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Full Description
Earth has existed for an immense period of time—an almost unimaginable 4.6 billion years. If we ventured far enough into the past, would we reach a time when our planet was fundamentally different? Did it always have landscapes like those we see today, sculpted by wind, rain, and the forces of plate tectonics? When did Earth turn into the distinctive "blue planet" where life could emerge and evolve?
Geologist Simon Lamb shows that the key to answering these questions lies in ancient rocks from the days when the planet was young. His research in remote southern Africa looks at some of the oldest known rocks—some more than 3.5 billion years old—which have survived unfathomable spans of geological time. He takes readers on a journey of scientific discovery, walking—and sometimes diving—through landscapes from the time of the earliest documented forms of life. Lamb unearths a violent world of volcanic eruptions, natural disasters, and profound geological forces in the deep ocean, along ancient shorelines, and amid rising mountains. In so doing, he shows how geologists work and think, and how they read rocks and decipher what they tell us about the past. Finding the foundations of our world, The Oldest Rocks on Earth sheds light on why Earth is the only planet known to harbor life and what this might tell us about our future.
Contents
Preface
Act I
1. Some Beginnings
2. Makhonjwa Mountains
Act II
3. World of Oceans
4. On the Edge
5. Shifting Landscapes
Interlude
6. King Solomon's Mines
Act III
7. The Face of the Earth
8. A Partner for Life
Glossary
Further Reading
Index
