Discuss the activities at plate margins
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The surface of the earth is divided into seven major and eight minor plates. Each plate is in motion relative to its neighbours, resulting in geological activity at the plate boundaries. ... There are three types of plate boundaries: divergent, convergent and conservative.
Most of these plate margins are under the oceans. As the plates move apart magma rises from the mantle to the earth's surface. the rising magma forms shiled volcanoes. Constructive (tensional) plate margins occur where plates move apart.
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