Skip to main content
Volcano World
Search
Search
Open Search Page
Home
Volcanoes
Famous Volcanoes
Central Andes (Under Construction)
Hawaiian Volcanism
Mount Saint Helens
Volcanoes of Japan
Etna
Extraterrestrial Volcanoes
For Teachers
Teaching Resources
Mount St Helens Living Lab
Earth Science Lessons
Plate Tectonics
Rocks and Minerals
Prehistoric Earth
All About Volcanoes
Types of Volcanoes
Eruption Styles
Submarine Volcanoes
Lava Domes
Columnar Jointing
Hydrovolcanism
Volcanogenic Tsunamis
Volcanic Minerals
Volcanic Gases
Volcanic Lightning
Volcanic Sounds
Volcanic Hazards
Learn More
Glossary
US Volcano Activity Map
Volcano Factoids
Building Volcano Models
Calendar
Interviews with Volcanologists
Working on Volcanoes
Adventures and Fun
For Kids
Volcano Games
Virtual Volcano Fieldtrips
Virtual Altiplano
Virtual Altiplano Bolivia
Around Santorini
Climbing Mt Asama
Driving Kilauea Rim Drive
Exploring the Canary Islands
Hiking Mount Ijen
To the Top of Beerenberg
Volcano Folklore
Volcanic Parks
Volcano Gallery
About
Contact Us
FAQs
Breadcrumb
Volcano World
Definitions
Spines
Spines
Horn-like projections formed upon a lava dome.
