Three Types of Plate Boundaries Divergent Convergent Transform or strike/slip

Plates interact where they meet.

Divergent boundaries— Plates move apart Example a spreading center--Mid-Atlantic Ridge The Mid-Atlantic Ridge goes through Iceland.

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Or the Great Rift Valley in Africa

Convergent boundaries --plates move together

Three types of Convergent Plate Boundaries oceanic –oceanic oceanic-continental continental-continental

Oceanic-oceanic results in subduction of one plate results in island arc volcanoes

Ocean-continental results in subduction of the oceanic plate

Ocean-continental Volcanoes form when the oceanic plate reaches the lithosphere and begins to melt The less dense molten material rises and forms a volcano Because it is a mixture of basaltic oceanic crust and granitic continental crust, the lava is Andesitic Like the Andes Mountains

continental-continental

Continental-continental results in enormous mountains like the Himalayas.

Transform-fault boundaries--plates slide horizontally Example--Pacific plate and the North American plate slide past each other at the San Andreas fault.

most of the Pacific ocean? What plate makes up most of the Pacific ocean?