Main vent - not much explosive gas, layers of same rock type - basalt, most recent eruption - frequent/low viscocity flows, gentle sloping sides, magma chamber, lava has low viscosity - travels quickly , caldera - water/lava lake, very large landforms, less dangerous unless covered in snow/mud, Divergent boundaries .

Shield Volcanoes: Manu Lau - 75 miles long

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