PLATE TECTONICS

CONVECTION CURRENTS

SLAB PULL

• Slab pull happens at subduction zones where on plate is pulled down into the mantle.

RIDGE PUSH

• Pushes tectonic plates apart or up to form new crust.

DIVERGENT PLATE BOUNDARY

• linear feature that exists between two tectonic plates that are moving away from each other.

DIVERGENT PLATE BOUNDARY

• On land divergent plate boundaries form rift valleys

DIVERGENT PLATE BOUNDARY

• In the ocean, divergent plate boundaries form mid ocean ridges.

CONVERGENT PLATE BOUNDARY

• Where two (or more) tectonic plates or fragments of the lithosphere move toward one another and collide.

CONVERGENT PLATE BOUNDARY

• When ocean and continental crust converge they form a volcanic arc like Mount St. Helens

CONVERGENT PLATE BOUNDARY

• When ocean and ocean crust converge they form an island arc like Japan

CONVERGENT PLATE BOUNDARY

• When continental crust converges with continental crust they form mountains like the Himalayas

SUBDUCTION ZONE

• Where two lithospheric plates come together

DEEP OCEAN TRENCH

• A deep valley along the floor of the ocean where crust sinks back into the mantle like the Puerto Rico trench

TRANSFORM PLATE BOUNDARY

• a type of fault whose relative motion is sliding past each other

TRANSFORM PLATE BOUNDARY

• When plates move along transform boundaries, it causes faults

TRANSFORM PLATE BOUNDARY

• An example of a transform boundary is the San Andreas fault in California