ALBERT

Description / Table of Contents: Fracture in structural materials remains a vital consideration in engineering systems, affecting the reliability of machines throughout their lives. Impressive advances in both the theoretical understanding of fracture mechanisms and practical developments that offer possibilities of control have re-shaped the subject over the past four decades. The contributors to this volume, including some of the most prominent researchers in the field, give their long-range perspectives of the research on the fracture of solids and its achievements. The subjects covered in this volume include: statistics of brittle fracture, transition of fracture from brittle to ductile, mechanics and mechanisms of ductile separation of heterogenous solids, the crack tip environment in ductile fracture, and mechanisms and mechanics of fatigue. Materials considered range from the usual structural solids to composites. The chapters include both theoretical points of view and discussions of key experiments. Contributors include: from MIT, A.S. Argon, D.M. Parks; from Cambridge, M.F. Ashby; from U.C. Santa Barbara, A.G. Evans, R. McMeeking; from Glasgow, J. Hancock; from Harvard, J.W. Hutchinson, J.R. Rice; from Sheffield, K.J. Miller; from Brown, A. Needleman; from the Ecole des Mines, A. Pineau; from U.C. Berkeley, R. O. Ritchie; and from Copenhagen, V. Tvergaard

Description / Table of Contents: This volume examines the processes responsible for sedimentation in modern glacimarine environments, and how such modern studies can be used as analogues in the interpretation of ancient glacimarine sequences. Sediments released from glaciers grounded in tidewater, floating ice shelves, ice tongues, icebergs and sea ice form complex sequences governed by glaciological, oceanographic, sedimentary and biogenic controls. Ten per cent of the world’s oceans and epicontinental seas contain such active glacimarine environments, but during Cenozoic glacial periods this area was doubled. This book will, therefore, be of relevance to all scientists concerned with high and middle latitude marine environments. The early chapters are concerned largely with processes of sedimentation in modern glacimarine environments; examples are drawn from Alaska, the Canadian Arctic, Svalbard and Antarctica. Studies of ancient sequences, both Cenzoic and pre-Cenozoic, from the Barents Sea, Greenland, Sweden, Alaska and the northwest European continental shelf, form the latter part of the book.

Description / Table of Contents: Chapter 1. Primitive Solar Nebula --- Evolution of Magnetized Dense Clouds / T. Nakano, T. Nakamura, T. Terasawa, and Y. Sano / pp. 1-28 --- Molecular Outflows—Observational Signature for the Earliest Phase of Stellar Evolution— / Y. Fukui, A. Mizuno, H. Ogawa, and K. Kawabata / pp. 29-45 --- Observational Evidence of Transition between Protostellar Objects and T Tauri Stars / S. Sato / pp. 47-57 --- Jet Formation and Enhanced Accretion due to Magnetic Effects in Protostellar Objects / Y. Uchida / pp. 59-77 --- Shear Instability of the Solar Nebula / M. Sekiya, S. M. Miyama, and Y. Nakagawa / pp. 79-88 --- Magnetic Fossil of the Solar Nebula Observed in Meteorites / T. Nagata / pp. 89-103 --- Experimental Demonstration of Formations of Tetrataenite and Pyrrhotite / C. Kaito and Y. Saito / pp. 105-112 --- Synthesis of Carbonaceous and Siliceous Materials / A. Sakata and S. Wada / pp. 113-127 --- Chapter 2. Origin of Giant Planets --- Scenario of Formation Processes of the Giant Planets / H. Oya / pp. 129-134 --- Giant Planetary Systems—A Review— / H. Oya / pp. 135-193 --- Accumulation of Materials for the Formation of the Giant Planets—Ring Model under the Flow-out Motion of Disc Gas— / H. Oya / pp. 195-220 --- Nonlinear Evolution of the Accumulation Processes of the Material for Formation of the Giant Planets in the Primeval Solar System / H. Oya and M. Iizima / pp. 221-240 --- Simulation Studies on the Formation Processes of the Saturnian Ringlets / H. Oya, M. Miyauchi, T. Imai, and M. Iizima / pp. 241-164 --- Chapter 3. Origin of the Terrestrial Planets --- Elementary Processes in Planetary Accretion / K. Nakazawa, S. Ida, and K. Ohtsuki / pp. 265-280 --- Experimental Simulation of Collisions / A. Fujiwara, A. Nakamura, M. Kato, and Y. Takagi / pp. 281-295 --- Scaling Law on Impact Phenomena / H. Mizutani / pp. 297-317 --- Numerical Simulation of Planetary Growth / M. Hayakawa and H. Mizutani / pp. 319-340 --- Deformation of Porous Ice-Rock Mixtures and an Application to the Densification of Icy Satellites / N. Maeno, M. Arakawa, and J. Leliwa-Kopystynski / pp. 341-353 --- Chapter 4. Origin of Meteorites --- Precise Determination of the Age of Formation of Meteorites / K. Takahashi and A. Masuda / pp. 355-373 --- Chemical Differentiation during Collision and Accretion of Meteorite Parent Bodies / H. Takeda / pp. 375-394 --- Isotope Variations of Light Elements in Chondrites—Ion Microprobe Studies— / C. Uyeda, H. Nishimura, and J. Okano / pp. 395-408 --- Trace Element Fractionation during the Formation of Chondrules / N. Nakamura / pp. 409-425 --- Vaporization and Condensation of Chondritic Materials—Experimental Studies— / H. Nagahara, 1. Kushiro, and B. O. Mysen / pp. 427-446 --- Metamorphic Processes in New CI Carbonaceous Chondrites from Antarctica: Mineralogy and Petrology / K. Tomeoka / pp. 447-464 --- Evolution and Alteration Process of the CM Carbonaceous Chondrites / H. Kojima and K. Yanai / pp. 465-477 --- Structure and Chemistry of Carbon in Meteorites / T. Murae, H. Kagi, and A. Masuda / pp. 479-501 --- Chapter 5. Origin and Evolution of the Terrestrial Atmosphere --- 244Pu Fission Xe in the Mantle and Mantle Degassing Chronology / M. Ozima, S. Azuma, S. Zashu, and H. Hiyagon / pp. 503-517 --- The Noble Gases in the Venusian Atmosphere and the Fukutomi Chondrite / N. Takaoka / pp. 519-526 --- Formation of Atmospheres of Terrestrial Planets from Volatiles in Solid (Meteoritelike) Material / N. Sugiura / pp. 527-543 --- Early Evolution of the Terrestrial Planets: Accretion, Atmosphere Formation, and Thermal History / T. Matsui / pp. 545-559 --- Existence of Life and Creation of Atmospheric Environment / S. Moriyama / pp. 561-577 --- Chapter 6. Exploration of the Solar System—Halley Mission— --- Interaction of Plasma of Halley's Comet with the Solar Wind / H. Oya / pp. 579-614 --- Plasma Environment of Comet Hally Observed by Suisei / T. Terasawa and S. Takahashi / pp. 615-628 --- Modelling Study of the Cometary Ly α Brightness from a Time-varying H2O Source / O. Ashihara / pp. 629-643 --- Cometary Dust / T. Mukai / pp. 645-662 --- The Origin of Comets as Viewed from the Gaseous Composition / T. Yamamoto / pp. 663-677

Description / Table of Contents: PREFACE There are problems, when applying statistical inference to the analysis of data, which are not readily solved by the inferential methods of the standard statistical techniques. One example is the computation of confidence intervals for variance components or for functions of variance components. Another example is the statistical inference on the random parameters of the mixed model of the standard statistical techniques or the inference on parameters of nonlinear models. Bayesian analysis gives answers to these problems. The advantage of the Bayesian approach is its conceptual simplicity. It is based on Bayes' theorem only. In general, the posterior distribution for the unknown parameters following from Bayes' theorem can be readily written down. The statistical inference is then solved by this distribution. Often the posterior distribution cannot be integrated analytically. However, this is not a serious drawback, since efficient methods exist for the numerical integration. The results of the standard statistical techniques concerning the linear models can also be derived by the Bayesian inference. These techniques may therefore be considered as special cases of the Bayesian analysis. Thus, the Bayesian inference is more general. Linear models and models closely related to linear models will be assumed for the analysis of the observations which contain the information on the unknown parameters of the models. The models, which are presented, are well suited for a variety of tasks connected with the evaluation of data. When applications are considered, data will be analyzed which have been taken to solve problems of surveying engineering. This does not mean, of course, that the applications are restricted to geodesy. Bayesian statistics may be applied wherever data need to be evaluated, for instance in geophysics. After an introduction the basic concepts of Bayesian inference are presented in Chapter 2. Bayes' theorem is derived and the introduction of prior information for the unknown parameters is discussed. Estimates of the unknown parameters, of confidence regions and the testing of hypotheses are derived and the predictive analysis is treated. Finally techniques for the numerical integration of the integrals are presented which have to be solved for the statistical inference. Chapter 3 introduces models to analyze data for the statistical inference on the unknown parameters and deals with special applications. First the linear model is presented with noninformative and informative priors for the unknown parameters. The agreement with the results of the standard statistical techniques is pointed out. Furthermore, the prediction of data and the linear model not of full rank are discussed. A method for identifying a model is presented and a less sensitive hypothesis test for the standard statistical techniques is derived. The Kalman-Bucy filter for estimating unknown parameters of linear dynamic systems is also given. Nonlinear models are introduced and as an example the fit of a straight line is treated. The resulting posterior distribution for the unknown parameters is analytically not tractable, so that numerical methods have to be applied for the statistical inference. In contrast to the standard statistical techniques, the Bayesian analysis for mixed models does not discriminate between fixed and random parameters, it distinguishes the parameters according to their prior information. The Bayesian inference on the parameters, which correspond to the random parameters of the mixed model of the standard statistical techniques, is therefore readily accomplished. Noninformafive priors of the variance and covariance components are derived for the linear model with unknown variance and covariance components. In addition, informative priors are given. Again, the resulting posterior distributions are analytically not tractable, so that numerical methods have to be applied for the Bayesian inference. The problem of classification is solved by applying the Bayes rule, i.e. the posterior expected loss computed by the predictive density function of the observations is minimized. Robust estimates of the standard statistical techniques, which are maximum likelihood type estimates, the so-called M-estimates, may also be derived by Bayesian inference. But this approach not only leads to the M-estimates, but also any inferential problem for the parameters may be solved. Finally, the reconstruction of digital images is discussed. Numerous methods exist for the analysis of digital images. The Bayesian approach unites some of them and gives them a common theoretical foundation. This is due to the flexibility by which prior information for the unknown parameters can be introduced. It is assumed that the reader has a basic knowledge of the standard statistical techniques. Whenever these results are needed, for easy reference the appropriate page of the book "Parameter Estimation and Hypothesis Testing in Linear Models" by the author (Koch 1988a) is cited. Of course, any other textbook on statistical techniques can serve this purpose. To easily recognize the end of an example or a proof, it is marked by a A or a t~, respectively. I want to thank all colleagues and students who contributed to this book. In particular, I thank Mr. Andreas Busch, Dipl.-Ing., for his suggestions. I also convey my thanks to Mrs. Karin Bauer, who prepared the copy of the book. The assistance of the Springer- Verlag in checking the English text is gratefully acknowledged. The responsibility of errors, of course, remains with the author.

Description / Table of Contents: This volume contains the proceedings of a symposium held at Freiburg im Breisgau, October 7-11, 1990. The symposium was sponsored mainly by the Deutsche Forschungsgemeinschaft (DFG), by the Geological Institute of the University of Freiburg, and by the International Association of Mathematical Geology. We thank these and all other sponsors of the meeting. The symposium whose participants came from more then twenty countries was the first international meeting dedicated entirely to geological applications of threedimensional computer graphics, a rapidly growing field of scientific visualization in geology. The selection of papers in this volume covers a wide range of methods developed in the last decade.

