A ROCK IS BORN

“Forged in fire” and “cooled by air,” a rock born from a volcanic explosion 115 million years ago undergoes dramatic shifts throughout its long life.

Readers first glimpse the rock from an unusual perspective: through the chunky legs of a dinosaur. As time passes, mammals and birds replace dinosaurs, and the rock changes as well: “Rain softens it. Wind whittles it.” Mud and water eventually sweep the rock into the sea—a dynamic scene that requires readers to turn the book to follow its trail. Water eventually transforms the rock into a grain of sand until it undergoes its sedimentary phase, depicted in a beautiful cutaway scene as layers of plants and animals press down upon the rock. Accompanied by Williams’ bold, color-saturated images, Ho’s simple, declarative sentences move the action along at a swift clip. “Plates collide. Mountains grow.” The rock disappears underground, where it undergoes its metamorphic phase of heating, melting, and transforming. In 1980, a volcanic eruption (Mt. St. Helens, per the backmatter) thrusts the newborn rock onto the ground of a contemporary national park, where a diverse group of people learn about its history.

An appropriately fast-moving and energetic chronicle.