Monday, November 23, 2009

Review




Parts of a Volcano:


Central Vent: Opening from which lava flows


Magma Chamber: source of molten materials that flow to surface during eruption


Conduit/Fissure: Connects vent to magma reservoir


Caldera: bowl-like depression at the top of a volcano, can be created either by collapse caused by empty magma reservoir or by volcano blowing its top off


Types of Eruptions:


Hawaiian: Lava Streams


Strombolian: Huge clots of molten lava burst from summit crater to form luminous arcs through sky


Vulcanian: Dense cloud of ash-laden gas explodes and rises above peak


Plinian: most powerful eruption, explosive ejection of viscous lava, ash and gas travel tens of miles into air (featured in picture)

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