The bones of a Tyrannosaurus rex have been found in a rocky mountainside. But how did they get there? In this book, discover how a dinosaur’s body became rocky fossils in a process that took 66 million years. And learn how it’s not just bones that become fossils. . . teeth, footprints and even prehistoric poo can also turn to rock! This book band green reader explains the fascinating process of how dinosaurs became fossils. It features repetitive and predictable text, high-frequency and familiar sight words, close text and picture matches and lots of labels.