TABLE OF CONTENTS 4 8 CHAPTER 1 Eruption CHAPTER 2 Forming Calderas CHAPTER 3 Supervolcanoes Today ACTIVITIES TOOLS Try This Glossary Index To Learn More 16 22 23 24 24
CHAPTER 1 ERUPTION This is Lake Toba It is in Indonesia This lake was not always here What formed it Lake Toba 4 CHAPTER 1
A supervolcano It erupted more than 70,000 years ago The volcano collapsed It created a depression called a caldera It filled with water This is where Lake Toba now sits CHAPTER 1 5
