Includes bibliographical references and index.

"Deep valleys and gorges cut across landscapes around the world. But how do they form? And how have we learned to harness power from the deep splits in the ground? Explore more about these landforms with easy-to-understand content tied to the curriculum of upper-elementary and middle school students and text written at a 2nd to 3rd grade reading level. Dyslexia-friendly font and design make learning accessible, and a recap at the end promotes checking for understanding to aid in comprehension. It's key geology curriculum made approachable for all"--,Provided by publisher.