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VolcanoesVolcanoes
Parts of a volcano.Types of volcanoes.Composite – Shield volcanoes.Volcano vocabulary.
Volcano parts
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CompositeComposite Shield
Volcanic
structureSteep slopeSteep slope
Broad, gentle slope
Composite Shield
Tectonic
environmentConvergent b.(subduction
zones)
Divergent b.+
hot spots
Composite Shield
Rock type andesite basalt
Composite Shield
Lava
temperature 800º C 1100º C
Composite Shield
Lava
viscousityHigh Low
Composite Shield
Eruptive
styleExplosive Quiescent
Composite Shield
Examples Mt St HelensMauna Loa
(Hawaii)
Lava
http://vi.sualize.us/view/8f3a44bcfc33726c4d105d3e31e21831/
Molten rock that erupts from a Molten rock that erupts from a volcano that solidifies as it cools.volcano that solidifies as it cools.
LavaLava
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A light, porous, glassy lava, A light, porous, glassy lava, used in solid form as an used in solid form as an
abrasive and in powdered form abrasive and in powdered form as a polish and an abrasive.as a polish and an abrasive.
PumicePumice
A round or pear-shaped mass A round or pear-shaped mass of volcanic rock, solidified from of volcanic rock, solidified from
molten lava that has been molten lava that has been thrown into the airthrown into the air
BombBomb
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Fragments of lava or rock Fragments of lava or rock smaller than 2 mm in size that smaller than 2 mm in size that
are blasted into the air by are blasted into the air by volcanic explosions.volcanic explosions.
AshAsh
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Molten rock beneath Earth's surface.
MagmaMagma
Mouth of a volcano - surrounds Mouth of a volcano - surrounds a volcanic vent. a volcanic vent.
CraterCrater
http://vi.sualize.us/view/8f3a44bcfc33726c4d105d3e31e21831/
rocks formed from the solid fragments ejected during a
volcanic eruption
PyroclastsPyroclasts
http://vi.sualize.us/view/119ae4cbc213f8a99f95205f9d613300/
A broad volcano built up from A broad volcano built up from the repeated nonexplosive the repeated nonexplosive
eruption of basalt to form a low eruption of basalt to form a low domedome
Shield volcanoShield volcano
A flow of pyroclastic material A flow of pyroclastic material mixed with watermixed with water on the flanks on the flanks
of a volcanoof a volcano
LaharLahar
http://www.thefreedictionary.comhttp://www.thefreedictionary.com