PRESENTATION OUTLINE
Plate Tectonics:
Pieces of the lithosphere are in slow constant motion.
Cause of plate movement 1:
Convection currents:
The flow that transfers heat through a fluid.
Cause of plate movement 2:
Slab pull
The pull of gravity on a plate that is being subducted.
Cause of plate movement 3:
Ridge push
New crust pushes older denser crust out of the way as older, denser crust gets pulled away by gravity
Divergent plate boundary:
Two tectonic plates moving away from each other.
Resulting landform from divergent plate boundary (land)
Great Rift Valley in East Africa
Resulting landform from divergent plate boundary.
The mid Atlantic ridge
(Sea)
Convergent plate boundary :
Where two or more tectonic plates of the lithosphere move toward each other and collide.
Resulting landform from ocean vs. continent
Deep sea trench with
Andes mountains
Resulting landform from
ocean vs. ocean
Mariana Trench
Resulting landform from
continent vs. continent
Mountain building
Mount Everest
Subduction zone:
The place where two lithospheric plates come together one over another.
Deep ocean trench:
Oceanic crust is formed at an oceanic ridge while the lithosphere is subducted back to the asthenosphere at trenches.
Deep ocean trench example:
Japan Trench
Transform plate boundary:
Neither create or destroy the lithosphere.
Resulting event from a transform boundary:
Earthquake
Example of a transform plate boundary:
San Andreas fault
