"Petrified forests can be found across the United States and are a feat of natural science! When wood becomes petrified, minerals replace the plant material, and it hardens. Whats left is a colorful remnant that looks something like the former tree. Through this adventure through petrified forests, readers will discover how different kinds of fossils are made. With beautiful full color photographs of these trees and approachable text, readers will deepen their understanding of how these strange fossils form"--.