Types+Of+Plate+Boundaries

Plate Boundaries  There are three types of plate boundaries. In these boundaries, volcanoes and earthquakes happen when they move. The three types are divergent, convergent, and transform boundaries. Divergent Boundaries  Divergent boundaries are plates that move away from each other. They form mid-ocean ridges, where magma rises up from the asthenosphere, and cools to form new lithosphere. In the middle of the mid-ocean ridge, is the rift valley, which is the valley that forms where plates separate. Most divergent boundaries are located in the ocean. Divergent boundaries are known for the earthquakes they make when they move. Convergent Boundaries  Convergent boundaries are plates that collide with each other. Something they all have in common is that they make earthquakes. Three types of collisions can happen. One of the collisions is when oceanic lithosphere and continental lithosphere collide, and oceanic lithosphere goes below the continental lithosphere because it is denser that the continental plate. The energy that the oceanic lithosphere will be released and it will cause earthquakes, and it also causes volcanoes because the oceanic lithosphere will melt and the magma will rise. Second collision is when two continental lithospheres collide with each other, and since none of the two are denser than each other, it makes mountains. The third collision is when two oceanic lithospheres collide with each other, one plate subducts under another plate, making a deep-ocean trench. Also, the lithosphere will melt and create magma, making island arcs. Transform Boundaries  Transform boundaries are two plates that slide past each other. They happen near convergent and divergent boundaries. They cause earthquakes because they do not slide past each other nicely. However, they do not make magma. Transform boundaries separates mid-ocean ridges when they happen in the ocean, segments of the ridges are connected by fracture zones.

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