Site Index

• Home
• About Volcanoes
  • Volcanic Processes
    • Volcanic Eruptions
      • Eruption Classifications
      • Volcanic Explosivity Index (VEI)
      • Directed and Lateral Blasts
  • Volcanoes & Volcanic Landforms
    • Types of Volcanoes
    • Erosional Volcanic Landforms
  • Craters & Other Volcanic Features
  • Lava Flows and Other Volcanic Deposits
    • Lava Flows
      • Basaltic Lava Flows
      • Columnar Jointing
    • Pyroclasts and Pyroclastic Rocks
  • Plate Tectonics and Volcanoes
  • Stories from Around the NPS
• Volcanic Geoheritage
  • World Heritage Volcanoes
  • Traditional Knowledge of Prehistoric Eruptions
• Be Geohazard Aware
  • USGS Volcano Observatories
• Visit Volcanic Parks
  • Volcanic Parks Master List
  • Primary Volcanic Parks
  • Celebrate Volcano Week!
  • Volcanic Parks in the NPS—A Quick History
  • Volcano Types in Parks
  • Prehistoric and Historic Eruptions
  • Volcanic Points of Interest in Parks and NNLs
• What We Do
• Education
  • Volcano Lessons from Parks
  • Anatomy of a Volcano
  • Photos and Multimedia
  • Glossary of Volcanic Terms
  • Geologic Map Gallery
  • Park Geology Albums
  • Geologic Reports—Volcano Parks
  • Geodiversity Atlas—Volcano Parks
  • Monitoring Volcanoes—Student Page