Plate Tectonics
Published on Nov 24, 2015
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PRESENTATION OUTLINE
Plate tectonics is the theory that the crust is split into pieces that float on the mantle.
CONVECTION CURRENTS
CURRENTS CAUSED BY DIFFERENT DENSITIES IN THE MANTLE
SLAB PULL
THE PULL OF GRAVITY ON A SUBDUCTED PLATE
RIDGE PUSH
NEW LESS DENCE CRUST AT A DIVERGENT BOUNDRY PUSHES OLD CRUST AWAY AT Y
DIVERGENT PLATE BOUNDRY
OCCURS WHEN TWO PLATES PULL AWAY FROM EACHOTHER OR DIVERGE
RIFT VALLEY
- A divergent boundry on land creats a
- A large rift valley in africa is lake rukwa.
Photo by Ben Andreas Harding
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
