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9 Cards in this Set
- Front
- Back
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what 3 factors determine the type of volcanic eruption?
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magma composition, magma temperature, amount of dissolved magma
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what lava type is more viscous?
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rhyolitic
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what type of lava is least viscous?
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basaltic
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2 most commen gases errupted from volcano
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water vapor and carbon dioxide
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what produces quiet eruptions?
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fluid basaltic magma
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what produces explosive eruptions?
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highly viscous magma
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what are 2 types of basaltic magma?
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pahoehie- flows and resembles braids in rope
aa- rough surface, dangerous sharp edges |
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list various type of pyroclastic material in order
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ash (2mm), lapilli (2-64mm), blocks and then bombs (greater than 64mm)
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what determins type of volcano formed?
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composition of magma
a) fluid lavas produce broad structures b) sillica rich lava produce cones with steep slopes |
