Unformatted text preview: up to 9% of magma may be gas Magma release – magma rises via a conduit to the surface. Craters – a bowl shaped depression atop a volcano. Craters are up to 500 m across; 200 m deep. Caldera – a gigantic volcanic depr4ession Form from massive eruptions...
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- Fall '10
- Volcanology, Volcano, volcanic gas, bowl shaped depression, gigantic volcanic depr4ession, gas Magma release