Volcanoes


 * aa
 * basal wreck
 * basalt
 * base surge
 * blowhole
 * bomb
 * caldera
 * cataclysm
 * cinder cone
 * clastic
 * crater
 * dormant
 * eruption
 * fumarole
 * lahar
 * lava
 * lava tree
 * lava tube
 * magma
 * monticule
 * nuee ardente
 * obsidian
 * pahoehoe
 * paroxysm
 * plug
 * pumice
 * pyroclastic flow
 * pyrotechnics
 * seismograph
 * shield volcano
 * tephra
 * tiltmeter
 * vulcanist
 * Vulcanus