Description / Table of Contents: The present interest in sediments which are rich in organic matter results not only from their economic significance as potential oil and gas source rocks, but also from the fact that their deposition is the result of special environments. Subtle changes in the environmental conditions may result in great variations in the geochemical and petrographical characteristics of the organic matter. Therefore, the study of organic matter-rich sediments can provide a key to past sedimentary conditions. In addition, the elucidation of the depositional controls is of importance for oil and gas exploration strategies, for which the knowledge of source rock distribution and quality is critical. Furthermore, organic matter reacts extremely sensitive to changes in temperature during burial. The result of this sensitivity is the generation of volatile products such as carbon dioxide, water, nitrogen, oil and gas and a reorganization of the solid organic residue. Some of these changes are quantified as maturity parameters which can be used as calibration tools in basin modelling, i.e., in the modelling of temperature histories of sedimentary basins. The use of maturity parameters and other organic matter characteristics as indicators for diagenetic conditions and depositional processes is, however, restricted, if analyses are performed on outcrop samples, because weathering also affects organic matter.

Description / Table of Contents: PREFACE This monograph is a compendium of revised papers which were originally presented at the "Ron Mather Symposium on Four-Dimensional Geodesy", 28-31 March, 1989, held at the University of New South Wales, Sydney, Australia. The symposium had the enthusiastic support of the International Association of Geodesy and the Australian Academy of Sciences. The symposium served two purposes: to honour the achievements of the late Professor Ron S. Mather, the distinguished Australian geodesist who died in 1978, and to review and report on the latest developments in four-dimensional geodesy. Four-dimensional geodesy is a convenient term for those geodetic principles and techniques which yield position, gravity and their time variations. In the past geodesists have tended to think of the earth as a static body, save from occasional savage earthquakes or volcanic eruptions. So, why the need to coin the term "four-dimensional geodesy") Because it explicitly recognises that time is an integral part of understanding geodetic measurements. But let's first identify the scope of modern geodesy. Geodesy has traditionally been concerned with two separate, though closely related, topics: accurate positioning of objects on the earth's surface, and mapping the earth's external gravity field. These are still the fundamental tasks of geodesy, although the spheres of application have now extended into space. However, present and emerging geodetic measurement technologies for gravity field mapping and positioning are sensitive to defolTnations of the earth's surface and gravity field. Within the geodetic community, this new emphasis on accounting for the time-varying characteristics of position and gravity has fundamental principles; in particular the establishment and maintenance of appropriate global reference systems for geodesy. At the same time, there has been a growing recognition by the earth sciences in general of the important role of geodesy in studying earth deformations, as well as atmosphere and ocean dynamic phenomena. The geodetic measurements, for example, are taken over time scales of hours to decades, and occasionally to a century or longer. Though this is only a small part of the whole deformation spectrum, it is a very important one. Geodesy bridges the low frequency part of the spectrum available from geological observations, with the high frequency end observed from, for example, seismic instrumentation. It's role in atmospheric and oceanographic studies is as a unique, high precision remote sensing tool. The revolution in geodesy is not, however, restricted to the measurement technology only. It is true that without the advances of space geodesy and terrestrial metrology, the notion of four-dimensional geodesy is a rather academic one. These advances, which now reveal time-variable signals above the measurement noise level, have important implications for all geodetic activities. The geodetic activities we refer to can be identified as: experiment design and measurement processes; definition and maintenance of highly stabie geodetic reference systems; data analysis; and interpretation of position and gravity results. Ultra high precision measurements are of little use without sophisticated analysis tools to extract the small signals in the data. The interpretation of geodetic results will be in error if insufficient attention is paid to ensuring that the reference systems to which the results relate are themselves stable. Clearly four-dimensional geodesy is as much about concepts and principles, as about computers and geodetic equipment. This diversity is reflected in the papers selected for this book. They range over topics related to the modem measurement tools, the reduction and analysis techniques, to the interpretation of geodetic results within the context of problems currently being investigated in the earth sciences. We would like to thank the International Association of Geodesy and the Australian Academy of Sciences for sponsorship of the Symposium. Unisearch Ltd., the commercial arm of the University of New South Wales, was the managing agent, and staff members of the School of Surveying and of Unisearch Ltd. were involved in the organisation of the Symposium. We would like to gratefully acknowledge these excellent contributions. Let us express also our gratitude for the useful guidance which we received from Prof. K. Lambeck, A. Prof. A. Stolz and Dr. R. Coleman of the Scientific Advisory Committee and the continuous support given by Prof. E.W. Grafarend. Sincere thanks are due to the authors of the selected papers for agreeing to contribute to this Monograph, and for their positive cooperation during the production of this volume.

Description / Table of Contents: PREFACE This volume contains a selection of papers presented and discussed at the COMTAGWorkshop on "Dynamics and Geomorphology of Mountain Rivers". COMTAG (Commission on Theory, Measurement and Application in Geomorphology) is a commission of the International Geographical Union (IGU). The meeting was held in the monastery of Benediktbeuern in the Bavarian Alps in June 1992. The main objective of the meeting was to review the most recent developments in research on river bed dynamics and bedload transport in mountain rivers. Questions of mountain torrent control and environmental protection were also addressed. The general theme of the meeting finds its appropriate scientific and spatial location in the long tradition of bedload transport studies carried out in the fluvially active German Alps, which are often affected by flood and mass movement hazards. The conference provided an impulse for discussions between researchers in the fields of mountain torrent hydrology, water resources management and bedload transport modelling. In the five years preceding the meeting the editors of this volume had headed a DFG (Deutsche Forschungsgemeinschaft) project on "Bedload transport and river bed adjustment in the Lainbach catchment" within the priority programme "Fluvial Geomorphodynamics in the late Quaternary". Results of the investigations and newly developed measurement techniques were introduced to the participants during the meeting and an excursion to the nearby Lainbach River. The meeting was attended by sixty four scientists from fifteen countries. Thirty four papers were presented in sessions on bedload transport in mountain torrents, measurement techniques of solid material transport, mass movements and sediment supply, river bed adjustment and roughness characteristics of steep mountain torrents, models of bedload transport, and catastrophic flooding. From a regional perspective the majority of the contributions dealt with the Alps with a special focus on investigations carried out at the northern fringe of the Alps. Most of the papers presented were submitted for publication, and selected papers have been included in this volume. The workshop was financially supported by the Deutsche Forschungsgemeinschaft, the Commission of the European Communities (Directorate General for Science, Research and Development), the Freistaat Bayern (Ministerium fOr Unterricht, Kultur, Wissenschaft und Kunst) and the US-Army Research and Development Standardization Group. The participants and the organizers are grateful for these grants. We thank the president of COMTAG, Asher Schick, for his friendly support during the preparation and organization of the workshop. We are also very much indebted to the Kathoiische Stiftungsfachhochschule M~nchen and the Salesianer Don Bo~cos, Benediktbeuern, who opened the rooms of the monastery of Benedikbeuern for scientific sessions and social events during the conference. The organization of the meeting would not have been possible without the help of the local and regional administration, water and forest authorities. We highly appreciate this assistance. In addition, the editors thank the Springer-Verlag for the inclusion of the conference proceedings in this series and the colleagues F. Ahnert, J. Bathurst, W. Bechteler, I. Campbell, P. Carling, N.J. Clifford, S. Custer, T. Davies, A. Dittrich, R. Ferguson, K. Garleff, M. Hassan, R. Hey, H. Ibbeken, J. Karte, H. Keller, D. Knighton, J. Laronne, M. Meunier, M.D. Newson, D. Oostwoud-Wijdenes, I. Reed, K.S.Richards, A. Scheidegger and W. Symader for their valuable contributions as reviewers of the manuscripts that were submitted for this volume.

Description / Table of Contents: INTRODUCTION Ecometry concerns measurements and interpretation of ecological data and relationships between data. It deals with most matters involved in the scientific aspects of the representativity and information value of samples and does not, in fact, concern statistical methods. In particular, ecometry can be regarded as an approach to obtain so-called load models and load diagrammes (effect-dose-sensitivity diagrammes), which are one of the aims/final products in aquatic environmental consequence analysis (H~- kanson, 1990; all these terms will be explained later on). This publication is meant to demonstrate what can and cannot be done using ecometric approaches. It must be emphasized at the outset that the main intention here is not to provide new radioecological knowledge on how Cs-137 is dispersed in aquatic ecosystems after the Chernobyl accident and is taken up in fish, but to use Cs-137 as a type substance and pike as a biological indicator to go through methods which should also apply to other types of environmentally hazardous substances (it could just as well have been substance X in ecosystem Y). As a secondary effect, we may also learn something about Cs-137. Several terms and methods, which have not been used earlier in the aquatic environmental sciences, e.g., ecometric analysis and dynamic modelling using moderators, will be discussed and defined...

Description / Table of Contents: PREFACE Following the economical and social development of the local communities, mountain regions of temperate climates are increasingly becoming the site of valuable infrastructures and important urban and industrial settlements. As the catastrophic events of last years in the European Alps have clearly shown, the vulnerability of these territories has correspondingly increased, in terms of both property damage and losses of human life. Until recently, the hydraulic scientific community has paid little attention to mountain watersheds, except perhaps during the period if the hydropower development. Nevertheless attention was then focused on problems and methodologies somewhat different from the issues of actual environmental concern. More recently, however, hydraulic engineers have joined their colleagues from forest and rural engineering, who have traditionally dealt with erosion control in mountain areas, to bring in their own methodology, already experienced in lowland rivers. At the same time, academic people focused an interest in some phenomena, like massive transport, which is typical of mountain environment. To bring together all these contributions and to make the state of the art of the mountain river science (oropotamology) and technology, an International Workshop was called at the University of Trent (Italy), on October 1989, under the sponsorship of Fluvial Hydraulic Section of the IAHR. Three main topics have been recognized as particularly relevant from the point of view of both research and professivnal people: a) Hydrodynamics of steep channels and local scale process; b) Sediment movement and sediment training, with special emphasis on massive transport; c) Particular features of sediment transport related to non-uniform grain-size. However, as it is the case in these circumstances, the contest of several contributions often spread over more than one topic. In the following Introduction to papers, the three topics were split into 11 Sections, each one devoted to a more particular aspect recurrently addressed during the discussion. The same paper, thus, may be mentioned in different Sections of the Introduction.

