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15 Cards in this Set

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