Plate Boundaries.

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Presentation transcript:

Plate Boundaries

Constructive (Divergent)

Geological Process Associated Landforms Example Plate Movements Geological Process Associated Landforms Example Two plates of the oceanic crust moving apart from each other Two plates of continental crust moving apart from each other Upwelling of magma Creation of new lithosphere Forms volcanoes Mid-oceanic ridge formation Earthquakes Causes sea-floor spreading The America’s moving away from the Eurasian and African Plates formed the Mid- Atlantic Ridge Formed East –African Rift Valley http://teachertube.com/viewVideo.php?video_id=147431

Destructive (Convergent)

Plate Movements Geological Processes Associated Landforms Examples Two Plates moving towards each other (oceanic crust towards continental crust) converging results in the seduction of oceanic plate 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! Andes Mountains- Nazca plate sinking underneath South American plate creating the Andes Mountains http://teachertube.com/viewVideo.php?video_id=78053&title=Convergent_Boundary

Collision Plate Margins

Plate Movements Geological Processes Associated Landforms Examples Two plates moving towards each other (continental crust toward continental crust) 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)

LAND IS NEITHER CREATED OR DESTROYED 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=tIuk2blBzHs

Plate boundary rap http://www.youtube.com/watch?v=dkELENdZukI http://www.youtube.com/watch?v=wW23Z94yf24