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Characteristics, Tectonic Processes, and Examples of Plate Boundaries Plate Plate Movement Crust Type(s) Sea Floor Tectonic Geographic Boundary Created or Destroyed? Processes Examples ************************************************************************************************************* Divergent Apart Ocean-Ocean New Sea Floor Created Sea Floor Spreading Mid-Atlantic Ridge East Pacific Rise -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Continent-Continent As continent splits apart, Continental Rifting East Africa Rift Valley new sea floor created Red Sea Gulf of California _____________________________________________________________________________________________________________ Convergent Together Ocean-Continent Old sea floor destroyed Subduction Andes Mts. Cascade Mts. -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ocean-Ocean Old sea floor destroyed Subduction Aleutian Islands Mariana Islands -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Continent-Continent N/A Collision Himalaya Mts. Alps ______________________________________________________________________________________________________________________ Transform Past Each Other Oceanic Sea floor neither created Transform Faulting Mendocino Fault nor destroyed Eltanin Fault (bet. mid-ocean ridges) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Continental Sea floor neither created Transform Fault San Andreas Fault nor destroyed Alpine Fault (New Zealand)
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