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15 Cards in this Set
- Front
- Back
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Where lava leaks through fractures in the earth's crust
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Fissure
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Area below a volcano where molten rock rises into the crust; very large
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Magma Chamber
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Small depression at the summit of a volcano
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Crater
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Mountain-shaped structure surrounding the main vent
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Cone
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Large depression created when the volcano collapses into magma chamber
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Caldera
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This vent leads to the magma chamber
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Primary Vent
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This vent leads to the main vent
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Secondary Vent
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Channel through which magma passes to erupt from volcano
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Vent
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Formed by layers of basaltic, related to pahoehoe basalt flows
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Shield cone composition
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Broad, sloping sides, largest type of volcano; circular base
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Shield cone shape and size
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Example: Hawaiian volcanoes (Mauna Loa, Manakea)
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Example of a Shield cone
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Formed by alternating eruptions making layers of volcanic fragments or lava; associated with rhyolitic or basaltic lava
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Composite cone composition
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Mid-sized volcano; steep sided(less steep than cinder cone)
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Composite cone shape and size
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Example: Cascade Volcanoes (Mt ST. Helens, Mt. Rainer)
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Example of a Composite cone
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Formed by piles of ejected material around a vent; rhyolitic or andesitic lava
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Cinder cone composition
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