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The lava is silica-rich, so it clogs in the vents. The pressure builds, and boom.

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Q: What causes volcanic eruptions for composite volcanoes?
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What type of plate boundary causes volcanic eruptions?

There are two plate boundaries that cause volcanoes. They are the divergent and convergent plate boundaries.


How do volcanoes affect Hawaii?

Hawai'i was formed from volcanoes. The shape of the islands (volcanic mountains) affects the weather. Volcanic activity causes eartquakes, eruptions on the Big Island cause it to continue to grow, cause fires, close roads. Gasses from the volcanoes can cause vog (volcanic smog) and volcanoes have produced fertile soil in Hawai'i.


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There are several causes of volcanic eruptions. Some of the most common are the buoyancy of the magma, pressure form the gases in the magma, and a new batch of magma entering an already filled chamber.


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high viscosity in magma composition.


What causes events such such as earthquakes volcanic eruptions and the creation of mountains?

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