Description / Table of Contents: PREFACE This volume presents results from members of the Project 216 "Global Biological Events in Earth History" of the International Geological Correlation Programme (IGCP). The project, initiated by the elder editor (O.H.W.) within the framework of the International Palaeontological Association (IPA) in the late 70s, was officially established in 1984. Subsequently, it led to the first three conferences on Global Bio-Events, and their respective symposia volumes: 1) In G6ttingen, West Germany in 1986 (WaUiser, O. H., Ed., 1986, Global Bio-Events, Springer-Verlag); in Bilbao, Spain in 1987 (Lamolda, M. A., Kauffrnan, E. G., and Walliser, O. H., Eds., 1988, Paleontology and Evolution: Extinction Events; Rev. Espafiola de Paleont., n. extraord.); and in Boulder, Colorado, U.S.A. in 1988 (this volume). The next meeting, on Innovations and Revolutions in the Biosphere, is planned in Oxford, England in 1990, to be hosted by Martin Brasier. During the history of this project, the focus of our research has shifted significantly. Initial focus was on specific global mass extinctions (e.g. the Precambrian/Cambrian, Frasnian/Fammenian, Cretaceous/Tertiary, and Eocene/Oligocene events) to a broader treatment of Phanerozoic mass extinctions, their differences or unifying factors, and their causal mechanisms. Subsequent meetings have attempted to focus attention on a fuller spectrum of global bio-events in Earth history. The Boulder Conference, and this volume, although still strongly influenced by the excitement of mass extinction research, expresses these new trends in bioevent studies. The Boulder conference, held on May 16-23, 1988, focused on a broad spectrum of Abrupt Changes in the Global Biota. Over 100 participants from 13 nations attended this meeting, representing diverse disciplines of palaeobiology, palaeoclimatology, palaeoceanography, sedimentology, geochemistry, and a broad spectrum of the stratigraphic and geological sciences. Four days of talks were supplemented by field trips to the continental Cretaceous/Tertiary boundary in the Raton Basin, New Mexico, and to the Cenomanian/Turonian mass extinction interval exposed near Pueblo, Colorado. The Conference itself was characterized by a great diversity of approaches to bio-event research, and the phenomenon of mass extinction. In particular, interactive causes involving both extraterrestrial and earthbound (tectonic, oceanographic, climatic) forces were discussed, and each major Phanerozoic mass extinction was treated by specialists in the field. In addition, many presentations focused on the causal mechanism and patterns of bio-event development that were not restricted to mass extinction intervals, but which could cause regional to global biotic response at any time in Earth history. Thus, both the conference, and this volume, focus attention on climatic and oceanic perturbations from anoxia, advection, rapid thermal change, toxic chemical enrichment, and energy shock from impacts and giant tsunamis as forcing mechanism for regional to global bio-events. The delicate balance of perched ocean/ctimate~fe systems under typical warm equable non-glacial Phanerozoic conditions, and their susceptibility to shock from even small perturbations, was a philosophical theme that ran throughout the meeting. The case for extraterrestrial forcing of tectonic, volcanic, and biological events was greatly strengthened by new data presented at this conference, with special concern for the effects of small comet/meteorite impacts in the oceans, and their chemical/physical/biological signature which might be used, in the absence of shocked minerals, microspheres or trace metals, to identify extraterrestrial events associated with global and regional bio-events. The conference benefitted from the introduction of much new data at high levels of resolution, especially from poorly studied mass extinction intervals. Interactive discussions, and many new ideas characterized the meeting. The new scientific results of this meeting are exciting; they are reviewed in the Conference Report published in Episodes (1988, v. 11, n. 4, p. 289-292). Most of the key papers presented at the Boulder meeting appear in this volume. What lies ahead in bio-event research? Clearly, a great deal of excitement and an age of discovery. We have only touched the surface of this new and dynamic field. We are starting to comprehend the dynamics of global mass extinctions, integrating detailed geochemical, physical and biological data into scenarios of cause and effect. But in the years ahead lies the job of understanding the whole spectrum of regional bioevents preserved in the ancient record, and especially the application of this research to solutions of the critical problems inherent in global change and the modern biotic crisis. Future directions for research at this conference include the investigation and modeling of abrupt chemical and thermal shifts in the ocean, the effects of impacts at deep ocean sites, the documentation of successful survival strategies and repopulation patterns following biotic crises, the deep ocean record of bio-events, and focus on alternative forces other than impacting to account for mass extinction events. This volume introduces some of these new pathways in bio-event research.

Description / Table of Contents: PREFACE The emergence of new information from drilling in deep-sea and coastal areas and the surfacing of the plate tectonics theory probably had the greatest impacts in recent decades on the highly accelerated growth of knowledge regarding the evolution of sediments and sedimentary rocks. Studies in recent years have also provided new insights on global sedimentary processes, and isotopic tools in many ways have enhanced our knowledge and have provided even an unexpected added dimension to the mechanisms of some specific processes. Many different uses of isotopic tools in studies of sedimentary processes can be found in the literature, but the information is highly scattered in the vast field of sedimentology. The disseminated state of existing isotopic knowledge on sedimentary systems has undoubtedly deprived many practitioners in the field to fully appreciate the benefits and limitations, and even the apparent confusion, concerning the use of isotopic tools. We have endeavored here to bring together discussions on some major sedimentary systems in the sedimentary cycle and to analyze them according to isotopic evidence. To accomplish such a task required contributions from many individuals. We were fortunate to have friends who accepted to share our goals. We most sincerely thank all the contributors to this book and deeply appreciate their patience and fortitude despite our undue demands on them to reach our objectives...

Description / Table of Contents: PREFACE The search for tin dates back to the earliest days of civilization. For about 40 years, world tin mining has oscillated at a level of 150,000-250,000 t Sn/year, with a mine output in 1989 of 210,000 t Sn (MCS 1990). This figure corresponds to a current annual value of about US$1.5 billion and places tin ninth on the metal market behind iron, gold, uranium, copper, zinc, silver, platinum and nickel. Tin deposits belong to the granite-related ore deposit spectrum which includes many metals vital to current and future technologies such as Cu, W, Mo, U, Nb, Ta, Ag, Au, Sb, Bi, As, Pb, Zn, REE, Be, Ga and Li. The granitic rocks associated with tin and tin-tungsten deposits have long been identified as a special group of granites, the so-called tin granites. These rocks provide a unique opportunity to study the magmatic and hydrothermal history of tin ore formation. Tin granites are more easily identifiable as parent rocks for tin (and tungsten) mineralization than is the case for other mineralized granitic rocks such as molybdenum and copper porphyries. The magmatic molybdenum and copper distribution patterns are more complex (control by sulfide solubilities), and commonly obliterated by fluid interaction. The relatively simple situation of tin granites provides therefore an invaluable opportunity to study some metallogenic aspects of magmatic-hydrothermal ore deposits in general. The present study attempts to develop a general metallogenic model for tin in identifying the essential or relevant processes in tin ore formation. The methodological principle is based, on an interplay between a background of some basic petrogenetic concepts and a number of specific local and regional data on tin deposits and tin provinces, with particular reference to those areas with which the author is most familiar with (Bolivia, SE Asia, Europe). This inductive approach condenses the many apparently specific complexities encountered in individual ore deposits to a few major processes of general importance. The inherent reductionism may have a personal bias which is probably inevitable in any simple and broad-scale picture ("Apr6s tout, la raison est bien I'esclave des passions"; Feyerabend 1979:210). The critical problem of the relevance of those factors chosen for our model can be judged by its degree of consistency and predictive capability for new and analogous cases...

Description / Table of Contents: Pages 1-13 / Maars of the Westeifel, Germany / G. Büchel --- Pages 15-60 / Syn- and post-eruptive mechanism of the Alaskan Ukinrek Maars in 1977 / G. Büchel, V. Lorenz --- Pages 61-80 / Maars and maar lakes of the Westeifel Volcanic Field / Jörg F. W. Negendank, Bernd Zolitschka --- Pages 81-94 / Maars of northern Auvergne (Massif Central, France): State of knowledge / E. Juvigné, G. Camus, A. de Goër de Herve --- Pages 95-107 / Palaeoenvironmental investigations on long sediment cores from volcanic lakes of Lazio (central Italy)—An overview / Maria Follieri, Donatella Magri, Biancamaria Narcisi --- Pages 109-116 / Geophysical mapping of organic sediments / Stefan Wende, Reinhard Kirsch --- Pages 117-118 / Preliminary uniboom survey of the Monticchio Lakes (southern Italy) / A. Stefanon --- Pages 119-128 / Sonar investigations in the Laghi di Monticchio (Mt. Vúlture, Italy) / Ralph B. Hansen --- Pages 129-148 / Climatic and tectonic effects on sedimentation in central Italian volcano lakes (Latium)—Implications from high resolution seismic profiles / F. Niessen, A. Lami, P. Guilizzoni --- Pages 149-161 / Sediments and basin analysis of Lake Schalkenmehrener Maar / T. Heinz, B. Rein, J. F. W. Negendank --- Pages 163-171 / Organic carbon contents of sediments from Lake Schalkenmehrener Maar: A paleoclimate indicator / B. Rein, J. F. W. Negendank --- Pages 173-194 / Basin analysis for selected time-frames using sedimentation rates in Lake Meerfelder Maar (Westeifel FRG) / F. Wegner, J. F. W. Negendank --- Pages 195-208 / Turbidites in the sediments of Lake Meerfelder Maar (Germany) and the explanation of suspension sediments / D. Drohmann, J. F. W. Negendank --- Pages 209-222 / Paleoclimate reconstruction at the Pleistocene/Holocene transition—A varve dated microstratigraphic record from Lake Meerfelder Maar (Westeifel, Germany) / D. Poth, J. F. W. Negendank --- Pages 223-235 / Paleoenvironmental reconstruction of the Late- and Postglacial sedimentary record of Lake Weinfelder Maar / A. Brauer, J. F. W. Negendank --- Pages 237-275 / Sedimentology and paleoenvironment from the Maar Lac du Bouchet for the last climatic cycle, 0-120,000 years (Massif Central, France) / Elisabeth Truze, Kerry Kelts --- Pages 277-288 / Lago Grande di Monticchio (southern Italy) a high resolution sedimentary record of the last 70,000 years / Bernd Zolitschka, Jörg F. W. Negendank --- Pages 289-304 / A multidisciplinary study of the Vico Maar sequence (Latium, Italy): Part of the last cycle in the Mediterranean area. Preliminary results / P. Francus, S. Leroy, I. Mergeai, G. Seret, G. Wansard --- Pages 305-316 / Environmental geology and geochemistry of lake sediments (Holzmaar, Eifwl, Germany) / B. G. Lottermoser, R. Oberhänsli, B. Zolitschka, J. F. W. Negendank, U. Schütz… --- Pages 317-332 / Geochemistry of Lago Grande di Monticchio, S. Italy / C. Robinson, G. B. Shimmield, K. M. Creer --- Pages 333-348 / Tephrochronology of core C from Lago Grande di Monticchio / Anthony J. Newton, Andrew J. Dugmore --- Pages 349-365 / A palaeomagnetic study of maar-lake sediments from the Westeifel / B. Haverkamp, Th. Beuker --- Pages 367-376 / Preliminary 50m palaeomagnetic records from Lac du Bouchet, Haute Loire, France / T. Williams, K. M. Creer, N. Thouveny --- Pages 377-392 / Palaeomagnetic investigations of Lago Grande di Monticchio, southern Italy / Ian Turton --- Pages 393-420 / Late-Glacial/Holocene changes of the climatic and trophic conditions in three Eifel maar lakes, as indicated by faunal remains. I. Cladocera / Wolfgang Hofmann --- Pages 421-433 / Late-glacial/Holocene changes of the climatic and trophic conditions in three Eifel maar lakes, as indicated by faunal remains. II. Chironomidae (Diptera) / Wolfgang Hofmann --- Pages 435-439 / Ostracoda (Crustacea) and trichoptera (Insecta) from Late-and Postglacial sediments of some European maar lakes / Burkhard W. Scharf --- Pages 441-446 / Oligocence dinoflagellate-cysts in Quaternary freshwater sediments of Eifel maars / H. Weiler --- Pages 447-465 / Tertiary maars of the Hocheifel Volcanic Field, Germany / G. Büchel, M. Pirrung --- Pages 467-476 / Some aspects of Cenozoic maar sediments in Europe: the source-rock potential and their exceptionally good fossil preservation / W. Zimmerle --- Pages 477-484 / Palaeoecological implications from the sedimentary record of a subtropical maar lake (Eocene Eckfelder Maar; Germany) / Bernd Zolitschka --- Pages 485-489 / Arthropods from the Eocene Eckfelder Maar (Eifel, Germany) as a source for paleoecological information / H. Lutz --- Pages 491-497 / Flowers from the Middle Eocene of Eckfeld (Eifel, Germany)— First results / H. Frankenhäuser, V. Wilde --- Pages 499-503 / Initial results on the importance of a flora from the Middle Eocene of Eckfeld (Eifel, W.-Germany) / V. Wilde, H. Frankenhäuser --- Pages 505-509 / International Maar Deep Drilling Project (MDDP) a challenge for earth sciences? / Jörg F. W. Negendank, Bernd Zolitschka

Description / Table of Contents: The present study will provide an introduction into the biomechanics of trees and will give a critical survey of the phylogeny and the constructional principles of the tree habit. Since the trunk is considered the basic and crucial element of a tree, the analysis is largely restricted to a functional comparison of the stem anatomy of the various tree forms. It is based on the concept of constructional morphology, thus considering simultaneously the functional aspect and the ontogenetical and phylogenetical development of the various trunk types. The main questions to be answered in this study are; Why do trees exist? - Which are the constructional principles of tree trunks and when and in which group of plants do they appear? - How important are internal (phylogenetic) and external (functional, constructional) constraints? - What are the specific properties of the different constructional principles and does a correlation between trunk design and growth habit exist? - Is there a tendency in phylogeny to a better performance? The study does not (and cannot) intend to provide a detailed biophysical analysis of individual cases because experimental data on the mechanical properties of the structural elements of the different kinds of trees are still lacking. Instead, it will he the task to evaluate in a comprehensive and qualitative or semi-quantitative manner the available data of the morphology, anatomy and phylogeny of fossil and recent trees by using concepts of biomechanics and constructional morphology. Thus a somewhat holistic approach is used, which is becoming increasingly more acceptable today.

