Plate Tectonics

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Plate Tectonics

• Mountain building process

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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

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? Oceanic-Oceanic convergence
Island arcs
Magma rises
Sea Trench
Two plates converge
Cracks in the overlying crust
Subduction
Subducted crust melts
Converging convection currents of magma
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The Japanese Island Arc
Philippine plate
Eurasian Plate
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Island arcs next to sea trenches
Japan Trench
Marianas Trench
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The Pacific Ring of Fire
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? Ocean-continental Convergence
Thrust up
Sedimentary rock folded up to form mountain range
Crustal melting
What if the two plates continue to converge?
8
? Which mountain range is formed by this
oceanic-continental convergence?
The Andes
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The Andes
Nazca

• Collison of ______ Plate and ____________ Plate
• Subduction of _________ Plate and form the
  ________ Trench
• 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

South American
Nazca
Peruvian
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? Continental-Continental Convergence
Where?
Where?
Where?
The Himalayas
? Collision of Eurasian Plate and
Indo-Australian Plate
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? India moving towards Asia
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Continental-Continental Convergence
India
Tibet