divergent plate boundary

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Related to divergent plate boundary: Convergent Plate Boundary

di·ver·gent plate boundary

A tectonic boundary where two plates are moving away from each other and new crust is forming from magma that rises to the Earth's surface between the two plates. Also called spreading zone. See more at tectonic boundary. Compare convergent plate boundary.
References in periodicals archive ?
The Rift is an example of a divergent plate boundary, where the Earth's tectonic forces are pulling plates apart and creating new continental crust.
There is a divergent plate boundary, where a rift has formed between Africa and the Arabian tectonic plates, which began to part about 30 million years ago.