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