Plate tectonics are like earthquakes and earthquakes move the Earth
and shape it. Examples of how plate tectonics change the surface of the
* Divergent boundaries - areas where plates move away from each other, forming either mid-oceanic ridges or rift valleys.
* Convergent boundaries - areas of where plates move toward each other
and collide. These are also known as compressional or destructive
* Subduction zones - These occur where an oceanic plate meets a
continental plate and is pushed underneath it. Subduction zones are
marked by oceanic trenches. The descending end of the oceanic plate
melts and creates pressure in the mantle, causing volcanoes to form.
* Obduction - This occurs when the continental plate is pushed under the
oceanic plate, but this is unusual as the relative densities of the
tectonic plates favours subduction of the oceanic plate. This causes the
oceanic plate to buckle and usually results in a new mid ocean ridge
forming and turning the obduction into subduction
* Orogenic belts - They occur where two continental plates collide and push upwards to form large mountain ranges.
* Transform boundaries - They occur when two plates grind past each other with only limited convergent or divergent activity.
That is why plate tectonics are the same thing as continental drift. Does this help you?
Dec 18th, 2014
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