A simple presentation of Plate Boundaries.

1. Types of Plate Boundaries

2. Divergent Boundaries
 Divergent Boundaries are the boundaries
between two plates that are diverging, or
moving away from each other.

3. What Forms at Divergent Plate
Boundaries?
 Ridges: Mountain chain that forms along the floor of the
ocean. (E.g. Mid-Atlantic Ridge)
 Volcanoes: an opening in the Earth's crust through which
molten lava, ash, and gases are ejected.

4. Iceland has a divergent plate boundary
running through its middle

5. Convergent Boundaries
 Convergent Boundaries are the boundaries
between two plates that are converging, or
moving towards each other.
 There are three types of convergent
boundaries:
1. An ocean floor plate collides with a less dense
continental plate.
2. An ocean floor plate collides with another
ocean floor plate.
3. A continental plate collides with another
continental plate.

6. What Forms at Convergent Plate
Boundaries?
 Mountain Ranges: when two continental plates collide
pushing the continental crust up to form mountains.
 Subduction Zones: The region where oceanic plates sink
down into the asthenosphere.
 Volcanoes: an opening in the Earth's crust through which
molten lava, ash, and gases are ejected.

7. Oceanic-Continental
E.g. The Andes
Oceanic-Oceanic 
E.g. The Mariana Trench is 11 km deep!
Continental-Continental
 Eg European Alps, Himalayas

8. Transform Fault Boundaries
 Transform Boundaries are the boundaries
between two plates that are sliding
horizontally past one another.

9. What Forms at Transform Plate
Boundaries?
 Fault Lines: a line on Earth's surface that occurs where there
is a break in the crust

10. View of the San Andreas transform fault

11. Effects of Plate Tectonics
 Landforms caused by plate tectonics:
a. rift valleys (divergent boundaries)
b. mountain ranges (continental-continental
convergent boundaries)
c. volcanoes (oceanic-continental
convergent boundaries)
d. faults (transform boundaries)