hazards -types of volcanoes Flashcards
how many types of volcanoes are there?
6
what are the 6 types of volcanoes?
.fissure
.shield
.dome
.ash-cinder
.composite
.caldera
what are the characteristics of a fissure volcano?
.gentle basaltic slope of lava
.low silica content lava
.basic
.effusive
what are the characteristics of a shield volcano?
.vent of magma
.gentle slope of basaltic lava flow
.low silica content lava
.basic
.effusive
what are the characteristics of a dome volcano?
.vent of magma
.steep convex slope from thick, fast cooling lava
.low silica content lava
.basic
.basaltic lava
.explosive
what are the characterises of a ash-cinder volcano?
.vent of magma
.fine ash
.cinder
.medium silica content lava
.basic or acidic
.basaltic or andesitic
.explosive
what are the characteristics of a composite volcano?
.vent of magma
.branch pipe of lava
.ash
.high silica content lava
.acidic
.andesitic
.explosive
what are the characterises of a caldera volcano?
.magma
.ash walls
.old cone + new cone
.caldera (bumps)
.very high silica content lava
.acidic
.explosive