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15 Cards in this Set
- Front
- Back
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Smallest volcano type; has very steep sides
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Cinder cone shape and size
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Example: Izalco, El Salvador
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Example of Cinder cone
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Low viscosity, very little gas, 52% or less silica
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Basaltic magma composition
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Quiet eruptions (lava flow)
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Basaltic magma eruption
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Due to rocks in upper mantle
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Basaltic magma formation
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High viscosity, high gas, 66% or higher silica content
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Rhyolitic magma compostion
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Extremely explosive eruptions with lots of ash
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Rhyolitic magma eruption
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Mix with silica/water rich continemtal crust
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Rhyolitic magma formation
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Medium gas levels, 52%-66% silica content
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Andesitic magma compostion
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Explosive to intermediate eruptions
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Andesitic magma eruption
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Forms from ocean crust melting
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Andesitic magma formation
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Hot molten rock that is magma once outside of the volcano; cools to form igneous rock
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Lava
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Found inside the volcano, in the asthenosphere, crust/lithosphere; Hot molten rock plastic or gummy look
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Magma
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Forms pumice, obsedion, basalt, scoria; outside of volcano
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Extrusive igneous rock
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Forms granite, gabbro, andesite; inside of the volcano
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Intrusive igneous rock
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