Transcript Transform Boundary

Objective 10/5/11
Describe the three types of tectonic plate boundaries.
Intro
What do you think forms when two tectonic plates collide?
What about when they divide?
Plate Boundaries
Plate Boundaries
• 3 Types of
Boundaries
• Divergent boundary
– Plates separate
– 2 types
• Transform boundary
– Plates slide past each
other
– 1 type
• Convergent boundary
– Plates collide
– 3 types
BEGIN FOLDABLE
Plate Boundaries
• ContinentalContinental
divergence
• Small volcanoes and
earthquakes
• Example: African Rift
Valley
• Rift valley
• Deep valley that
forms when 2
continental crusts
move apart
DRAW
Divergent Boundary
• Oceanic-Oceanic
divergence
• Mid-ocean ridge
• Small volcanoes and
earthquakes
• Example: Mid-Atlantic
Ridge
• Underwater mountain
chain’s and valley’s
created by sea-floor
spreading
DRAW
Plate Boundaries
• Transform
Boundary
• Plates slide past each
other
• Many earthquakes
occur here
• Example: San
Andreas Fault in CA
DRAW
Convergent Boundary
• Oceanic-Oceanic
collision
• Creates huge volcanoes
and earthquakes
• Example: Philippine
islands
• Subduction
• Process of denser crust
sinking down into mantle
• Valley/canyon created at
subduction zone
• Deep-ocean trench
DRAW
Oceanic – Oceanic Collisions
• Continental-Oceanic
Collision
• Subduction of ocean
plate
• Powerful volcanoes
and earthquakes
• Forms mountains
• Example: Andes
mountains in Chile
DRAW
Continental – Oceanic
Collisions
• ContinentalContinental
collision
• Creates HUGE
mountains
• Both crusts move upward
since neither are dense
enough to sink into
mantle
• Example: Himalayan
Mtns. in India
DRAW
Continental – Continental
collisions
• (Tectonic Plates Video - F4)
Plate Boundaries
• Summary: Plates can collide into each
other, separate and slide past each other
creating the three types of plate
boundaries: Divergent, Convergent and
Transform. These boundaries create
many different types of landforms on
Earth.
Objective 10/3/11
Explain that the earth's lithosphere is composed of many plates
rather than one continuous piece
Outro
What do you think makes these plates move into each
other?