Description / Table of Contents: PREFACE The application of thermal analysis to earth science has a long history. This is evidenced by the extensive coverages by Mackenzie (1957, 1970), Langier-Kuzniarowa (1967), Schultze (1971), Liptay (t973), Smykatz- Kloss (1974), Todor (1976) and Heide (1982). The chief thermal method has been differential thermal analysis (DTA). Additionally, thermogravimetry (TG; Duval, 1963; Keattch, 1969; Earnest, 1988) and thermodilatometry (Schomburg & Strörr, 1984) have gained some importance. All these methods are still widely ltsed. But recently several new techniques have gained attention, such as thermomagnetometry, thermomechanical analysis and thermosonimetry. Improved equipment made possible the application of thermal methods to problems in thermodynamics and kinetics (e.g. by means of differential scanning calorimetry, DSC). This progress in the construction of new instruments as well as the combination of existing methods to enable simultaneous determinations (e.g. TG/DTA; TG/IR spectroscopy; DTA/mass spectrometry; DTA/microscopy; high-pressure DTA) have led to a resurgence in the use and application of thermal analysis in the earth sciences. Here the applications cover such diverse areas as the examination of individual minerals, mineral mixtures, rocks, soils, ceramics, cements, raw materials as well as their industrial evaluation, performance assessment and quality control. In the field of solid fossil fuels thermal determinations range from proximate analysis of inorganic constituents and the measurement of calorific values to the assessment of the environmental aspects of fly ashes and mineral residues. To support this tendency, the International Confederation for Thermal Analysis (ICTA) has recently founded a "Committee for Thermal Analysis in Geosciences". The aim of this committee shall be to discuss, improve and distribute the knowledge about the possibilities of solving geoscientific questions by means of thermal analytic methods...

Description / Table of Contents: PREFACE Turbidity currents have been comprehensively studied in the past although much remains unknown about both their flow characteristics and resultant sedimentary deposits. Much of this uncertainty arises from the catastrophic nature of their formation which makes them difficult to study in the environment, and has resulted in the majority of studies being experimental or theoretical. Experiments have shown that reversals in the flow of density currents can be associated with the generation of internal solitary waves. This is in contrast to the belief held by many workers that the reversal of a turbidity current simply generates an identical flow travelling in the opposite direction. This book arose from the need for a detailed experimental study to examine the effects and to consider the consequences of density current reversals from a variety of obstructions to their flow. The first part of this book comprises a detailed review of literature covering the fluid dynamics and sedimentology relevant to the experimental study (chapter one). Chapter two presents the results from the comprehensive experimental programme which are discussed and compared with appropiate theoretical hypotheses. This permits the synthesis of a model for the general features of flows that result from the incidence of density currents upon obstructions to the flow. The application of this model to both modern and ancient turbidite systems is then discussed in chapter three. This book is suitable for earth scientists with an interest in the dynamics of turbidity currents. In addition, workers from other fields such as applied maths, meteorology and engineering who have an interest in density currents and bores in practical situations may find it useful...

Description / Table of Contents: INTRODUCTION The study is essentially empirical, since it portrays and appraises two different water management systems, and relates them to one another. Yet the analysis has also been made with definite research aims in mind. Its focus has been narrowed down to the environmental assessment of urban water management systems in arid and semi-arid regions, especially with an eye to deal with information problems in the Developing World. The study addresses a set of very critical issues of global concern, and, thus, delineates a crucial topic for international research. The fact that a wide range of critical issues usually complicates and aggravates the given problem setting provides the comparative analysis with a special practical incentive to explore the opportunities for joint strategies and comprehensive solutions. However, the complexities involved between water management and the environment and the relative lack of a joint theory in that field pose certain difficulties to such an undertaking. In order to fully appreciate the underlying purpose of the study and the scope of its implications, the various facets of the problem setting and the essential ingredients of the general line of approach have first to be unravelled and expounded at some length. Above all, it needs to be shown how these facets combine to produce the complex, burning issues which in turn seem to, both in theory and practice, require correspondingly intricate, strategic approaches for their solutions...

Description / Table of Contents: INTRODUCTION --- Shock Compression Chemistry of materials, Y. Horie and A. B. Sawaoka, pp. 3-22 --- 1.1 The Nature of Shock Waves, pp. 3-5 --- 1.2 Compaction of Powders and Shock Activation, pp. 6-9 --- 1.3 First-Order Phase Transitions and Chemical Reactions, pp. 10-12 --- 1.4 Time Scales and Interactions of Basic Mechanisms, p. 12 --- 1.4.1 Shock propagation in a particle assemblage, p. 12 --- 1.4.2 Energy localization, pp. 12-13 --- 1.4.3 Thermal relaxation of hot spots, p. 14 --- 1.4.4 Mass diffusion in solids, p. 14 --- 1.4.5 Kinetic constants, pp. 14-16 --- 1.5 Some Roles of Shock Compression Techniques in Material Sciences Study, p. 16 --- 1.5.1 Shock compression technique as a tool of high pressure production, p. 16 --- 1.5.2 Appearance of diamond anvil-type high-pressure apparatus, pp. 16-18 --- 1.5.3 New roles of shock compression technology as a unique method of very high temperature production, pp. 18-19 --- 1.5.4 Development of conventional hypervelocity impact techniques for precise measurement of materials under shock compression, pp. 19-21 --- FUNDAMENTALS OF SHOCK WAVE PROPAGATION --- Shock Compression Chemistry of materials, Y. Horie and A. B. Sawaoka, pp. 23-78 --- 2.1 Hydrodynamic Jump Conditions and the Hugoniot Curve, pp. 23-32 --- 2.2 Shock Transition in Hydrodynamic Solids, pp. 32-42 --- 2.3 Non-Hydrostatic Deformation of Solids, p. 42 --- 2.3.1 Elastic-ideally-plastic solids, pp. 42-53 --- 2.3.2 Experimental observations of elastic-plastic behavior, pp. 53-56 --- 2.4 Wave-body interactions, pp. 56-57 --- 2.4.1 Preliminaries, pp. 57-60 --- 2.4.2 Planar impact of similar and dissimilar bodies, pp. 60-61 --- 2.4.3 Shock wave interaction with material boundaries, pp. 61-64 --- 2.4.4 Wave-wave interactions, pp. 65-66 --- 2.4.5 Detonation wave and interaction with a solid surface, pp. 66-77 --- SHOCK COMPRESSION TECHNOLOGY --- Shock Compression Chemistry of materials, Y. Horie and A. B. Sawaoka, pp. 79-115 --- 3.1 Gun Techniques, p. 80 --- 3.1.1 Single stage gun, p. 80 --- 3.1.2 Conventional two stage light gas gun, pp. 80-83 --- 3.1.3 Velocity measurement of projectile, p. 83 --- 3.1.4 Magnetoflyer method, pp. 83-84 --- 3.1.5 CW x-ray velocity meter, pp. 84-86 --- 3.1.6 Measurement of interior projectile motion, pp. 86-87 --- 3.1.7 Recovery experiments, pp. 87-89 --- 3.2 Explosive Techniques, p. 89 --- 3.2.1 Plane shock wave generation and recovery fixture, pp. 89-91 --- 3.2.2 Numerical simulaation of shock compression in the recovery capsule, pp. 91-94 --- 3.2.3 Cylindrical recovery fixture, pp. 94-95 --- 3.3 In-situ Measurements, p. 95 --- 3.3.1 Manganin pressure gauge, pp. 95-98 --- 3.3.2 Particle velocity gauge, pp. 99-100 --- 3.3.3 Observations of multiple shock reverberations by using a manganin pressure gauge and particle velocity gauge, pp. 100-106 --- 3.3.4 Shock temperature measurement, pp. 106-111 --- 3.3.5 Copper-Constantan thermocouple as a temperature and pressure gauge, pp. 111-113 --- THERMOMECHANICS OF POWDER COMPACTION AND MASS MIXING --- Shock Compression Chemistry of materials, Y. Horie and A. B. Sawaoka, pp. 117-170 --- 4.1 A One Dimensional Particulate Model, pp. 117-123 --- 4.2 Continuum Models, p. 123 --- 4.2.1 Hydrodynamic models, pp. 124-141 --- 4.2.2 Continuum plasticity theory, pp. 141-148 --- 4.2.3 Application, pp. 148-154 --- 4.3 Particle Bonding and Heterogeneous Processes, pp. 154-160 --- 4.4 Mass Mixing, pp. 160-169 --- THERMOCHEMISTRY OF HETEROGENEOUS MIXTURES --- Shock Compression Chemistry of materials, Y. Horie and A. B. Sawaoka, pp. 171-225 --- 5.1 Thermodynamic Functions of Heterogeneous Mixtures, pp. 172-187 --- 5.2 Analytical Equations of State, pp. 187-191 --- 5.3 Hugoniots of Inert Mixtures, p. 191 --- 5.3.1 Thermodynamically equilibrium models, pp. 191-197 --- 5.3.2 Mechanical models, pp. 197-199 --- 5.4 First-Order Phase Transitions, pp. 199-206 --- 5.5 Chemical Equilibria, pp. 206-212 --- 5.6 Reaction Kinetics, p. 212 --- 5.6.1 Rate equations, pp. 212-214 --- 5.6.2 Nucleation, pp. 214-216 --- 5.6.3 Growth, pp. 216-217 --- 5.6.4 Pressure effects, pp. 217-218 --- 5.7 Shock-Induced Reactions in Powder Mixtures, pp. 218-224 --- HYDRODYNAMICAL CALCULATIONS --- Shock Compression Chemistry of materials, Y. Horie and A. B. Sawaoka, pp. 227-276 --- 6.1 Conservation Equations of Continuum Flow, pp. 227-228 --- 6.1.1 Mass conservation, pp. 228-230 --- 6.1.2 Conservation of linear momentum, pp. 230-231 --- 6.1.3 Enegy conservation, pp. 231-234 --- 6.2 Constitutive Modeling of Inorganic Shock Chemistry, pp. 234-235 --- 6.2.1 VIR model, pp. 235-239 --- 6.2.2 Pore collapse, p. 239 --- 6.2.3 Chemical kinetics, pp. 239-240 --- 6.2.4 Computational constitutive reactions, pp. 240-245 --- 6.3 Applications of the VIR Model, p. 245 --- 6.3.1 Shock wave profiles in Ni/Al powder mixtures, pp. 245-250 --- 6.3.2 Compaction of diamond with Si and graphite, pp. 250-257 --- 6.4 Continuum Mixture Theory and the VIR Model, p. 257 --- 6.4.1 Continuum mixture theory, pp. 257-263 --- 6.4.2 Derivation of the VIR model using the CMT, pp. 263-269 --- 6.4.3 A model of heterogeneous flow, pp. 269-275 --- SHOCK CONDITIONING AND PROCESSING OF CERAMICS --- Shock Compression Chemistry of materials, Y. Horie and A. B. Sawaoka, pp. 277-360 --- 7.1 Shock Conditioning of Powder of Inorganic Materials, p. 227 --- 7.1.1 Brief review of shock conditioning studies, p. 227 --- 7.1.2 Aluminum oxide powder, pp. 277-281 --- 7.2 Shock Synthesis of Inorganic Materials, p. 281 --- 7.2.1 Shock synthesis studies, p. 281 --- 7.2.2 High dense forms of carbon, pp. 281-285 --- 7.2.3 High dense forms of boron nitride, pp. 285-287 --- 7.2.4 Shock treatment of boron nitride powders, pp. 287-301 --- 7.3 Shock Consolidation of Ceramic Powders, p. 301 --- 7.3.1 Why non-oxide ceramics?, pp. 301-302 --- 7.3.2 Dynamic consolidation of SiC powders, pp. 302-304 --- 7.3.3 Approach to the fabrication of crack free compacts, pp. 304-305 --- 7.3.4 Shock consolidation of SiC powder utilizing post shock heating by exothermic reaction, pp. 305-310 --- 7.4 Dynamic Compaction of Zinc Blende Type Boron Nitride and Diamond Powders, p. 310 --- 7.4.1 Background, pp. 310-311 --- 7.4.2 Cubic boron nitride, pp. 311-318 --- 7.4.3 Diamond, pp. 318-326 --- 7.4.4 Diamond composites obtained by utilizzing exothermic chemical reaction, pp. 326-332 --- 7.5 Very High Pressure Sintering of Shock Treated Powders, pp. 332-334 --- 7.5.1 Silicon nitride, pp. 334-336 --- 7.5.2 w-BN, pp. 336-346 --- 7.6 Rapid Condensation of High Temperature Ultrasupersaturated Gas, p. 346 --- 7.6.1 Silicon nitride, pp. 346-352 --- 7.6.2 Carbon, pp. 352-357

