Download or read book Canyons written by Erik A. Hanson and published by Infobase Publishing. This book was released on 2007 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chronicles the origins, history, and structure of the world's most famous gorges, from North America's Grand Canyon to western Australia's Windjana Gorge. This book also discusses tectonic activity, undersea canyons, liquid rock, and pinpoints scientific studies and modern-day ecological challenges.