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Types of Volcanoes
Fundamentally there are 4 types of volcanoes. Each exhibit a specific eruptive style, composition and appearance:
Cinder Cone Volcano
Steep, symmetrical, straight-sided cinder cones are made of loose, angular, volcanic rock fragments that spray/fall from the eruption cloud and accumulate above a vent.
Example: SP Crater |
Dome Volcano
Lava domes are rounded, bulging, steep-sided mounds of silica-righ lava that is too viscous to flow very far from vent before cooling solid.
Example: Mount Elden |
Shield Volcano
Fluid basaltic lavas that can flow easily across the ground tend to build massive, low-angled slope and shield-shaped profile.
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Stratovolcano
The flanks of these often massive, steep-sloped volcanoes are built up of alternating layes of rock between viscous and pyroclastic deposits. Eruptions are violent often followed by pyroclastic flows.
Example: San Francisco Peak |


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Steep, symmetrical, straight-sided cinder cones are made of loose, angular, volcanic rock fragments that spray/fall from the eruption cloud and accumulate above a vent.
Lava domes are rounded, bulging, steep-sided mounds of silica-righ lava that is too viscous to flow very far from vent before cooling solid.
Fluid basaltic lavas that can flow easily across the ground tend to build massive, low-angled slope and shield-shaped profile.
The flanks of these often massive, steep-sloped volcanoes are built up of alternating layes of rock between viscous and pyroclastic deposits. Eruptions are violent often followed by pyroclastic flows.