GARY HINCKS / SCIENCE PHOTO LIBRARY GARY HINCKS / SCIENCE PHOTO LIBRARY
Shield volcano erupting. Cutaway computer artwork showing the internal structure of a shield volcano during an eruption. During an eruption magma (orange) forces its way through the Earth's crust (beige and purple) through a conduit (pipe, centre), and erupts as a mixture of lava and ash. The largest volcanic eruptions can propel ash into the stratosphere (11 kilometres high).
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