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    Forbidden Knowledge TV
    Alexandra Bruce
    September 7, 2010

    Most volcanoes occur near the in-transit edges of tectonic plates, in what’s called the subduction zone.

    Some volcanoes are created when plates collide. An ocean plate basin, for example, can dive beneath a land plate, which usually consumes the ocean plate. This can drive magma to the surface, causing pressure to build and volcanic eruption.

    This is how Mount St. Helens went off.

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