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Mountain Building

Mountain Building. Chapter 20. Isostatic Rebound – crust rises as a result of __________________. removal of mass. This iceberg demonstrates the process of isostatic rebound. Folded rock layers produced by compressional forces. This part of the folded mountain shows a __________. syncline.

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Mountain Building

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  1. Mountain Building Chapter 20

  2. Isostatic Rebound – crust rises as a result of __________________ removal of mass This iceberg demonstrates the process of isostatic rebound.

  3. Folded rock layers produced by compressional forces. This part of the folded mountain shows a __________. syncline

  4. Example of new crust being formed at Iceland. _____ type volcano on the mid-Atlantic ridge. Sheild

  5. Convergent-Boundary Mountains • The following three slides show mountain types produced when plates move __________. together

  6. Ocean-Ocean Convergence Volcanic island arc trench Basaltic magma Examples: Aleutian Islands, Phillipines,______ Japan

  7. Ocean-Continental Convergence volcanic mountains trench metamorphic rock Andesitic magma, granitic intrusions Examples: ________, Andes Cascades

  8. Continental-Continental Convergence folded mountains metamorphic and sedimentary rock faults igneous intrusions Appalachians Examples: Himalayas,______________

  9. Nonconvergent-Boundary Mountains • The next four slides show mountains formed at divergent boundaries (plates moving _____), hot spots, and areas of faulting or uplift. apart

  10. Divergent-Boundary Mountain pillow basalts intrusive rock Example: Mid-Atlantic Ridge

  11. Volcanic Hot Spot Mountain extrusive ingneous rock Hawaii Example: ______, Galapagos

  12. Uplifted Mountains intrusive igneous rock, less structural deformation Adirondacks Example: ____________

  13. Fault-Block Mountains mostly sedimentary rock Example: __________, Basin and Range Grand Tetons

  14. Mountain Building Review • The Galapagos Islands formed as a result of a ___________. • The Appalachians are about _________ years old. • The Appalachians are a __________ mountain range. • The Cascades (Mt St Helens, Mt Rainier,…) are a ___________ mountain range with ___________ eruptions. hot spot 600-700 million folded volcanic explosive

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