Download The Effects of Plate Boundaries

There are 3 Types of Plate
Boundaries
 Divergent
 Convergent:
 Ocean-Ocean
 Ocean-Continent
 Continent-Continent
 Transform
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
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
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
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.
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.
Hot Spots vs. Convergent Boundaries
 Both hot spots and oceanocean 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.
Transform Plate Boundaries
 Occur when two
plates slide past
each other.
 Create Strike-slip
faults, can create
hills, but not
mountains.
 San Andreas Fault