Plate tectonics lab. 1 Convergent Boundaries Oceanic to Continental boundary impact - The oceanic plate ALWAYS subducts (goes under) Called Subduction:

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Presentation transcript:

Plate tectonics lab

1 Convergent Boundaries Oceanic to Continental boundary impact - The oceanic plate ALWAYS subducts (goes under) Called Subduction: Oceanic crust pushed down to mantle, where it is melted and rises. See picture  Forms: trenches

2 Convergent Boundaries Continental to Continental boundary impact Mountain formation Causes: Uplift(mountain building) Rocky Mountains

3 Divergent Boundaries Two Oceanic plates-Forms Mid ocean-rifts Called: sea floor spreading: makes new crust Mid-Atlantic Rift

4 Divergent Boundaries Two continental plates- Form rift valleys Called Subsidence which forms valleys Great rift Valley formed by divergent plates

5 Transform Boundaries Transform plates create earthquakes! Oceanic or Continental plates rubbing San Andreas fault: California