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Tectonic Plate Boundaries Page 105 Think: Plates are movingmoving away, towards, or past each other! What happens?? Plate Boundary • Place where edges of tectonic plates meet. • 3 Different types of plate boundaries based on motion of the plates: Convergent Boundary • When two plate collide or crash into each other. • 3 Possibilities: – Oceanic into Oceanic – Oceanic into Continental – Continental into Continental • Convergent Boundary • One plate must go under the other. This is called Subduction. • Subduction only occurs at convergent boundaries Subduction • One tectonic plate goes under another, back into the mantle to be recycled. Divergent Boundary • When two plates move away from each other • Sea floor spreading • New lithosphere is created to fill the “gap.” • Transform Boundary • Two plates slide past each other • Lithosphere is not created or destroyed
