convergent plate boundary
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con·ver·gent plate boundary(kən-vûr′jənt)
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 to form a mountain chain. If they are of unequal density, one plate usually sinks (subducts) beneath the other. Also called collision zone. See more at tectonic boundary. Compare divergent plate boundary.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.