Description / Table of Contents: Introduction / Pages 1-32 --- Interpretation using nomograms / Pages 33-47 --- Linear parameters / Pages 49-114 --- Non-linear parameters / Pages 115-173 --- Maximum likelihood and maximum entropy / Pages 175-193 --- Analytic inversion / Pages 195-211 --- Advanced inversion methods / Pages 213-227 --- Error analysis / Pages 229-243 --- Parallel computation in modelling and inversion / Pages 245-255

Description / Table of Contents: PREFACE This book represents the first attempt in three decades to marshall out available information on the regional geology of Africa for advanced undergraduates and beginning graduate students. Geologic education in African universities is severely hampered by the lack of a textbook on African regional geology. This situation is greatly exacerbated by the inability of most African universities to purchase reference books and maintain journal subscriptions. Besides, geologic information about Africa is so widely dispersed that a balanced and comprehensive course content on Africa is beyond the routine preparation of lecture notes by university teachers. Since geology is a universal subject and Africa is one of the largest landmasses on Earth with one of the longest continuous records of Earth history, there is no doubt that geologic education in other parts of the world will benefit from a comprehensive presentation of African geologic case histories. The scope of this text also addresses the need of the professional geologist, who may require some general or background information about an unfamiliar African geologic region or age interval. Africa occupies a central position in the world's mineral raw materials trade. Because of its enormous extent and great geologic age, the diversity and size of Africa's mineral endowment is unparalleled. Africa is the leading source of gold, diamond, uranium, and dominates the world's supply of strategic minerals such as chromium, manganese, cobalt, and platinum. Consequently, African nations from Algeria to Zimbabwe depend solely on mineral exports for economic survival. The geologic factors which govern economic mineral deposits are stressed in this text. The geological history of Africa spans 3.8 billion years, a record that is unique both in duration and continuity. Few other parts of our planet match the plethora of geologic phenomena and processes that are displayed in the African continent. From the various stages of crustal evolution decipherable from the Archean of southern Africa, through the plate tectonics scenarios in the ubiquitous Late Proterozoic-Early Paleozoic Pan-African mobile belts and in the Hercynian and Alpine orogenies of northwest Africa, to the East African Rift Valley, Africa is replete with excellent examples and problems for a course on regional tectonics. Teachers of igneous and metamorphic petrology can hardly ignore Africa's anorogenic magmatism (e.g.. layered ultramafic intrusives such as the Great Dyke and the Bushveld Complex; the Tete gabbro-anorthosite pluton; alkaline complexes; basaltic volcanism), or tantalizing highgrade metamorphic terranes such as the Limpopo belt, the Namaqua mobile belt, and the Mozambique belt. From the extensive Precambrian supracrustal sequences throughout the continent with enormous thicknesses of sedimentary rocks that have hardly been deformed or metamorphosed, to the stratigraphic evolution of Africa's present-day passive continental margin, there is a complete spectrum of facies models upon which to base a course on basin analysis and stratigraphy. To maintain its integrity a course on historical geology anywhere in the world must address the theory of Continental Drift beyond invoking past continuities between West Africa and South America. Past connections between West Africa and eastern North America must equally be explored, so also connections between northeast Africa and Arabia, and the paleogeography of southern Gondwana where Africa occupied centre stage. The Precambrian fossil record, the transitions from reptiles to the earliest mammals and dinosaurs, and the evolution of Man are among Africa's unique contributions to the history of life and the story of organic evolution. Although it lies today in the tropics Africa was the theatre of the Earth's most-spectacular glaciations. Even after the scene of continental glaciation had shifted to the northern continents only lately during the Pleistocene, Africa still witnessed spectacular climatic fluctuations during the Quaternary. Certainly students of archeology and paleoanthropology cannot overlook the Quaternary paleoenvironmental record of the Olduvai Gorge in Tanzania, the Lake Turkana basin in Kenya, the Nile valley, the Sahara, and southern Africa. But since African examples have already been cited in standard geologic textbook, I have often been asked why it has become necessary to revive the idea of a full-length textbook on African geology, 30 years after this idea was abandoned by the geologic community. My simple answer, as already stated, is that the wealth of available geologic information about Africa is so enormous and fascinating, but so diffuse, that an attempt must be made to assemble and pass on this knowledge.

Description / Table of Contents: INTRODUCTION The International Summer School of Theoretical Geodesy on Satellite Altimetry in Geodesy and Oceanography was held in Trieste (Italy) from May 25 to June 6, igg2. It was organized by Prof. R. Rummel of the Delft University of Technology and by Prof. F. Sansò of the Politecnico di Milano and was attended by 63 participants and 7 lecturers from 17 countries. The School was hosted by the International Centre of Theoretical Physics of Trieste. Satellite altimetry provides a lot of data that require more and more sophisticated models in order to be interpreted and exploited. One of the main problems related to the practical treatment of the data can be summarized as follows: oceanographers would like to ask geodesists to compute precise orbits and a precise geoid in order to put into evidence the Sea Surface Topography that can be interpreted as an oceanographic signal related to currents and to several physical parameters; on the other hand, geodesists would like to ask oceanographers to a-priori determine the Sea Surface Topography, in order to be able to extract from the altimeter data the geoid and the orbit errors to be used in the gravity field modelling. The solution to this dilemma can only be found in a cooperative frame. An integrated model to be used for a single-step treatment of altimetry is probably far to be defined, so at present geodesists and oceanographers must cooperate to obtain step-wise and iterative modelling of the gravity field and of the oceanographic phenomena. This is precisely the reason why the school on Satellite Altimetry was organized on an interdisciplinary basis...

Description / Table of Contents: PREFACE Sedimentation as a Three-Component System describes the most common styles of deposition in marine environments as they relate to sediment composition. Three components, organic matter, carbonate, and siliciclastic sediment, may settle concurrently, but at different rates, intermixing on the sea floor to form a particular sediment composition. A change in the flux of one component is capable of relatively diluting or concentrating the other two components, which can be expressed in the characteristic ratio of organic carbon to carbonate in the resulting sediment. The basic concept of this book is to address organic carbon-carbonate associations in terms of depositional inputs and time spans. In addition, the three-component system describes organic carbon changes related to major facies transitions. Examples include models of the genesis of carbonaceous sediments, with their various laminated to bioturbated lithotypes, and numerical organic carbon prediction. I hope that this book will encourage stimulating discussions and promote a new approach to quantitative stratigraphy...

Description / Table of Contents: INTRODUCTION "The geological history, as expressed by the stratigraphic column, is basically composed of cycles of sedimentation, stratification and magmatism which correlate with relative changes in sea level determined in turn by different types of crustal movements. The classical sequence of stages "transgression - inundation - differentiation - regression - emergence" is believed to reflect the deformation phases of a geotectonic cycle" (Wezel,1988: p.37). The concept of geotectonic cycle is fundamental in geology because it links tectonics with sedimentary processes. According to Wezel (1988) the geotectonic cycle is an expression of cyclic variations in the behavior of the crust; more precisely,it is a geodynamic response to the Earth's variations in the rate of rotation (Mörner,19869 Whyte,1977~ Carey,1976).Based on a global analysis of geotectonic data, synchronous episodes of intense global swelling, governed by cyclically ordered diastrophic processes, were identified (Wezel,1985;1988). The process leading to these swells was termed krikogenesis (Wezel, 1988).It basically consists of not steady, localized, migratory vertical movements linked to mantle diapirism and concentrated in single zones.The overlying crust adjusts itself to mantle motions induced by krikogenesis, with the formation of transient troughs and swells ('touche-de-piano' tectonics).This mechanism was individuated in several areas (Wezel,1988). The history of the Earth is described by six episodes that repeat in the same way in the course of geological time.Their duration progressively decreases:the first cycle has a duration of about 200 million years, the following,younger cycles lasted 150, 115, 65, A5 and 20 m.y. ...

Description / Table of Contents: 1. Planets, Meteorites and Cosmic Dusts --- Primordial Xe Isotopic Abundances and 244Pu-136Xe Ages of Primitive Xe Differentiated Achondrites / Eugster O., Weigel A., and Michel Th. / pp. 1-9 --- The RELAX Mass Spectrometer and Its Application to Iodine-Xenon Dating / Gilmour J. D. and Turner G. / pp. 11-21 --- Enrichment and Fractionation of Noble Gases in Bubbles / Takaoka N. / pp. 23-29 --- "Q-Gases" as "Local" Primordial Noble Gas Component in Primitive Meteorites / Wieler R. / pp. 31-41 --- Weathering and Atmospheric Noble Gases in Chondrites / Scherer P., Schultz L., and Loeken T. / pp. 43-53 --- Radiogenic Noble Gas Constraints on Mars' Evolution / Sasaki S. / pp. 55-66 --- Retentivity of Solar He and Ne in IDPS in Deep Sea Sediment / Hiyagon H. / pp. 67-75 --- Influx and Age Constraints on the Recycled Cosmic Dust Explanation for High 3He/4He Ratios at Hotspot Volcanos / Trull T. / pp. 77-88 --- 2. Mantle and Crust --- Geochronology of Tellurium Ores and the Double-Beta Decay Lifetime of 130Te / Podosek F. A., Brannon J. C., Bernatowicz T. J., Brazzle R., Grauch R., Cowsik R., and Hohenberg C. M. / pp. 89-113 --- Cosmic-Ray-Produced Neon at the Surface of the Earth / Graf T., Kim J. S., Marti K., and Niedermann S. / pp. 115-123 --- Current Status of Xes-Xen Dating / Shukolyukov Yu. A., Meshik A. P., Krylov D. P., and Pravdivtseva O. V. / pp. 125-146 --- Atmospheric, MORB-Like, and Crustal-Derived Noble Gas Components in Subduction-Related Samples / Patterson D. B., Honda M., and McDougall I. / pp. 147-158 --- Noble Gases in Deformed Xenoliths from an Ocean Island: Characterization of a Metasomatic Fluid / Farley K. A., Poreda R. J., and Onstott T. C. / pp. 159-178 --- Deconvolution of Multiple Components of Neon and Helium in Mantle-Derived Samples / Patterson D. B., Honda M., and McDougall I. / pp. 179-189 --- Neon and Argon Isotopic Constraints on Earth-Atmosphere Evolution / Marty B. and Allé P. / pp. 191-204 --- The Effect of Water on Noble Gas Signatures of Volcanic Materials / Kaneoka I. / pp. 205-215 --- 3. Water, Gases and Diamonds --- Indigenous and Extraneous Noble Gases in Terrestrial Diamonds / Begemann F. / pp. 217-227 --- Isotopic Variations of Helium in the Diamonds of the Kokchetav Massif's Metamorphic Rocks, Kazakhstan / Pleshakov A. M. and Shukolyukov Yu. A. / pp. 229-243 --- Helium Isotopic Information from Diamonds: Critical Data Available and Needed / Lal D. / pp. 245-260 --- He-Ar Isotope Systematics of Fluid Inclusions: Resolving Mantle and Crustal Contributions to Hydrothermal Fluids / Stuart F., Turner G., and Taylor R. / pp. 261-277 --- Mantle Helium in the Groundwater of the Mirror Lake Basin, New Hampshire, U.S.A. / Torgersen T., Drenkard S., Farley K., Schlosser P., and Shapiro A. / pp. 279-292 --- Volcanic Activity Revealed by Isotope Systematics of Gases from Hydrothermal Springs in Tengchong, China / Wang X., Chen J., Li Y., Wen Q., Sun M., Li C., and Hu G. / pp. 293-304 --- Helium Isotopic Compositions in Quaternary Volcanic Geothermal Area near Indo-Eurasian Collisional Margin at Tengchong, China / Xu S., Nakal S., Wakita H., Wang X., and Chen J. / pp. 305-313 --- 4. Basic Properties --- Sites and Behaviors ofNoble Gas Atoms in MgO Crystal Simulated by the Molecular Dynamics (MD) Method / Tsuchiyama A. and Kawamura K. / pp. 315-323 --- Noble Gas Solubilities in Melts and Crystals / Carroll M. R., Draper D. S., Brooker R. A., and Kelley S. / pp. 325-341 --- Noble Gas Partition between Basaltic Melt and Olivine Crystals at High Pressures / Shibata T., Takahashi E., and Ozima M. / pp. 343-354 --- Noble Gas Partitioning between Metal and Silicate under High Pressures: The Case of Iron and Peridotite / Sudo M., Ohtaka O., and Matsuda J. / pp. 355-372 --- Noble Gas Partitioning in Natural Samples: Results from Coexisting Glass and Olivine Phenocrysts in Four Hawaiian Submarine Basalts / Valbracht P. J., Honda M., Staudigel H., McDougall I., and Trost A. P. / pp. 373-381 --- Retrospective --- After Dinner Talk (A Diagrammatic Summary of Noble Gas Isotope Research in the Physics Department at Berkeley) / Reynolds J. H. / pp. 383-386

