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Unformatted text preview: • magma chambers below the surface are sites of temporary lava storage • magma chambers can be several kilometers below volcanoes *cascadia subduction and the cascades • x-section across cascadia subduction zone ← *distribution of seismicity under MSH-past decade ← *making bubbles in magmas • decompression of magma during ascent through magma conduits • crystallization of magma in a chamber ← *decompression of magma in conduits • magma chambers become periodically replenishes by intrusion of new magma • the new magma forces magma rise up the conduit where it becomes saturated in water and bubbles form, causing a violent eruption 17/04/2008 15:34:00 ← 17/04/2008 15:34:00 ←...
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This note was uploaded on 05/06/2008 for the course GEO 1400 taught by Professor Peternabelek during the Winter '08 term at Missouri (Mizzou).
- Winter '08