Three Types of Volcanoes

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Three Types of Volcanoes
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Shield Volcanoes

• Low silica level
• Low viscosity Lava
• High or low levels of gas
• Low to medium explosivity
• Flattened mound
• Resembles a warriors shield

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Mauna Loa, Hawaii
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Piton de la Fournaise
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Surtsey, Finland
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Composite Volcanoes

• High in silica
• High viscosity magma
• High levels of gas
• Highly explosive
• Cone shaped
• Formed by layers of lava and ash

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Mt. Rainier, Washington
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Mt. Fuji, Japan
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Mt. St. Helens, Washington
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Cindercones

• Low silica lava
• High levels of gas
• Fire-fountain eruptions
• Commonly found on the flanks of shield volcanoes
• Made from a pile of rock pieces
• Structurally weak

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Pu'u ka Pele, Hawaii(on the flanks of Mauna Loa)
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Floreana Island, Galapagos
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Puu OO, Hawaii