Constructive: Divergent , Shield volcanoes, Frequent, gentle eruptions, Low viscosity / runny lava, Wide, gentle profile, Plates moving apart, Produces new crust, Basaltic lava - less gassy, Destructive : Convergent, Composite cone volcanoes, Infrequent, violent eruptions, High viscosity / 'sticky lava', Steep profile / cone shaped, Andesitic lava - high gas content so explosive, Made of layers of lava and pyroclastic material (dust/ash), Plates moving towards one another, One tectonic plate is subducted & melts,

Plate Boundaries CTL

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