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Full Description
The air we breathe is twenty-one percent oxygen, an amount higher than on any other known world. While we may take our air for granted, Earth was not always an oxygenated planet. How did it become this way? Donald Canfield--one of the world's leading authorities on geochemistry, earth history, and the early oceans--covers this vast history, emphasizing its relationship to the evolution of life and the evolving chemistry of the Earth. Canfield guides readers through the various lines of scientific evidence, considers some of the wrong turns and dead ends along the way, and highlights the scientists and researchers who have made key discoveries in the field. Showing how Earth's atmosphere developed over time, Oxygen takes readers on a remarkable journey through the history of the oxygenation of our planet.
Contents
Acknowledgments ix Preface xi Chapter 1. What Is It about Planet Earth? 1 Chapter 2. Life before Oxygen 13 Chapter 3. Evolution of Oxygenic Photosynthesis 26 Chapter 4. Cyanobacteria: The Great Liberators 41 Chapter 5. What Controls Atmospheric Oxygen Concentrations? 56 Chapter 6. The Early History of Atmospheric Oxygen: Biological Evidence 72 Chapter 7. The Early History of Atmospheric Oxygen: Geological Evidence 85 Chapter 8. The Great Oxidation 98 Chapter 9. Earth's Middle Ages: What Came after the GOE 110 Chapter 10. Neoproterozoic Oxygen and the Rise of Animals 123 Chapter 11. Phanerozoic Oxygen 138 Chapter 12. Epilogue 153 Notes 159 References 175 Index 189
