1. The Effects of Plate Boundaries

2. There are 3 Types of Plate Boundaries
Divergent
Convergent:
Ocean-Ocean
Ocean-Continent
Continent-Continent
Transform

3. Divergent Plate Boundaries
Divergent plates cause SEA FLOOR SPREADING.
Over geologic time, divergent faults cause continents to move away from one another.
Start off as Rift Valleys, eventually become Mid-Ocean Rifts

4. Convergent Boundaries
Convergent boundaries occur when two plates collide.
The lighter plate always goes over the heavier plate.
The heavier plate is SUBDUCTED
Create VOLCANOES (on land and in sea), and MOUNTAIN RANGES.
THERE ARE 3 TYPES OF CONVERGENT PLATES BOUNDARIES

5. Ocean-Continent Plate Boundaries
Occur when an oceanic and continental plate meet.
The ocean plate is heavier and slides under the continent.
Often results in volcanoes on land and mountain ranges

6. Continent-Continent Plate Boundaries
Occur when continental plates meet.
Both are heavy and neither can be pushed down into the Earth.
Can either smush together, or one can go on top of the other, resulting in very tall mountains.
Eventually, they come to a stop. Himalayan Mtns.

7. Ocean-Ocean Plate Boundaries
Occur when two oceanic plates meet. They are both heavy, and one sea floor slides over another.
A trench is formed, and often chains of islands result.

8. Hot Spots vs. Convergent Boundaries
Both hot spots and ocean- ocean convergent boundaries can create chains of islands.
However, convergent boundaries create islands when one plate is subducted another.
Hot spots are bubbles of magma that create islands as a plate moves above it.

9. Transform Plate Boundaries
Occur when two plates slide past each other.
Create Strike-slip faults, can create hills, but not mountains.
San Andreas Fault