Divergent Plate Movement: Seafloor Spreading-Seafloor spreding is the movement of two oceanic plates away from each other (at a divergent plate boundary), which results in the formation of a new oceanic crust (from magma that comes from within the Earth's mantle) along a mid-ocean ridge.
When two plates collide (at a convergent plate boundary), some crust is destroyed in the impact and the plates become smaller. The results differ, depending upon what types of plates are involved.
Oceanic Plate and Continental Plate - When a thin, dense oceanic plate collides with a relatively light, thick continental plate, the oceanic plate is forced under the continental plate; this phenomenon is called subduction.
Two Oceanic Plates - When two oceanic plates collide, one may be pushed under the other and magma from the mantle rises, forming volcanoes in the vicinity.
Oceanic Plate and Continental Plate - When a thin, dense oceanic plate collides with a relatively light, thick continental plate, the oceanic plate is forced under the continental plate; this phenomenon is called subduction.
Two Oceanic Plates - When two oceanic plates collide, one may be pushed under the other and magma from the mantle rises, forming volcanoes in the vicinity.
Two Continental Plates - When two continental plates collide, mountain ranges are created as the colliding crust is compressed and pushed upwards.
Volcanoes form when a plate is pushed under another plate, this is called a subduction.
Earthquakes happen when the plates pass each other and hit each other at the same time (transform boundaries)
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