What type of boundary forms when two plates pull apart?


Quick Answer

When two tectonic plates pull apart from one another, they form a divergent plate boundary. In addition to divergent boundaries, there are two other common types of boundaries: convergent boundaries and transform boundaries, also known as strike-slip boundaries.

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Full Answer

The majority of divergent boundaries occur on the ocean floor and lead to the creation of new crust. When two plates pull apart, liquid magma seeps out of the crack between the plates. The magma is then supercooled by the water and hardens to form new rock. This process builds the mid-ocean ridges, areas where new rock causes the land on either side of the boundary to grow higher than the surrounding crust.

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