Image Sources
(1) http://en.wikipedia.org/wiki/File:MtRedoubtedit1.jpg. Public Domain.(2) http://en.wikipedia.org/wiki/Shield_volcano. GNU-FDL.(3) Pillow lava.. GNU-FDL.(4) http://en.wikipedia.org/wiki/Mt._St._Helens. GNU-FDL.(5) Mount Merapi, Indonesia.. GNU-FDL.(6) http://en.wikipedia.org/wiki/Lava#Unusual_lavas. GNU-FDL.(7) http://en.wikipedia.org/wiki/Hot_spring#Hot_springs_around_the_world.
GNU-FDL.(8) http://en.wikipedia.org/wiki/Earth_observation_satellite. GNU-FDL.(9) http://en.wikipedia.org/wiki/Mid-Atlantic_Ridge. GNU-FDL.(10) http://en.wikipedia.org/wiki/Mt._Fuji. GNU-FDL.
(11) Pāhoehoe lava. GNU-FDL.
(12) http://en.wikipedia.org/wiki/Lava#Lava_cascades_and_fountains. GNU-FDL.
(13) A’a lava flow.. GNU-FDL.
(14) http://en.wikipedia.org/wiki/Volcanic_cone. GNU-FDL.
(15) http://en.wikipedia.org/wiki/Stratovolcano. GNU-FDL.
(16) http://en.wikipedia.org/wiki/Hawaiian_Islands. GNU-FDL.
(17) http://en.wikipedia.org/wiki/Old_Faithful_Geyser. GNU-FDL.
(18) http://en.wikipedia.org/wiki/Image:Hawaiilavawestcoast.JPG. GNU-FDL.
(19) http://commons.wikimedia.org/wiki/File:Napoli_and_Vesuvius.jpg,.
GNU-FDL.
(20) http://en.wikipedia.org/wiki/Caldera. GNU-FDL.
(21) http://en.wikipedia.org/wiki/Mauna_Loa. GNU-FDL.
(22) http://en.wikipedia.org/wiki/Eldfell. GNU-FDL.
(23) USGS.http://commons.wikimedia.org/wiki/File:
World_tectonic_plate_map_large.png. Public Domain.