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Plate Tectonics Mountain building process Where is the process found? The converging/destructive plate margin oceanic crust vis-à-vis oceanic crust oceanic crust vis-à-vis continental crust continental crust vis-à-vis continental crust Oceanic-Oceanic convergence Island arcs Magma Sea Trench rises Two plates converge Cracks in the overlying crust Subducted crust melts Converging convection currents of magma The Japanese Island Arc Philippine plate Eurasian Plate Island arcs next to sea trenches Japan Trench Marianas Trench The Pacific Ring of Fire Ocean-continental Sedimentary rock Convergence folded up to form mountain range Crustal melting What if the two plates continue to converge? Which mountain range is formed by this oceanic-continental convergence? The Andes The Andes Nazc Plate and • Collison of ______ a Plate South ____________ American of _________ Nazca • Subduction Plate and form Peruvian Trench the ________ • Crustal melting of the subducted crust and formation of island arcs • Folding of sedimentary rocks previously formed on the Pacific ocean floor • Magma rises to form sills, dykes and volcanoes Continental-Continental Convergence The Himalayas: Collision of Eurasian Plate and Indo-Australian Plate India moving Asia towards Continental-Continental Convergence