Plate Tectonics
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PRESENTATION OUTLINE
PLATE TECTONICS
THE THEORY THAT EARTH'S OUTER SHELL IS DIVIDED INTO SEVERAL PLATES
CONVECTION CURRENTS
a current in a fluid that results from convection.
SLAB PULL
THE PORTION OF MOTION OF A TECTONIC PLATE THAT CAN BE ACCOUNTED FOR BY ITS SUBDUCTION
RIDGE PUSH
RIDGE PUSH OR SLIDING PLATE FORCE IS A PROPOSED MECHANISM FOR PLATE MOTION IN PLATE TECTONICS.
DIVERGENT PLATE BOUNDARIES
TWO PLATES ARE MOVING AWAY FROM EACH OTHER AND NEW CRUST IS FORMING FROM MAGMA
On land divergent plate boundaries form Rift Valley
In the ocean divergent plate boundaries form mid ocean ridge
CONVECTION PLATE BOUNDARY
THE TRANSFER OF HEAT BY THE CIRCULATION OR MOVEMENT OF THE HEATED PARTS OF A LIQUID OR GAS.
When ocean and continental crust converge they form volcanic arc like MT Hood
When ocean and ocean crust converge they form volcanic island arc like Aleutians island.
When continental crust converges
with continental crust converge
It forms mountains like Mt Everest
Subduction zone
The process that takes place at convergent boundaries by which one tectonic plate moves under another tectonic plate and sinks into the mantle.
Deep ocean trench
The oceanic trenches are hemispheric-scale long but narrow topographic depressions of the sea floor.
Transform plate boundary
is predominantly horizontal in either sinistral or dextral direction.
When plates move along transform boundaries, it causes earthquakes
An example of a transform boundary is San Andreas in California
BY
CARRIE PIZZO