Description / Table of Contents: 1. Crustal Evolution: East Antarctic Shield --- Archacan Events in Antarctica / L. P. BLACK, J. W. SHERATON and P. D. KINNY / pp. 1-6 --- Metamorphic Evolution of the Sør Rondane Mountains, East Antarctica / M. ASAMI, Y. OSANAI, K. SHIRAISHI and H. MAKIMOTO / pp. 7-16 --- Geochemical Characteristics of Metamorphic Rocks from the Central Sør Rondane Mountains., East Antarctica / Y. OSANAI, K. SHIRAISHI, Y. TAKAHASHI, H. ISHIZUKA, Y. TAINOSHO, N. TSUCHIYA, T. SAKIYAMA and S. KODAMA / pp. 17-28 --- Sm-Nd and Rb-Sr Ages of Metamorphic Rocks from the Sør Rondane Mountains., East Antarctica / K. SHIRAISHI and H. KAGAMI / pp. 29-36 --- Reconnaissance Geochronologic Data on Proterozoic Polymetamorphic Rocks of the Eastern Sør Rondane Mountains, East Antarctica / E. S. GREW, W. I. MANTON, M. ASAMI and H. MAKIMOTO / pp. 37-44 --- Petrochemical Character and Rb-Sr Isotopic Investigation of the Granitic Rocks from the Sør Rondane Mountains, East Antarctica / Y. TAINOSHO, Y. TAKAHASHI, Y. ARAKAWA, Y. OSANAI, N. TSUCHIYA, T. SAKIYAMA and M. OWADA / pp. 45-54 --- Carbon and Oxygen Isotopic Compositions of Marbles from the Sør Rondane Mountains, East Antarctica / N. TSUCHIYA, Y. OSANAI and H. WADA / pp. 55-60 --- 40Ar-39Ar Geochronological Studies on some Paleomagnetic Samples of East Antarctica / Y. TAKIGAMI, M. FUNAKI and K. TOKIEDA / pp. 61-66 --- The First Report of a Cambrian Orogenic Belt in East Antarctica—An Ion Microprobe Study of the Lützow-Holm Complex / K. SHIRAISHI, Y. HIROI, D. J. ELLIS, C. M. FANNING, Y. MOTOYOSHI and Y. NAKAI / pp. 67-74 --- A New Insight of Possible Correlation between the Lützow-Holm Bay Granulites (East Antarctica) and the Sri Lankan Granulites / Y. OGO, Y. HIROI, K. B. N. PRAME and Y. MOTOYOSHI / pp. 75-86 --- Osumilite-Producing Reactions in High Temperature Granulites from the Napier Complex, East Antarctica: Tectonic Implications / B. J. HENSEN and Y. MOTOYOSHI / pp. 87-92 --- Gneisses of the Porthos and Athos Ranges, Northern Prince Charles Mountains, East Antarctica: Constraints on the Prograde and Retrograde P-T Path / D. E. THOST and B. J. HENSEN / pp. 93-102 --- Mineral Reaction Textures in High-Grade Gneisses: Evidence for Contrasting Pressure-Temperature Paths in the Proterozoic Complex of East Antarctica / I. C. W. FITZSIMONS and S. L. HARLEY / pp. 103-112 --- Mode of Occurrence, Geochemistry and Mineral Textures of Mafic to Ultramafic Rocks from the Bolingen Islands, Prydz Bay., East Antarctica / D. E. THOST, Y. MOTOYOSHI and B. J. HENSEN / pp. 113-118 --- The Significance of Reworking, Fluids and Partial Melting in Granulite Metamorphism, East Prydz Bay, Antarctica / S. L. HARLEY, I. C. W. FITZSIMONS, I. S. BUICK and G. WATT / pp. 119-128 --- Stable Isotope Studies of Granulite Facies Metamorphism in the Rauer Group, East Antarctica / I. S. BUICK, S. L. HARLEY and D. MATTEY / pp. 129-136 --- A Late- Proterozoic Extensional-Compressional Tectonic Cycle in East Antarctica / J. D. HOEK, P. H. G. M. DIRKS and C. W. PASSCHIER / pp. 137-144 --- Re-Examination of the Metamorphic Evolution of the Larsemann Hills., East Antarctica / L. REN, Y. ZHAO, X. LIU and T. CHEN / pp. 145-154 --- Geochronology of the Late Granite in the Larsemann Hills, East Antarctica / Y. ZHAO, B. SONG, Y. WANG, L. REN, J. LI and T. CHEN / pp. 155-162 --- The First Study of Upper Mantle Inclusions from the Prince Charles Mountains, East Antarctica / A. V. ANDRONIKOV / pp. 163-173 --- Mafic Igneous Suites in the Lambert Rift Zone / E. V. MIKHALSKY, A. V. ANDRONIKOV and B. V. BELIATSKY / pp. 173-178 --- Granitic Rocks of the Jetty Peninsula, Amery Ice Shelf Area, East Antarctica / W. I. MANTON, E. S. GREW, J. HOFMANN and J. W. SHERATON / pp. 179-190 --- Paleomagnetic and 40Arl/39Ar Dating Studies of the Mawson Charnockite and Some Rocks from the Christensen Coast / M. FUNAKI and K. SAITO / pp. 191-202 --- 2. Crustal Evolution: Transantarctic Mountains and West Antarctica --- Multiple Petrotectonic Events in High-Grade Metamorphic Rocks of the Nimrod Group, Central Transantarctic Mountains, Antarctica / J. W. GOODGE, V. L. HANSEN and S. M. PEACOCK / pp. 203-210 --- Metamorphic Facies of the Ross Orogeny in the Southern Wilson Terrane of Northern Victoria Land, Antarctica / F. TALARICO, M. FRANCESCHELLI, B. LOMBARDO, R. PALMERI, P. C. PERTUSATI, N. RASTELLI and C. A. RICCI / pp. 211-218 --- Metasedimentary Rocks of Western Wilson Terrane (Victoria Land - Oates Land) and Gondwana Connections to Australia / D. N. B. SKININER / pp. 219-226 --- Compressional Causes for the Early Palcozoic Ross Orogen—Evidence from Victoria Land and the Shackleton Range / G. KLEINSCHEMIDT, W. BUGGISCH and T. FLOETTMANN / pp. 227-234 --- Pre-Beacon Tectonic Development of the Transantarctic Mountains / E. STUMP / pp. 235-240 --- Statistical Analysis of Geochemical Patterns in Fine-Grained Permian Mudrocks from the Beardmore Glacier Region, Antarctica / T. C. HORNER and L. A. KRISSEK / pp. 241-248 --- Stratigraphy and Sedimentology of Vertebrate Bone-Bearing Beds in the Triassic (and Jurassic?) Fremouw and Falla Formations, Beardmore Glacier Region., Antarctica / L. A. KRISSEK, T. C. HORNER, D. H. ELLIOT and J. W. COLLINSON / pp. 249-256 --- Early Palcozoic Lamprophyre Dikes of Southern Victoria Land: Geology, Petrology and Geochemistry / B. WU and J. H. BERG / pp. 257-264 --- Crustal Xenoliths from Cape McCormick Crater, Northern Victoria Land / J. H. BERG and B. WU / pp. 265-272 --- Xenoliths from the Volcanic Province of West Antarctica and Implications for Lithospheric Structure and Processes / R. J. WYSOCZANSKI and J. A. GAMBLE / pp. 273-278 --- Geological and Geophysical Exploration in the Northern Ford Ranges, Maric Byrd Land, West Antarctica / B. P. LUYENDYK, S. M. RICHARD, C. H. SMITH and D. L. KIMBROUGH / pp. 279-288 --- Structure and Cooling History of the Fosdick Metamorphic Complex, Marie Byrd Land, West Antarctica / S. M. RICHARD / pp. 289-294 --- Metapelites and Migmatites at the Granulite Facies Transition, Fosdick Metamorphic Complex, Marie Byrd Land, West Antarctica / C. H. SMITH / pp. 295-302 --- 3. Syn- and Post-Breakup of Gondwana --- Mesozoic and Cenozoic Kinematic Evolution of the Transantarctic Mountains / T. J. WILSON / pp. 303-314 --- The West Antarctic Rift System—A Propagating Rift "Captured" by a Mantle Plume? / J. C. BEHRENDT, W. LEMASURIER and A. K. COOPER / pp. 315-322 --- Apatite Fission Track Evidence for Contrasting Thermal and Uplift Histories of Metamorphic Basement Blocks in Western Dronning Maud Land / J. JACOBS, E. HEJL, G. A. WAGNER and K. WEBER / pp. 323-330 --- Early Cretaceous Uplift of the Southern Sentinel. Range, Ellsworth Mountains, West Antarctica / P. G. FITZGERALD and E. STUMP / pp. 331-340 --- Petrologic Comparison of Palcozoic Rocks from the English Coast, Eastern Ellsworth Land, and the Ellsworth Mountains / T. S. LAUDON and C. CRADDOCK / pp. 341-346 --- Provenance of Paleocene Strata, Seymour Island / D. H. ELLIOT, S. M. HOFFMAN and D. E. RIESKE / pp. 347-356 --- Sedimentology of the Miers Bluff Formation, Livingston Island, South Shetland Islands / A. ARCHE, J. LOPEZ-MARTINEZ and E. MARTINEZ DE PISON / pp. 357-362 --- Late Cretaceous and Eocene Palynofloras from Fildes Peninsula, King George Island (South Shetland Islands), Antarctica / L. CAO / pp. 363-370 --- Early Tertiary Palaeoclimate of King George Island, Antarctica—Evidence from the Fossil Hill Flora / H. M. LI / pp. 371-376 --- Modes of Formation and Accretion of Oceanic Material in the Mesozoic Fore-Arc of Central and Southern Alexander Island, Antarctica: A Summary / P. A. DOUBLEDAY and T. H. TRANTER / pp. 377-382 --- The Magmatic Complexes of the Rouen Mountains and Elgar Uplands from Alexander Island, Antarctic Peninsula: Geochemical Constraints / B. K. KAMENOV and C. T. PIMPIREV / pp. 383-394 --- Transverse Variations in the Gerlache Strait Plutonic Rocks: Effects of the Aluk Ridge-Trench Collision in the Northern Antarctic Peninsula / M. A. PARADA, J.-B. ORSINI and R. ARDILA / pp. 395-404 --- 4. Recent Tectonics of Antarctic Peninsula and Subantarctic Regions --- Evolution of the Bransfield Basin and Rift, West Antarctica / K. BIRKENMAJER / pp. 405-410 --- Uplift Movements King George Island Associated Bransfield Rift Activity / M. ARANEDA and O. GONZÁLEZ-FERRÁN / pp. 411-416 --- Geotransect Drake Passage - Weddell Sea, Antarctica / R. A. J. TROUW and L. A, P. GAMBÔA / pp. 417-422 --- Long-Range Sidescan Sonar (GLORIA) Survey of the Antarctic Peninsula Pacific Margin / J. S. TOMLINSON, C. J. PUDSEY, R. A. LIVERMORE, R. D. LARTER and P. F. BARKER / pp. 423-430 --- Marine Magnetic Anomalies in Bransfield Strait, Antarctica / Y. KIM, T. W. CHUNG and S. H. NAM / pp. 431-438 --- Geochronology and Geochemistry of the Igneous Rocks from Barton and Fildes Peninsulas, King George Island: A Review / Y.-J. JWA, B.-K. PARK and Y. KIM / pp. 439-442 --- Geophysical Features of Deception Island / R. ORTIZ, J. VILA, A. GARCIA, A. G. CAMACHO, J. L. DIEZ, A. APARICIO, R. SOTO, J. G. VIRAMONTE, C. RISSO, N. MENEGATTI and I. PETRINOVIC / pp. 443-448 --- Seismic Activity on Deception Island / J. VILA, R. ORTIZ, A. M. CORREIG, and A. GARCIA / pp. 449-456 --- The Zeolitisation Model of Kerguelen Islands, Southern Indian Ocean / A. GIRET, O. VERDIER and P. NATIVEL / pp. 457-464 --- 5. Terrestrial Geophysics --- Regional Geophysical Imaging of the Antarctic Lithosphere / R. R. B. VON FRESE, D. E. ALSDORF, J-H. KIM, T. M. STEPP, D. R. H. O'CONNELL, K. J. HAYDEN and W-S. LI / pp. 465-474 --- Present Status of Seismic Network in Antarctica / K. KAMINUMA / pp. 475-482 --- Phase Velocity Distribution Beneath Antarctica and Surrounding Oceans / D. ROULAND and G. ROULT / pp. 483-488 --- Determination of the Gravity Field around Antarctica Using Satellite Altimeter Data and Surface Gravity Data —A Review of the Recent Studies— / Y. FUKUDA, J. SEGAWA and K. KAMINUMA / pp. 489-492 --- Intermittent Micro-Seismic Activity in the Vicinity of Syowa Station, East Antarctica / K. KAMINUMA and J. AKAMATSU / pp. 493-498 --- An Approach to the Seismicity of Mt. Melbourne Volcano (Northern Victoria Land—Antarctica) / E. PRIVITERA, L. VILLARI and S. GAMBINO / pp. 499-506 --- The Crustal Structure beneath Ice Stream C and Ridge BC, West Antarctica from Seismic Refraction and Gravity Measurements / C. G. MUNSON and C. R. BENTLEY / pp. 507-514 --- Numerical Modelling of Uplift and Subsidence Adjacent to the Transantarctic Mountain Front / T. A. STERN, U. S. TEN BRINK and M. H. P. BOTT / pp. 515-522 --- Gravity Study of the Mt. Melbourne Quadrangle and the Lower Rennick Glacier Area in North Victoria Land., Antarctica, and the Relation of the Rennick Graben Structure to Rifting Processes in the Ross Sea / J. KIENLE, T. F. REDFIELD and A. M. GOODLIFFE / pp. 523-534 --- Gravity Modeling Across the Transantarctic Mountains, Northern Victoria Land / T. F. REDFIELD and J. C. BEHRENDT / pp. 535-544 --- A Preliminary Aeromagnetic Anomaly Compilation Map for the Weddell Province of Antarctica / A. C. JOHNSON, N. D. ALESHKOVA, P. F. BARKER, A. V. GOLYNSKY, V. N. MASOLOV and A. M. SMITH / pp. 545-554 --- New Aeromagnetic Map of West Antarctica (Weddell Sea Sector): Introduction to Important Features / A. C. JOHNSON and A. M. SMITH / pp. 555-562 --- Ground Magnetics in North Victoria Land (East Antarctica) / E. BOZZO, A. COLLA and A. MELONI / pp. 563-570 --- Airborne Gravity from a Light Aircraft: CASERTZ 1990-1991 / R. E. BELL, B. J. COAKLEY, D. D. BLANKENSHIP, S. M. HODGE, J. M. BROZENA and J. JARVIS / pp. 571-578 --- Thinning Rate of Ice Sheet on Mizuho Plateau, East Antarctica, Determined by GPS Differential Positioning / H. TOH and K. SHIBUYA / pp. 579-584 --- The Geophysical Observatory at Terra Nova Bay / A. MELONI, A. DE SANTIS, A. MORELLI, P. PALANGIO, G. ROMEO, E. BOZZO and G. CANEVA / pp. 585-588 --- The Absolute Gravity Station and the Mt. Melbourne Gravity Network in Terra Nova Bay, North Victoria Land, East Antarctica / G. CERUTTI, F. ALASIA, A. GERMAK, E. BOZZO, G. CANEVA, R. LANZA and I. MARSON / pp. 589-564 --- Seismological Observations by a Three-Component Broadband Digital Seismograph at Syowa Station, Antarctica / K. NAGASAKA, K. KAMINUMA and K. SHIBUYA / pp. 595-602 --- 6. Marine Geology and Geophysics --- Preliminary Seismic Stratigraphy of the Northwestern Weddell Sea Continental Shelf / J. B. ANDERSON, S. S. SHIPP and F. P. SIRINGAN / pp. 603-612 --- Sequence Stratigraphy of the Crary Fan, Southeastern Weddell Sea / A. MOONS, M. DE BATIST, J. P. HENRIET H. MILLER / pp. 613-618 --- Modeling of Cenozoic Stratigraphy in the Ross Sea Using Sonobuoy Seismic-Refraction Data / G. R. COCHRANE and A. K. COOPER / pp. 619-626 --- Heat Flow and Tectonics of the Western Ross Sea / B. DELLA VEDOVA, G. PELLLS, L. A. LAWVER and G. BRANCOLINI / pp. 627-638 --- Tectonic Development of Graben over the Astrid Ridge off Dronning Maud Land, Antarctica / D. GOPALA RAO, M. V. RAMANA and K. V. L. N. S. SARMA / pp. 639-648 --- The Directions of Magnetic Anomaly Lineations in Enderby Basin, off Antarctica / Y. NOGI, N. SEAMA and N. ISEZAKI / pp. 649-654 --- International Offshore Studies on Antarctic Cenozoic History, Glaciation, and Sea-Level Change: The ANTOSTRAT Project / A. K. COOPER and P. N. WEBB / pp. 655-660 --- 7. Cenozoic Geology and Geornorphology --- Late Cenozoic Glacial History in the Sør -Rondane Mountains, East Antarctica / K. MORIWAKI, K. HIRAKAWA, M. HAYASHI and S. IWATA / pp. 661-668 --- Glaciation of the Central Part of the Sør Rondane, Antarctica: Glaciological Evidence / F. PATTYN, H. DECLEIR and P. HUYBRECHTS / pp. 669-678 --- Observations of Clayey Till and Underlying Glacier Ice in the Central Sør Rondane Mountains, East Antarctica / H. HASEGAWA, S. IWATA and N. MATSUOKA / pp. 679-682 --- Late Quaternary Ice-Surface Fluctuations of the Lambert Glacier / M. C. G. MABIN / pp. 683-688 --- Late Quaternary History of the Bunger Hills, East Antarctica / E. A. COLHOUN and D. A. ADAMSON / pp. 689-698 --- Late Neogene Sediments of Coastal East Antarctica —An Overview / P. G. QUILTY / pp. 699-706 --- Cenozoic Glacial Geology and Mountain Uplift in Northern Victoria Land, Antarctica / F. M. VAN DER WATEREN and A. L. L. M. VERBERS / pp. 707-714 --- A Glacio-Geological Reconnaissance of the Southern Prince Albert Mountains, Victoria Land, Antarctica / A. L. L. M. VERBERS and F. M. VAN DER WATEREN / pp. 715-720 --- Geomorphology of the Priestley Glacier to Campbell Glacier Transect Mapped by Aerial Photographs (Victoria Land - Antarctica) / A. BIASINI, O. FANUCCI and M. C. SALVATORE / pp. 721-726 --- Satellite Data Processing of Victoria Land / R. CASACCHIA, A. CAPRARO, M. POSCOLIERI, R. SALVATORI, R. BIANCHI and A. PICCHIOTTI / pp. 727-732 --- Fluctuations of Ice Tongues and Ice Shelves Derived from Satellite Images in Terra Nova Bay Area, Victoria Land, Antarctica / M. FREZZOTTI / pp. 733-740 --- The Last Major Deglaciation in the Antarctic Peninsula Region—A Review of Recent Swedish Quaternary Research— / C. HJORT, Ó. INGÓLFSSON and S. BJÖRCK / pp. 741-744 --- Permafrost Occurrence of Seymour Island and James Ross Island, Antarctic Peninsula Region / M. FUKUDA, J. STRELIN, K. SHIMOKAWA, N. TAKAHASHI, T. SONE and D. TROMBOTT / pp. 745-750 --- Geomorphology of Hurd Peninsula, Livingston Island, South Shetland Islands / J. LOPEZ-MARTINEZ, E. MARTINEZ DE PISON and A. ARCHE / pp. 751-756 --- Mechanical Weathering on Livingston Island, South Shetland Islands, Antarctica / K. J. HALL / pp. 757-762 --- Modeling the Bathymetry of the Antarctic Continental Shelf / U. S. TEN BRINK and A. K. COOPER / pp. 763-772 --- Cenozoic Glacial History of Antarctica—A Correlative Synthesis / K. MORIWAKI, Y. YOSHIDA and D. M. HARWOOD / pp. 773-780 --- Late Quaternary Environmental Changes in the Antarctic and their Correlation with Global Change / Q. S. ZHANG / pp. 781-786

