Divergent boundaries 2 plates move apart Most occur at the mid ocean ridge where sea-floor spreading occurs Forms oceanic crust = Basalt When form on land = rift valley
Divergent boundaries 2 plates move apart Most occur at the mid ocean ridge where sea-floor spreading occurs Forms oceanic crust = Basalt Sea-Floor Spreading Creates oceanic crust and causes the plates to move.
Divergent boundaries 2 plates move apart Most occur at the mid ocean ridge where sea-floor spreading occurs Forms oceanic crust = Basalt When form on land = rift valley
Rift Valley
Great Rift Valley in Africa
Great Rift Valley in Africa
Convergent boundaries 2 plates come together Oceanic crust = more dense Continental crust = less dense Collisions Oceanic to continental = subducting oceanic plate
Convergent boundaries Continental to continental = mountain building
Convergent boundaries Continental to continental = mountain building Continental Crust = Granite