Evolution Of Early Earth S Atmosphere Hydrosphere And Biosphere

"The history of Earth's early atmosphere, hydrosphere, and biosphere, from Hadean through Proterozoic time, is one of geology's enduring puzzles. Ore deposits provide important insights into this history because they contain elements and minerals that are highly sensitive to the geochemical environment in which they form. Just what these minerals tell us remains a matter of considerable debate, however. When and how did life develop, an oxygen-rich atmosphere form, and sulfate dominate the ocean? This volume contains reports on these questions from both sides of the aisle for iron and manganese formations, uranium paleoplacers and hydrothermal deposits, and exhalative sulfides and oxides."--Publisher's website.

When did life first appear on Earth and what form did it take? The answer to this intriguing and fundamentally important question lies somewhere within the early Archean rock record. The young Earth was, however, a very different place to that we know today and numerous pitfalls await our interpretation of these most ancient rocks. The first half of this practical guide equips the reader with the background knowledge to successfully evaluate new potentially biological finds from the Archean rock record. Successive steps are covered, from locating promising samples in the field, through standard petrography and evaluation of antiquity and biogenicity criteria, to the latest state of the art geochemical techniques. The second half of the guide uniquely brings together all the materials that have been claimed to comprise the earliest fossil record into an easily accessible, fully illustrated format. This will be a handbook that every Archean geologist, palaeobiologist and astrobiologist will wish to have in their backpack or on their lab-bench.

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The book reviews the current physical theory of Earth's global evolution, its origin, structure and composition, the process of Earth's core formation, Earth's energy, and the nature of its tectonomagnetic activity. The book also deals with the origin of the Moon and its influence on our planet's evolution. Based on the integral positions of this theory, the book analyzes the issues of the origin of the hydrosphere and atmosphere, and the conception and evolution of life on Earth. The monograph also reviews the adiabatic theory of the greenhouse effect developed by the authors, and the effects of nitrogen-consuminging bacteria and of periodic changes in the precession angle on its climate. In particular, these effects cause the onset and periodicity of ice ages and a significant climate warming during the periods of supercontinent appearance (like Pangaea in the Mid-Mesozoic). * challenges current thinking about climate change on the basis of sound geological data. * helps the reader make informed decisions about Earth-process related problems. * challenges the reader to critically analyze both theory and data

Earth's Evolving Systems: The History Of Planet Earth Is Intended As An Introductory Text That Examines The Evolution Of The Earth And Its Life From A Systems Point Of View. The Text Covers Major Topics Like The Lithosphere, Hydrosphere, Atmosphere, And Biosphere, And Discusses How These Systems Interacted With Each Other And Evolved Through Geologic Time. The Author Takes Care To Integrate The Current State Of Our Earth Systems With Those Of The Past In An Effort To Develop Students' Interests In Earth System In General. It Begins With By Examining The Basics Of Earth Systems, Including Discussions Of Sedimentation, Evolution, Stratigraphy, And Plate Tectonics. Part Two Looks At The Beginning Of Time With The Origin Of The Earth And Discusses Its Early Evolution, Through The Origin Of Life And Its Evolution To Multiculluraity. The Third Section Goes On To Cover The Paleozoic Through The Neogene Eras, Discussing Topics Such As Tectonics, Mountain Building, Sea Level, Climate, Life, And Mass Extinctions In Each Era. The Final Part Moves On To The Modern World, Discussing The Interactions Between Humans And Earth Systems, With An Emphasis On The Climatic System. Key Features Of Earth's Evolving System: - Presents The Earth As A Continuously Evolving And Dynamic Planet Whose History Consists Of A Succession Of Vastly Different Worlds Very Much Unlike Our Modern Earth. - Discusses The Scientific Method In Chapter 1, Emphasizing How Historical Geology Differs From The Standard "Scientific Method" Presented As The Paradigm Of Experimental Sciences And Of All Science. - Bridges Traditional Historical Geology Texts By Discussing Historical Information In The Context Of The Interaction And Integration Of Earth Systems Through Geologic Time By Using The Tectonic (Wilson) Cycle As A Unifying Theme. - Concentrates On North America But Offers A Global Perspective On Earth Systems On Processes Such As Orogenesis, Seaways, And Ocean Circulation, The Evolution Of Life, And Mass Extinction. - Discusses Rapid Climate Change And Anthropogenic Impacts In The Context Of A Continuously Evolving Earth Whose Environments Are Now Being Altered By Anthropogenic Climate Change. - End-Of-Chapter Materials Include: General Review Questions, More Challenging "Food For Thought" Questions, Key Terms Listing, And A "Sources And Further Readings" Section. - Boxes Throughout The Text Highlight Interesting Bits Of Related Information, Unusual Occurrences, Or Elaborates On Material Presented In The Text

Ancient ice ages are revealed by distinctive stratal facies that tell us much about the times of coolness and how the climate system works. Several strong ice ages were recorded in the late Paleozic time and during transitions from the Devonian in to the Carboniferous and from the Ordovician in to the Silurian. In Precambrian time, several are documented for both the late and early Proterozoic age. This title explores findings on the pre-Mesozoic ice ages, examining climate in relation to tectonobiogeochemical activities rooted in the changing earth-air-ocean system.

This book provides a comprehensive treatment of the chemical nature of the Earth’s early surface environment and how that led to the origin of life. This includes a detailed discussion of the likely process by which life emerged using as much quantitative information as possible. The emergence of life and the prior surface conditions of the Earth have implications for the evolution of Earth’s surface environment over the following 2-2.5 billion years. The last part of the book discusses how these changes took place and the evidence from the geologic record that supports this particular version of early and evolving conditions.

The authors of this book have studied the changes in the chemi cal composition of the atmosphere during geological history with regard to its close relationship to the evolution of the Earth's sedimentary shell. Beginning in 1977, the initial results of this study have been published as articles and parts of several monographs. Since new material clarifying atmospheric evolution have been obtained recently, the necessity has arisen to write a book treating the major results of investigations of the history of the atmosphere. In this book much consideration is given to the interrelation between the evolution of animate nature and changes in atmospheric composition. It proved be necessary to study the history of the two components of atmospheric air: carbon dioxide and oxygen. Attempts have been made to repre sent quantitatively the conclusions drawn here, i. e. to determine by calculation the changes in the amount of carbon dioxide and oxygen over much of the history of the atmosphere. These calculations, performed in most detail for the Phanerozoic and to a lesser degree for the Late Precambrian, are supplemented with estimates of changes in the chemical composition of the atmosphere in the Early Precambrian. Comparisons have been drawn between the changes in the chemical composition of the atmosphere and the development of animate nature, a close relationship being found to exist between the stages of the evolution of organisms and variations in the chemical composition of the atmosphere.