convergent plate boundary
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A tectonic boundary where two plates are moving toward each other. If the two plates are of equal density, they usually push up against each other, forming a mountain chain. If they are of unequal density, one plate usually sinks beneath the other in a subduction zone. The western coast of South America and the Himalayan Mountains are convergent plate boundaries.
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Also called active margin collision zone
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See more at tectonic boundary Compare divergent plate boundary
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