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7 Written questions

6 Multiple choice questions

  1. plates moving toward one another
  2. ridges
  3. magma
  4. >50% SiO2, gooey, highly viscous, becomes explosive, convergent system associated with continental crust formation.
  5. Canadian Shield, Rocky Mtns, Appalachian Mtns, Central TX
  6. cracks

6 True/False questions

  1. Importance of igneous rocks?magma

          

  2. What are the two types of magma/lava?silicic and mafic

          

  3. Igneous rocks compose __% of basement rock. 85% is metamorphic.Canadian Shield, Rocky Mtns, Appalachian Mtns, Central TX

          

  4. Igneous rocks form by the?solidification of magma or lava

          

  5. Mafic rocks are also generated within the __ crust.ridges

          

  6. Shield volcanoes due to extensive outpouring of __/basaltic lava with little pyroclastic material.mafic

          

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