Lassen Volcanic National Park has several types of rocks in one location. It is an unusual mix of all three (igneous, sedimentary, and metamorphic). What does each rock type tell us about the area’s geologic history? Key words and concepts covered are rocks as evidence of past events, plate tectonics, convergent boundary, subduction zone, and metamorphic rocks. Crosscutting concepts explored are patterns, cause and effect, systems and system models, and energy and matter. This book selection includes the Table of Contents, Preface, Catalog of Problems, Acknowledgments, About the Authors, and Index.ex.