Plate Tectonics
Published on Nov 18, 2015
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PRESENTATION OUTLINE
PLATE TECTONICS
A THEORY OF EARTHS LITHOSPHERE DRIVED BY CURRENTS IN THE MANTLE.
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CONVECTION CURRENT
THE TRANSFER OF HEAT IN A FLUID
SLAB PULL
GRAVITY PULLING DOWN A SLAB DURING SUBDUCTION
RIDGE PUSH
- New less dense crust forming at divergent plate boundaries
- As the old crust gets pushed out of the way.
DIVERGENT PLATE BOUNDARY
PLATES MOVING AWAY FROM EACH OTHER
RIFT VALLEY
A AREA OF LAND THAT HAS FAULT LINES AND ROCK DISPLACEMENTS
MID-OCEAN RIDGE
LAVA COMES UP AND COOLS FORMING LAND
DIVERGENT LAND BOUNDARY LAND EXAMPLE
LAND THAT FORMS FROM DIVERGENT PLATE BOUNDARIES
DIVERGENT PLATE BOUNDARY AT SEA EXAMPLE
- Mid-ocean ridge:
- Underwater land forms that is caused by a divergent plate boundary
- Mariana's trench (Mariana island and Japan trench)
CONVERGENT PLATE BOUNDARY
WHEN TWO OCEAN PLATES COLLIDE
RESULTING LANDFORM OCEAN VS. CONTINENT
- Chile Peru deep sea trench with Andes Mountains-
- (Trench with a volcanic Arc)
- Subduction-
- Movement of a plate into earths crust beneath another plate
RESULTING LANDFORM FROM OCEAN VS. OCEAN
- Mariana's Trench
- (located in Mariana's island and Japan Trench)
- Definition- During subduction crust is being destroyed.
SUBDUCTION ZONE
A COLLISION OF TWO PLATES.
DEEP OCEAN TRENCH
LITHOSPHERE SUBDUCTS INTO THE ASTHOSPHERE IS THE DEEP OCEAN TRENCH
TRANSFORM PLATE BOUNDARY
THEY DONT CREATE OR DESTORY THE LITHOSPHERE.
RESULTING EVENT OF TRANSFORM BOUNDARY
NOTHING OCCURS THEY DON'T CREATE OR DESTORY LAND.
EXAMPLE OF A TRANSFORM PLATE BOUNDARY
SAN ANDREAS FAULT
