What are three types of motion that occur at plate boundaries?

The interaction areas between tectonic plates are called boundaries. There are three types of boundaries:

1. Transform--where plates essentially grind past each other with no subduction.
2. Convergent--where plates collide. Oceanic plate to oceanic plate convergence will result in the more dense plate subducting under the less dense plate.
3. Divergent--where plates move apart. The major diverging plates are located at the mid-ocean ridge system where melting material from the asthenosphere fills in the separating plate zone, creating new crust.