Types of plate boundaries 0.0 / 5 ? GeographyRestless EarthGCSEEdexcel Created by: Sue.KandiCreated on: 20-05-17 14:12 Destructive plate boundaries A destructive plate boundary is sometimes called a convergent or tensional plate margin. This occurs when oceanic and continental plates move together. The oceanic plate is forced under the lighter continental plate. Friction causes melting of the oceanic plate and may trigger earthquakes. Magma rises up through cracks and erupts onto the surface. 1 of 4 Constructive plate boundaries A constructive plate boundary, sometimes called a divergent plate margin, occurs when plates move apart. Volcanoes are formed as magma wells up to fill the gap, and eventually new crust is formed. This pulls the crust apart and creates fissures and faults which molten magma can reach the surface. Can form islands. E.g. mid-Atlantic Ridge. 2 of 4 Collision plate boundaries Collision zones form when two continental plates move towards each other. Neither plate is forced under the other, so both are forced up and form fold mountains. E.g. Indo-Australian Plate & Eurasian Plate. The buckling has led to the formation of the world's biggest mountain range, the Himalayanchain & the Tibetan plateau to the north of it. 3 of 4 Conservative plate boundaries A conservative plate boundary is sometimes called a transform plate margins. Occurs where plates slide past each other in opposite directions/ in the same direction but at different speeds. Friction is eventually overcome and the plates slip past in a sudden movement. The shockwaves created produce an earthquake. E.g San Andreas Fault in California. 4 of 4
The Restless Earth-What landforms are found at different plate boundaries? (1.2) 3.5 / 5 based on 2 ratings
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