Science - Plate Tectonics

O-O examples

Mariana Island Arc / Trench, Aluetian Island Arc, Indonesia

O-C examples

Andes Mtns, Cascade Mtns, Central American Volcanic Arc

C-C examples

Himalayan Mtns, Zargros Mtns ( Iran), Appalachin MtnsO

O-O features

volcanic island arc, ocean trench, earthquakes

O-C features

volcanic arc, ocean trench, earthquakes

C-C

mountain ranges, high plateaus, earthquakes

Convergent Boundries : Volcanic Activiy?

Yes!

Convergent Boundry Process

Oceanic subducted. -subduction = oceanic crust destroyedContinental crust is forced upward, forming mountains and leading to volcanic activity.

Divergent Boundry Process

Seafloor spreading = oceanic crust created as tectonic plates move apart, magma rises to form new crust.

Divergent Boundry Features

Mid-ocean ridges, rift valleys, earthquakes

Divergent Boundry: Volcanic Activity?

Yes!

Divergent Examples:

Mid- Atlantic Ridge, East African Rift, East Pacific Rise

Transform Boundry Process

Crust is neither created or destroyed, but broken

Transform Boundry Features

Earthquakes (only!)

Transform Boundry Examples

San Andreas Fault, Alpine Fault (New Zealand), A long the Mid- Atlanic Ridge