Essay The Global Environment and Its Evolution (near-surface processes) Research Opportunities 4 Essay Resources of the Solid-Earth (water, minerals, fuels) Research Opportunities 5 Essay Hazards, Land Use, and Environmental Change Research Opportunities 6 Essay Ensuring Excellence and the National Well-Being Recommendations 7 Research Priorities and Recommendations Recommendations Appendix A Data Base of Federal Programs and Their Budgets   organisms, including such issues as catastrophic extinction. The fourth chapter treats resources—land, water, and mineral deposits, including metals, oil, gas, and coal—in light of the two previous chapters. The fifth chapter deals with hazardous phenomena such as earthquakes, volcanoes, and unstable land surfaces. It also describes how human beings interact with the Earth, changing its environment both locally, as in urban pollution, and globally, as in the composition and temperature of the ocean or atmosphere. The sixth chapter looks at how the solid-earth sciences are practiced, where research is going, what demographic changes are happening, the nature of changes in instrumentation and data handling, and the international role of the solid-earth sciences. The seventh chapter summarizes the goals of the solid-earth sciences, the research opportunities, the facilities required, and the priorities and ends with a list of recommendations. Each chapter is introduced by an essay. At the ends of Chapters 2 through 5, specific research opportunities related to the topics addressed are summarized in a research framework. At the ends of Chapter 6 and 7, recommendations are listed. These front and back portions of each chapter are shaded in the table, and highlighted in the report. Appendix A

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Solid-Earth Sciences and Society gives information on the budgets of federal government research programs. There are several different ways to sample the report: The Executive Summary conveys the essentials. The Executive Summary and Chapter 1 give a global overview of the whole volume. The shaded essays provide the essence of each chapter without the detail. The shaded research opportunities outline important research without the detailed background. Chapter 7 gives a detailed discussion of opportunities and priorities. The bodies of Chapters 2 through 6 provide a more technical treatment of the fields.

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Solid-Earth Sciences and Society SOLID-EARTH SCIENCES AND SOCIETY

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