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Timing Of Alluvial Fan Development Along The Chajnantor Plateau Atacama Desert Northern Chile
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Book Synopsis Timing of Alluvial Fan Development Along the Chajnantor Plateau, Atacama Desert, Northern Chile by : Jason M. Cesta
Download or read book Timing of Alluvial Fan Development Along the Chajnantor Plateau, Atacama Desert, Northern Chile written by Jason M. Cesta and published by . This book was released on 2015 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: An extensive alluvial apron of coalescing gravel fans blankets the western flank of the Chajnantor Plateau in the Atacama Desert of northern Chile. Remnant alluvial surfaces, terraces, and intermittent debris flow deposits preserved in this bajada indicate multiple intervals of aggradation, incision and terrace abandonment, and deposition. The high preservation potential and sensitivity to climate shifts of the region provides a unique opportunity to elucidate the sedimentary response to climate variations at an extreme of Earth's climate. Cosmogenic 36Cl exposure dating, aided by mapping, is used to establish a detailed chronology of the depositional history of the Chajnantor alluvial apron. Alluvial surfaces and gravel deposits yield cosmogenic exposure ages ranging from 20.7 ± 1.4 ka to 419.2 ± 39.6 ka. Debris flow boulders confined to modern and ancient channels yield cosmogenic exposure ages ranging from 9.3 ± 1.1 ka to 202.5 ± 19.6 ka. One localized (Qcf1) and two extensive (Qcf2 and Qcf3) abandoned alluvial fan surfaces yield cosmogenic exposure ages of ~33 ka, ~55 ka, and ~145 ka respectively. These abandonment ages coincide with periods of moraine stabilization and deglaciation on the adjacent Chajnantor Plateau. Protracted periods of aggradation appear to coincide with periods of increased precipitation and glacial occupation of the Chajnantor Plateau, and are punctuated by phases of incision and surface abandonment during interglacial periods. Cosmogenic exposure ages reveal a transition from aggradation to incision during marine oxygen isotope stage II (MIS II). These results suggest that climate, specifically precipitation, is the dominant control on alluvial fan formation along the western margin of the Chajnantor Plateau.
Book Synopsis Alluvial Fan Surfaces in the Atacama Desert by : Amanda Marie Baker
Download or read book Alluvial Fan Surfaces in the Atacama Desert written by Amanda Marie Baker and published by . This book was released on 2012 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Atacama Desert of Northern Chile is one of the oldest and driest landscapes on Earth. Many studies have referred to this landscape as relict, equating hyperaridity with abandonment as far as landscape modification is concerned. The presence of 26Ma boulders and 13Ma nitrate deposits do highlight landscape elements that have been unmoved due to a lack of precipitation since the onset of hyperaridity at least 10Ma. Evidence for more recent surface modification has caused some researchers to question the persistence of hyperaridity throughout the late Cenozic, emphasizing the potential for wetter and drier periods or even a delayed onset of hyperaridity overall. A series of recent studies, however, have called this perspective into question. One of the predominant criticisms is the sampling of boulders as representative landscape features for surface activation. Present day mudflows and massive mobilizations of sediment during cm-scale rain events provide evidence that, despite the current hyperarid climate, significant landscape modification events can occur. The work of this thesis focuses on two sets of precipitation-driven alluvial fans in the Coastal Cordillera of the Atacama Desert, first determining a base level of activity and then using those activations to study long-term records of coseismic surface deformation and potential implications for the presence of similar features in young craters on Mars.
Book Synopsis Alluvial Fan Morphodynamics Along the Coastal Atacama Desert -geomorphometric, Geologic, and Climatic Perspectives by : Janek Walk
Download or read book Alluvial Fan Morphodynamics Along the Coastal Atacama Desert -geomorphometric, Geologic, and Climatic Perspectives written by Janek Walk and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Salts and Surface Weathering Features on Alluvial Fans in Northern Chile by : Ingeborg Agnete Berger
Download or read book Salts and Surface Weathering Features on Alluvial Fans in Northern Chile written by Ingeborg Agnete Berger and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Heritage Sites of Astronomy and Archaeoastronomy in the Context of the UNESCO World Heritage Convention by : Clive L. N. Ruggles
Download or read book Heritage Sites of Astronomy and Archaeoastronomy in the Context of the UNESCO World Heritage Convention written by Clive L. N. Ruggles and published by Ocarina Books. This book was released on 2012 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Thematic Study is a joint venture between ICOMOS, the advisory body to UNESCO on cultural sites, and the International Astronomical Union. It presents an overall vision on astronomical heritage, attempts to identify what constitutes "outstanding universal significance to humankind" in relation to astronomy, and identifies broad issues that could arise in the assessment of cultural properties relating to astronomy. This is the first Thematic Study in any field of science heritage. It is elaborated using examples of properties from around the world, including some already on the World Heritage List or national Tentative Lists. The subject matter ranges from early prehistory to modern astrophysics and space heritage, and also prominently includes dark sky issues and modern observatory sites. An e-version of the Thematic Study was published in June 2010 in time to be presented to the 2010 meeting of UNESCO's World Heritage Committee, where it was duly approved. It has been circulated officially by the WHC to all of UNESCO's National Commissions. This full-colour paperback edition with some updates, and reformatted to new ICOMOS standards, was published in 2011 and is now offered for public sale.
