Ch 20 powerpoint

Mountain Building: 

Mountain Building Chapter 20

Isostatic Rebound – crust rises as a result of __________________: 

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

Slide3: 

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

Slide4: 

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

Convergent-Boundary Mountains: 

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

Slide6: 

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

Slide7: 

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

Slide8: 

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

Nonconvergent-Boundary Mountains: 

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

Slide10: 

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

Slide11: 

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

Slide12: 

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

Slide13: 

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

Mountain Building Review: 

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