The Grand Canyon: This Place Rocks/Joanne Mattern

Contributor(s): Author: Joanne Mattern One of the most visited places in North America, Grand Canyon National Park is like an open window to Earth's geologic history. The carving of the canyon's walls by erosion left a cross-section of the Earth's crust from millions and millions of years ago. See for yourself how grand and beautiful this gorgeous gorge really is.   Review citations School Library Journal - 11/01/2017