Materials Associated with Volcanic Eruptions:

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4 Terms

1
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What types of lava flows are there?

Basaltic lavas (low viscosity), andesitic lavas (medium viscosity), rhyolitic lavas (high viscosity).

2
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What is a common characteristic of basaltic lavas?

They form pahoehoe and aa flows and have low viscosity.

3
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What are pyroclastic?

Fire fragments such as ash, glass, pumice, lapilli, cinders, blocks, and bombs.

4
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What is the role of gases in volcanic eruptions?

Gases make up 1-5% of magma by weight, and contribute to eruption explosivity.