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Plate Tectonics
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Published on Nov 24, 2015
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PRESENTATION OUTLINE
1.
Plate tectonics is the theory that the crust is split into pieces that float on the mantle.
2.
CONVECTION CURRENTS
CURRENTS CAUSED BY DIFFERENT DENSITIES IN THE MANTLE
3.
SLAB PULL
THE PULL OF GRAVITY ON A SUBDUCTED PLATE
4.
RIDGE PUSH
NEW LESS DENCE CRUST AT A DIVERGENT BOUNDRY PUSHES OLD CRUST AWAY AT Y
5.
DIVERGENT PLATE BOUNDRY
OCCURS WHEN TWO PLATES PULL AWAY FROM EACHOTHER OR DIVERGE
6.
RIFT VALLEY
A divergent boundry on land creats a
A large rift valley in africa is lake rukwa.
Photo by
Ben Andreas Harding
7.
MID OCEAN RIDGE
Divergent plates under water creates a mid ocean ridge.
Mid ocean ridges are underwater land forms that creat new crust at divergent plates
Photo by
wockerjabby
8.
CONVERGENT PLATE BOUNDRIES
Anna Disanto
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