about / contact / guestbook / maillist / policy / sitemap / shop / learn on the internet

   
     
     
     
You are here: home > geotopics > volcanoes > what is a volcano?

Volcanoes menu
What is a volcano?
What are the main features of a volcano?
What are active, dormant and extinct volcanoes?
What are the different types of volcano?
Where are volcanoes located?
What is the Ring of Fire?
What are lahars and pyroclastic flows?
Why do people live close to volcanoes?

Case Studies
The 1980 eruption of Mount St Helens
The 1991 eruption of Mount Pinatubo

The 2000 eruption of Popocatepetl

Popocatepetl, Mexico (2000)
 

What is a volcano?
What is a volcano?
What are the main features of a volcano?
What are active, dormant and extinct volcanoes?

What is a volcano?
A volcano is a conical hill or mountain formed by material from the mantle being forced through an opening or vent in the Earth's crust.

back to top

What are the main features of a volcano?

back to top

What are active, dormant and extinct volcanoes?
Volcanoes are found in three states - extinct, dormant and active. An extinct volcano will never erupt again. A dormant volcano has not erupted in 2000 years. An active volcano has erupted recently and is likely to erupt again.

 

 
Online Activities
[Online activities]: n Activities related to this topic
Volcanoes - Fling the teacher game
Podcast
[Podcast]: n Audio file for playback on mobile devices and personal computers
 


 
     
Internet Geography © 2012