America's Mountains: An Exploration of Their Origins and Influences from the Alaska Range to the Appalachians

Journeys back to prehistoric times to explain the origins of North America's mountains & to anticipate future changes in their evolution. Begins with an exploration of orogeny, the process of mountain building, which began millions of years ago when a combination of violent earthquakes & volcanic eruptions shook the Earth. Investigates the influence of mountains on plants, animals, people & the environment. Includes fascinating descriptions of landmark geologic forms, such as the Rocky & Appalachian Mountains & glaciers in Canada & Alaska. Detailed info. on rocks & fossils, & on mountains that have been eroded out of existence.