Vast and majestic, the Grand Canyon represents one of science's most challenging puzzles: How did this massive canyon come to be? This is the story of the search for the answers, and the first account of the consensus geologists have reached in the last few years.
A scientific detective tale packed with colorful characters, Grand Canyon follows the explorers, adventurers, and geologists whose efforts led to the understanding of the canyon's mysteries. Modern scientists have revealed that the Colorado River once ran in the opposite directionand for many years flowed hundreds of feet beneath the ground. These efforts also led directly to the discovery of tectonic plates, one of the most important advancements in the history of geology. An eloquent, breathtaking narrative, Grand Canyon is a fascinating true story that is as epic as its subject. BACKCOVER: “Powell's well-crafted account makes one appreciate just how [the Grand Canyon] came to be so grand.”
“Grand Canyon will be enjoyed by anyone who is curious about how geologists think, piece together disparate information, and assemble explanations.”
“What many readers will walk away with is a sense of the awesome power of water running over the surface of the earth.”
|Publisher:||Penguin Publishing Group|
|Product dimensions:||5.54(w) x 8.50(h) x 0.73(d)|
|Age Range:||18 Years|
About the Author
JAMES LAWRENCE POWELL is executive director of the National Physical Science Consortium, and former director and president of the Los Angeles County Museum of Natural History. He is the author of Night Comes to the Cretaceous and Mysteries of Terra Firma.
Table of Contents
I. A BRIEF HISTORY OF AWE.
1. Six Feet.
2. Water Catch 'Em.
3. How Old Is a River?
4. The Saw That Cut the Mountain.
5. Seven Cities of Gold.
II. SECRETS OF THE RIVER.
6. America's Greatest Geologists.
7. The Sublimest Thing.
8. Earth's Engine.
9. Where Everything Is Exposed.
10. Antecedence in Doubt.
11. The Same River Twice?
III. A NEW THEORY.
13. Canyon Makers.
14. Lazarus and Lakes.
15. Molten Rock, Melted Snow.
16. What Caused the Grand Canyon?
Key Terms and Places.