Download Pangea and Continental Boundaries

Pangea and
Tectonic Boundaries
Also spelled Pangaea!
Pangea
• Alfred Wegener was the first to explain
the break up of Pangea.
• Pangea in Greek means “All-Land”
Proof that Pangea was broken apart:
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Continental Drift Theory
Similar fossils on different continents
Rocks of same age on different continents
Evidence of a Mid-Ocean Ridge
Convergent
Divergent
O–O
O–O
Oceanic –
Oceanic
Slide Past
Each
Oceanic –
Other
Oceanic
C–O
C–C
Continental –
Oceanic
Continental –
Continental
C–C
Continental –
Continental
Transform
O–O
Oceanic – Oceanic
(Convergent)
One Oceanic plate is subducted
under the other - volcanoes can form and
become islands
Convergent boundary of two oceanic plates.
island arc and a _____.
trench Example: _____
Japan
Creates an ________
C–O
Continental – Oceanic
(Convergent)
Oceanic Crust is subducted under
Continental crust volcanoes can form on
continental side
Example = Andes Mountains in
South America
Convergent boundary of an oceanic plate and a
continental plate. Forms a _______
volcanic mountain range
trench Examples: Cascades
Andes Mts
and a ______.
_______ or _______
C–C
Continental – Continental
(Convergent)
Collide, buckle, and thicken Creating
mountains
India into Asia = Himalayas
Convergent boundary of two continental plates. Forms
Himalayas
a ______
folded mountain range. Examples: ___________,
Appalachians
Alps, ______________
O–O
Oceanic –Oceanic
(Divergent)
Two plates move apart, magma seeps up,
fills gap and hardens
Example = Mid – Ocean Ridge
Oceanic – Oceanic
Divergent Boundary
The force responsible for plate movement is __________.
C–C
Continental – Continental
(Divergent)
Two continental plates move apart.
Magma fills in gaps and hardens.
Creates a Rift Valley.
Divergent boundary of two continental plates.
rift valley
East African Rift
Creates a __________.
Example: _____________
Transform
Can be between C – C or O – O or C - O
Tectonic plates slide past each other
causing earthquakes
Example = San Andreas Fault
Transform-fault boundary where the North American
and Pacific plates are moving ____
past each other.
San Andreas Fault in California
Example: ________________