Discussion Post
Since its emergence in the 1960's, plate tectonic theory has gained wide-spread acceptance as the model of how Earth's land masses shift over time. Plate tectonics developed historically in 1915 when Alfred Wegener proposed his theory of "continental drift." He stated that the continents plowed through crust of ocean basins, which would explain why the outlines of many coastlines, such as South America and Africa, appeared to fit like missing pieces of a jigsaw puzzle.
There are various types of plate boundaries such as: convergent plate boundaries, when two collide; divergent plate boundaries, when they spread apart; and transform boundaries, when they slide past each other.
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