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Caldera
Volcanoes |
Cone
Volcanoes |
Lava Dome Volcanoes |
Shield
Volcanoes |
Strato
Volcanoes |
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| Stratovolcanoes
have steep sides with cones that stick out like huge bumps. They are
built up when eruptions of viscous
lava, tephra, and pyroclastic flows happen. It takes thousands of
years for the pressure to build up enough in stratovolcanoes to cause
an eruption. More than one kind of magma builds up in stratovolcanoes.
They are basalt, andesite, dacite, and rhyolite magma. All of those
magmas cause explosive eruptions except basalt magma. There are a
lot of different vents around stratovolcanoes. Some of the vents are
cinder cones and domes low on the sides of the volcano. Sometimes
stratovolcanoes are called composite
cones. |
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