Book Synopsis Tracking Environmental Change Using Lake Sediments by : John P. Smol
Download or read book Tracking Environmental Change Using Lake Sediments written by John P. Smol and published by Springer Science & Business Media. This book was released on 2006-04-11 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt: This third volume in the Developments in Paleoenvironmental Research series deals with the major terrestrial, algal, and siliceous indicators used in paleolimnology. Other volumes deal with the acquisition and archiving of lake sediment cores, chronological techniques, and large-scale basin analysis methods (Volume 1), physical and geochemical parameters and methods (Volume 2), zoological techniques (Volume 4), and statistical and data handling methods (Volume 5). These monographs will provide sufficient detail and breadth to be useful handbooks for both seasoned practitioners as well as newcomers to the area of paleolimnology. Although the chapters in these volumes target mainly lacustrine settings, many of the techniques described can also be readily applied to fluvial, glacial, marine, estuarine, and peatland environments.
Book Synopsis Landesque Capital by : N Thomas Håkansson
Download or read book Landesque Capital written by N Thomas Håkansson and published by Left Coast Press. This book was released on 2014-03-31 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the first comprehensive, global treatment of landesque capital, a widespread concept used to understand anthropogenic landscapes that serve important economic, social, and ritual purposes. Spanning the disciplines of anthropology, human ecology, geography, archaeology, and history, chapters combine theoretical rigor with in-depth empirical studies of major landscape modifications from ancient to contemporary times. They assess not only degradation but also the social, political, and economic institutions and contexts that make sustainability possible. Offering tightly edited, original contributions from leading scholars, this book will have a lasting influence on the study long-term human-environment relations in the human and natural sciences.
Book Synopsis Alluvial Fan Flooding by : National Research Council
Download or read book Alluvial Fan Flooding written by National Research Council and published by National Academies Press. This book was released on 1996-10-07 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alluvial fans are gently sloping, fan-shaped landforms common at the base of mountain ranges in arid and semiarid regions such as the American West. Floods on alluvial fans, although characterized by relatively shallow depths, strike with little if any warning, can travel at extremely high velocities, and can carry a tremendous amount of sediment and debris. Such flooding presents unique problems to federal and state planners in terms of quantifying flood hazards, predicting the magnitude at which those hazards can be expected at a particular location, and devising reliable mitigation strategies. Alluvial Fan Flooding attempts to improve our capability to determine whether areas are subject to alluvial fan flooding and provides a practical perspective on how to make such a determination. The book presents criteria for determining whether an area is subject to flooding and provides examples of applying the definition and criteria to real situations in Arizona, California, New Mexico, Utah, and elsewhere. The volume also contains recommendations for the Federal Emergency Management Agency, which is primarily responsible for floodplain mapping, and for state and local decisionmakers involved in flood hazard reduction.
Book Synopsis Isotope Tracers in Catchment Hydrology by : C. Kendall
Download or read book Isotope Tracers in Catchment Hydrology written by C. Kendall and published by Elsevier. This book was released on 2012-12-02 with total page 870 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book represents a new "earth systems" approach to catchments that encompasses the physical and biogeochemical interactions that control the hydrology and biogeochemistry of the system. The text provides a comprehensive treatment of the fundamentals of catchment hydrology, principles of isotope geochemistry, and the isotope variability in the hydrologic cycle -- but the main focus of the book is on case studies in isotope hydrology and isotope geochemistry that explore the applications of isotope techniques for investigating modern environmental problems. Isotope Tracers in Catchment Hydrology is the first synthesis of physical hydrology and isotope geochemistry with catchment focus, and is a valuable reference for professionals and students alike in the fields of hydrology, hydrochemistry, and environmental science. This important interdisciplinary text provides extensive guidelines for the application of isotope techniques for all investigatores facing the challenge of protecting precious water, soil, and ecological resources from the ever-increasing problems associated with population growth and environmental change, including those from urban development and agricultural land uses.