Description / Table of Contents: SHOCK COMPRESSION OF MATERIALS AND NEW MATERIALS SYNTHESIS / Akira B. Sawaoka / pp. 1-6 --- EXPLOSIVE TECHNIQUE FOR GENERATION OF HIGH DYNAMIC PRESSURE / Shuzo Fujiwara / pp. 7-21 --- TWO-STAGE LIGHT GAS GUN AS A HIGH PRESSURE TOOL FOR MATERIALS SCIENCE STUDY / Akira B. Sawaoka / pp. 23-31 --- A LAUNCH OF A PROJECTILE BY A TWO-STAGE LIGHT GAS GUN AND ITS OPTICAL OBSERVATION / Kunio Soga and Masao Shirouzu / pp. 33-47 --- RAIL GUN DEVELOPNENT AT TOKYO INSTITUTE OF TECHNOLOGY / Shu Usuba, ken-ichi Kondo and Akira B. Sawaoka / pp. 49-66 --- POWER SOURCES AND DIAGNOSTIC SYSTEM FOR RAILGUN / Yozo Kakudate, Shu Usuba, Masatake Yoshida, Katutoshi Aoki, Katsumi Tanaka, and Shyuzo Fujiwara / pp. 67-85 --- DIAMOND AND CUBIC BORON NITRIDE SYNTHESIS BY MEANS OF SHOCK-CONPRESSION / Nobuo Setaka and Tadao Sato / pp. 87-102 --- CHEMICAL EFFECTS OF SHOCK WAVES IN SOLIDS / Yasuhiko Syono / pp. 103-122

