pangea and tectonic boundaries also spelled pangaea!
TRANSCRIPT
Pangea andTectonic 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:
• Continental Drift Theory
• Similar fossils on different continents
• Rocks of same age on different continents
• Evidence of a Mid-Ocean Ridge
Convergent Divergent Transform
O – OOceanic –
Oceanic
O – OOceanic –
Oceanic
Slide Past Each Other
C – OContinental –
Oceanic
C – CContinental –
Continental
C – CContinental –
Continental
O – OOceanic – Oceanic
(Convergent)
One Oceanic plate is subducted
under the other - volcanoes can form and become islands
Convergent boundary of two oceanic plates.
Creates an ________ and a _____. Example: _____island arc trench Japan
C – OContinental – 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 _______ mountain range and a ______. Examples: _______ or _______ Mts
volcanictrench Cascades Andes
C – CContinental – Continental
(Convergent)
Collide, buckle, and thicken Creating mountains
India into Asia = Himalayas
Convergent boundary of two continental plates. Forms a ______ mountain range. Examples: ___________, Alps, ______________
folded HimalayasAppalachians
O – OOceanic –Oceanic
(Divergent)
Two plates move apart, magma seeps up, fills gap and hardens
Example = Mid – Ocean Ridge
Oceanic – OceanicDivergent Boundary
The force responsible for plate movement is __________.
C – CContinental – Continental
(Divergent)
Two continental plates move apart.
Magma fills in gaps and hardens.
Creates a Rift Valley.
Divergent boundary of two continental plates.
Creates a __________. Example: _____________rift valley East African Rift
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 ____ each other.
Example: ________________ in California
past
San Andreas Fault