Book Synopsis The Seine River Basin by : Nicolas Flipo
Download or read book The Seine River Basin written by Nicolas Flipo and published by Springer Nature. This book was released on 2021-01-30 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book reviews the water-agro-food and socio-eco-system of the Seine River basin (76,000 km2), and offers a historical perspective on the river’s long-term contamination. The Seine basin is inhabited by circa 17 million people and is impacted by intensive agricultural practices and industrial activities. These pressures have gradually affected its hydrological, chemical and ecological functioning, leading to a maximum chemical degradation between the 1960s and the 1990s. Over the last three decades, while major water-quality improvements have been observed, new issues (e.g. endocrine disruptors, microplastics) have also emerged. The state of the Seine River network, from the headwaters to estuary, is increasingly controlled by the balance between pressures and social responses. This socio-ecosystem provides a unique example of the functioning of a territory under heavy anthropogenic pressure during the Anthropocene era. The achievements made were possible due to the long-term PIREN Seine research program, established in 1989 and today part of the French socio-ecological research network “Zones Ateliers”, itself part of the international Long-term Socio-economic and Ecological Research Network (LTSER). Written by experts in the field, the book provides an introduction to the water budget and the territorial metabolism of the Seine basin, and studies the trajectories and impact of various pollutants in the Seine River. It offers insights into the ecological functioning, the integration of agricultural practices, the analysis of aquatic organic matter, and the evolution of fish assemblages in the Seine basin, and also presents research perspectives and approaches to improve the water quality of the Seine River. Given its scope, it will appeal to environmental managers, scientists and policymakers interested in the long-term contamination of the Seine River.
Book Synopsis Volcanoes of the Central Andes by : Shanaka L. De Silva
Download or read book Volcanoes of the Central Andes written by Shanaka L. De Silva and published by Springer. This book was released on 1991 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rockglaciers written by Dietrich Barsch and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rockglaciers are the visible expression of the creep of mountain permafrost. They are indicative of special geo-ecologic and geomorphic conditions regarding thermal situation, talus production, hydrology, and hazards in high mountain environments of all major mountain systems on earth. As relict features, they are of great paleoclimatic value. This book presents a systematic treatment of this landform in its environmental context.
Book Synopsis Andean Magmatism by : Russell S. Harmon
Download or read book Andean Magmatism written by Russell S. Harmon and published by . This book was released on 1984 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Remote Compositional Analysis by : Janice L. Bishop
Download or read book Remote Compositional Analysis written by Janice L. Bishop and published by Cambridge University Press. This book was released on 2019-11-28 with total page 655 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive overview of the spectroscopic, mineralogical, and geochemical techniques used in planetary remote sensing.
Book Synopsis From Habitability to Life on Mars by : Nathalie A. Cabrol
Download or read book From Habitability to Life on Mars written by Nathalie A. Cabrol and published by Elsevier. This book was released on 2018-06-29 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: From Habitability to Life on Mars explores the current state of knowledge and questions on the past habitability of Mars and the role that rapid environmental changes may have played in the ability of prebiotic chemistry to transition to life. It investigates the role that such changes may have played in the preservation of biosignatures in the geological record and what this means for exploration strategies. Throughout the book, the authors show how the investigation of terrestrial analogs to early Martian habitats under various climates and environmental extremes provide critical clues to understand where, what and how to search for biosignatures on Mars. The authors present an introduction to the newest developments and state-of-the-art remote and in situ detection strategies and technologies that are being currently developed to support the upcoming ExoMars and Mars 2020 missions. They show how the current orbital and ground exploration is guiding the selection for future landing sites. Finally, the book concludes by discussing the critical question of the implications and ethics of finding life on Mars. Edited by the lead on a NASA project that searches for habitability and life on Mars leading to the Mars 2020 mission Presents the evidence, questions and answers we have today (including a summary of the current state of knowledge in advance of the ESA ExoMars and NASA Mars 2020 missions) Includes contributions from authors directly involved in past, current and upcoming Mars missions Provides key information as to how Mars rovers, such as ExoMars and Mars 2020, will address the search for life on Mars with their instrumentation
Book Synopsis Recognition of Ancient Sedimentary Environments by : J. Keith Rigby
Download or read book Recognition of Ancient Sedimentary Environments written by J. Keith Rigby and published by . This book was released on 1972 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis MOUNTAIN GEOMORPHOLOGY by : Phil Owens
Download or read book MOUNTAIN GEOMORPHOLOGY written by Phil Owens and published by Routledge. This book was released on 2014-02-04 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mountains represent one of the most inspiring and attractive natural features on the surface of the earth. Visually, they dominate the landscape. However, the increasing realization of the fragility of mountain areas because of changes in land use, management and climate, combined with an understanding of their importance for water and other natural resources, has resulted in a growing interest in mountain environments in recent years. Hence, Mountain Geomorphology represents a timely and unique contribution to the literature. Written by a team of international experts, this book is divided into three sections, which consider historical, functional and applied mountain geomorphology from both global and local perspectives. Historical mountain geomorphology focuses on the evolution of landforms. Functional mountain geomorphology emphasises the interaction between processes and landforms, while applied mountain geomorphology concerns the interrelationships between geomorphological processes and society. Mountain Geomorphology is a valuable source of information for students studying mountain geomorphology, and also for academics and research scientists interested in mountain environments.
