1,545,259 views 203 on YTPak
2,294 262

Published on 12 Nov 2012 | over 4 years ago

Watch more films and find learning materials at www.twig-world.com
The cycle of lava as a destructive and constructive force, building the structure of volcanoes and powering their devastating impact.

Watch more films like this on www.twig-world.com

Loading related videos...