Description / Table of Contents: Chapter 1. High Resolution and Better Imaging --- MUSES-B Satellite System for VSOP / H. Hirosawa / pp. 3-9 --- Mechanical Design and Development of a Deployable Space Antenna for Japanese VLBI Space Observatory Program / M. C. Natori, T. Takano, K. Miyoshi, T. Inoue and T. Kitamura / pp. 10-20 --- Operation of the VSOP Satellite / Y. Murata / pp. 21-25 --- Ground Supporting Facilities for VSOP Observations / N. Kawaguchi, H. Kobayashi, T. Miyaji, H. Mikoshiba, A. Tojo, Z. Yamamoto and H. Hirosawa, / pp. 26-33 --- Space VLBI Simulations / D. W. Murphy, V. Yakimov, H. Kobayashi, A. R. Taylor and I. Fejes / pp. 34-38 --- Space VLBI Scheduling Studies: Techniques and Results / D. L. Meier / pp. 39-43 --- An Affordable Advanced Space VLBI Mission / J. S. Ulvestad, D. L. Meier, D. W. Murphy, R. A. Preston and J. G. Smith / pp. 44-48 --- Space VLBI Experiments Using ETS-VI / T. lwata, H. Kiuchi, M. Imae, M. Sekido and S. Hama / pp. 49-53 --- Space VLBI Polarization Observations / D. C. Gabuzda and A. R. Taylor / pp. 54-58 --- Space VLBI User Assistance Software / I. Fejes, D. W. Murphy, A. R. Taylor, V. Yakimov and G. Young / pp. 59-69 --- mm VLBI / L. B. Bååth / pp. 70-74 --- "High Sensitivity" VLBI at 86 GHz: First Fringes with the 100 m Radio Telescope at Effelsberg / K. J. Standke, D. A. Graham, T. P. Krichbaum, A. Witzel, C. J. Schalinski, A. E. E. Rogers, R. Booth, L. B. Bååth / pp. 75-85 --- Burst Mode System toward mJy Level mm-VLBI / M. Inoue, K. Matsumoto and N. Kawaguchi / pp. 86-88 --- 86 GHz Global VLBI Progress Report / S. Doeleman, A. E. E. Rogers, L. Bååth, C. Schalinski, T. Krichbaum, M. Inoue, A. Zensus, S. Padin, J. Carlstrom, D. Graham, C. Predmore, J. Moran, D. Backer, M. Wright, N. Whyborn, L. Nyman, K. Standke, M. Lerner and S. Kameno / pp. 89-92 --- Global 3- and 7-mm VLBI Observations of OJ287 / C. E. Tateyama and M. Inoue / pp. 93-100 --- VLBI Observations of the 22 GHz H2 0Maser in Late Type Stars / H. Takaba, T. lwata, M. Miyoshi, N. Ukita, S. Kameno and K. Matsumoto / pp. 101-104 --- The H2 0 Super Maser Outburst Region in the Orion Nebula / L. I. Matveyenko and P. J. Diamond / pp. 105-109 --- The Cosmological Application of the VLBI Technique at Ultimate Resolutions / L. I. Gurvits / pp. 110-114 --- First VLBI Images of Supernova 1993J in the Galaxy M81 / N. Bartel, M. F. Bietenholz, M. P. Rupen, J. E. Conway, A. J. Beasley, R. A. Sramek, J. D. Romney, M. A. Titus, D. A. Graham, V. I. Altunin, D. L. Jones, A. Rius, T. Venturi, G. Umana, R. L. Francis, M. L. McCall, M. G. Richer, C. C. Stevenson, K. W. Weiler, S. D. Van Dyk, N. Panagia, W. H. Cannon, J. Popelar and R. J. Davis / pp. 115-122 --- The Visibility-Spectrum Relation among Radio Loud AGNs / S. Kameno, M. Inoue, K. Matsumoto, H. Takaba, T. lwata, R. Nan and R. T. Schilizzi / pp. 123-129 --- Identification of the Superluminal Motion in Faint Parsec-Scale Jet of 3C390.3 / S. Wu, E. Preuss, W. Alef, K. I. Kellermann and Y. Qiu / pp. 130-136 --- A VLBI Search for Compact Nonthermal Emission from the Herbig Be Star MWC 297 / S. L. Skinner and R. B. Phillips / pp. 137-140 --- Snapshot VLBI Mapping of Variable Extragalactic Sources at 327 MHz / L. I. Gurvits, W. Alef, D. R. Altschuler, J. E. Carson, B. Dennison, D. Graham and A. S. Trotter / pp. 141-145 --- AO 0235+164151;A "Heretic" BL Lac / H. S. Chu, L. B. Bååth, F. T. Rantakyrö, R. S. Booth, R. E. Spencer and F. J. Zhang / pp. 146-155 --- Chapter 2. Antenna and Networks --- The New Receiver in the S, X, K Bands for the VLB1 Medicina Dish / A. Orfei, G. Maccaferri, S. Mariotti, M. Morsiani, G. P. Zacchiroli and G. Tomassetti / pp. 159-164 --- The Upgrade Proposal for the VLBI Medicina Antenna / A. Orfei, G. Maccaferri, S. Mariotti, M. Morsiani and G. P. Zacchiroli / pp. 165-170 --- VLBI at the Kyushu Tokai University / M. Fujishita, K. Miyasato, T. Yoshiyama and Y. Matsumae / pp. 171-175 --- VLBI Activities at the Matera Space Geodesy Center / R. Lanotte, G. Bianco, M. Fermi and L. Garramone / pp. 176-184 --- The Mizusawa 10-m Antenna and Its VLBI Observation System / K. M. Shibata, Y. Asaki, I. Asari, Y. Fukuzaki, T. Hara, K. Horiai, K. lwadate, 0. Kameya, N. Kawano, S. Kuji, S. Manabe, S. Sakai, T. Sasao, K. Sato, Y. Tamura and S. Tsuruta / pp. 185-190 --- The 6 m VLBI Telescope at Kagoshima, Japan / T. Omodaka, M. Morimoto, N. Kawaguchi, T. Miyaji, S. Yasuda, T. Suzuyama, T. Kitagawa, T. Miyazaki, L. Furuya, T. Jike, K. Miyazawa, H. Mikoshiba, S. Kuji, 0. Kameya and Kagoshima VLBI Group / pp. 191-195 --- Radio Telescopes and VLBI Facilities in Brazil / P. Kaufmann and C. E. Tateyama / pp. 196-199 --- Cryogenic Cooled Receivers for the QUASAR Network / A. V. lpatov, I. A. lpatova and V. V. Mardyshkin / pp. 200-204 --- The Australian Long Baseline Array—Status Report / A. Tzioumis, W. Wilson and R. Ferris / pp. 205-210 --- The Asia-Pacific Telescope—APT / A. Tzioumis / pp. 211-217 --- Present Status and Future Development on VLBI Facilities in China / Ye S. and Oian Z. / pp. 218-220 --- Chapter 3. The New Trends in Geodesy and Astrometry --- Plate Dynamics near Boundaries: What Governs the Transition between Episodic and Continuous Motions? / K. Heki / pp. 223-228 --- Improved Global Atmospheric Mapping Functions for VLBI and GPS / A. Niell / pp. 229-231 --- Method of Differential Fringe Phase Tracking / N. Kawano, T. Sasao, T. Hara, S. Kuji, 0. Kameya, K. Sato, K. lwadate and Y. Asaki / pp. 232-236 --- The Chinese National Space Geodetic Network / J. Cai / pp. 237-240 --- Satellite Position Determination by Difference of Range (DOR) Measurements / I. Kardos / pp. 241-250 --- Recent Geodetic VLBI Results from Shanghai Observatory / Ye S., Qian Z., Chen G. and Zhou, R. / pp. 251-253 --- An Antennacluster-Antennacluster VLBI Project VERA / T. Sasao, N. Kawano, T. Hara, S. Kuji, K. Shibata, K. lwadate, K. Sato, 0. Kameya, S. Tsuruta, K. Asari, Y. Tamura, K. Horiai, K. Sato, H. Hanada, T. Tsubokawa, K. Yokoyama, S. Manabe and S. Sakai / pp. 254-258 --- An Astronomical Observational Plan Using the VERA / O. Kameya, T. Sasao, N. Kawano and K. M. Shibata / pp. 259-263 --- Estimated Errors in the Antennacluster-Antennacluster VLBI / T. Hara, T. Sasao, K. Sato, N. Kawano and O. Kameya / pp. 264-271 --- Sub-Milliarcsecond Astrometry with Phase-Referenced VLBI / D. L. Jones, J.-F. Lestrade, R. A. Preston and R. B. Phillips / pp. 272-276 --- Selenodesy by Using Differential VLBI Observations of Artificial Radio Sources on the Moon / H. Hanada, M. Ooe, N. Kawano, K. lwadate, S. Kuji, K. Sato, S. Tsuruta, T. Sasao, 0. Kameya, T. Hara, N. Kawaguchi, M. Fujishita, M. Morimoto, S. Yasuda, H. Mizutani and A. Fujimura / pp. 277-281 --- Gravitational Lens Effect and Measurement of Stellar Mass / M. Hosokawa, K. Ohnishi, T. Fukushima and M. Takeuti / pp. 282-286 --- Evidence for Source Structure Effects Caused by the Quasar 3C273 in Geodetic VLBI Data / P. Charlot / pp. 287-294 --- Astronomical Periods in the Solar System / Y. Macyama / pp. 295-305 --- Pulsar VLBI Experiment Using Kashima-Usuda Baseline / M. Sekido, S. Hama, H. Kiuchi, Y. Hanado, Y. Takahashi, M. Imae, K. Fujisawa and H. Hirabayashi / pp. 306-312 --- The Celestial Reference System and Frame of the International Earth Rotation Service / E. F. Arias / pp. 313-315 --- Quasi Simultaneous Observations in the Arclength Method of Reduction of Astrometric VLBI Data / M. S. De Biasi, E. F. Arias and J.-F. Lestrade / pp. 316-318 --- Few-Hundred Microarcsecond VLBI Astrometry: Applications and Reduction of Limiting Error Sources / S. T. Lowe and R. N. Treuhaft / pp. 319-323 --- Chapter 4. Recorders and Correlators --- A New Advanced One-Unit VLBI Correlator (NAOCO) / K. Shibata, T. Sasao, N. Kawaguchi, Y. Tamura, S. Kameno, M. Miyoshi, K. Asari, S. Manabe, T. Hara, S. Kuji, K. Sato, T. Miyaji, K. Matsumoto, Y. Asaki, S. Yasuda and S. Nakamura / pp. 327-331 --- A Programmable VLBI Correlator Using Parallel Computing / G. Petit and T. Fayard / pp. 332-337 --- Status of the New K-4 System / H. Kiuchi, S. Hama, J. Amagai, Y. Hanado, A. Kaneko and M. Imae / pp. 338-344 --- The S2 Frequency Agile Data Acquisition Terminal / W. T. Petrachenko, P. Mathieu, J. Popelar, W. H. Cannon, H. Tan and R. D. Wietfeldt / pp. 345-350 --- A Chipset for a MKII Style Correlator / G. Tuccari / pp. 351-359 --- Keeping Compatibility in International VLBI Systems / T. Yoshino, S. Hama and N. Kawaguchi / pp. 360-364 --- Development of the Burst Mode VLBI / K. Matsumoto and N. Kawaguchi / pp. 365-370 --- The K4 Correlator / S. Hama, H. Kiuchi, M. Sekido and M. Imae / pp. 371-376 --- Notes on High Data Rate Recording / J. Takayama / pp. 377-380

Description / Table of Contents: An expanded version of lectures given at the Scuola Matematica Interuniversitaria, in Perugia, during the summer of 1989

Description / Table of Contents: Selected papers presented at the International Conference on Differential Equations and Mathematical Physics