http://www.gso.uri.edu/lava/MagmaProperties/Assets/viscosity.jpg
http://www.earth.northwestern.edu/people/seth/202/lectures/Comp/magviscosity_web3.htm
http://volcano.oregonstate.edu/what039s-difference-between-magma-and-lava-and-where-do-these-terms-come
http://regentsearth.com/ILLUSTRATED%20GLOSSARY/Glossary%20Pix/MagmaLava.jpg
http://dailygenius.com/wp-content/uploads/2014/09/volcano.jpg
http://www.earth.northwestern.edu/people/seth/202/lectures/Comp/magviscosity_web3.htm
http://volcano.oregonstate.edu/what039s-difference-between-magma-and-lava-and-where-do-these-terms-come
http://regentsearth.com/ILLUSTRATED%20GLOSSARY/Glossary%20Pix/MagmaLava.jpg
http://dailygenius.com/wp-content/uploads/2014/09/volcano.jpg