Plate Boundaries

Construcive (Divergent)

Plate Movements

• • Two plates of the oceanic crust moving apart from each other Two plates of continental crust moving apart from each other • • • • • •

Geological Process Associated Landforms

Upwelling of magma Creation of new lithosphere Forms volcanoes Mid-oceanic ridge formation Earthquakes Causes sea-floor spreading

Example

• • The America’s moving away from the Eurasian and African Plates formed the Mid- Atlantic Ridge Formed East –African Rift Valley http://teachertu be.com/viewVid eo.php?video_id

=147431

Destructive (Convergent)

•

Plate Movements

Two Plates moving towards each other (oceanic crust towards continental crust) converging results in the seduction of oceanic plate

Geological Processes Associated Landforms

• • • Convergent Seduction-creates oceanic trench Creation and upwelling of magma.

• • Volcanoes form Mountain building (either folded or Island Arc) • Deep –sea trench formation • Earthquakes LAND IS DESTROYED!

Examples

Andes Mountains Nazca plate sinking underneath South American plate creating the Andes Mountains http://teachertube.com/view Video.php?video_id=78053&t itle=Convergent_Boundary

Collision Plate Margins

Plate Movements

• Two plates moving towards each other (continental crust toward continental crust)

Geological Processes Associated Landforms Examples

• • • • • • Convergent Collision Results in oogenesis (mountain) building.

Folded mountains formed No volcanoes form here due to no magma Earthquakes (deep and shallow) Himalayas Indian plate moving into Eurasian plate forms the Himalayas

Conservative Plate Margins (Transform)

Plate Movements Geological Processes Associated Landforms Examples

• Two plates moving parallel to each other/ moving sideways past each other.

• • • Horizontal movement Stick-slip process Earthquakes (shallow) LAND IS NEITHER CREATED OR DESTROYED San Andres Fault -N American plate moving SEast and Pacific plate move Nwest.

http://www.youtube.

com/watch?v=tIuk2bl BzHs

Plate boundary rap

• • http://www.youtube.com/watch?v=dkELENdZ ukI http://www.youtube.com/watch?v=wW23Z94 yf24