Mountain Building

1
Mountain Building

• Chapter 20

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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
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Ocean-Ocean Convergence
Volcanic island arc
trench
Basaltic magma
Examples Aleutian Islands, Phillipines,______
Japan
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Ocean-Continental Convergence
volcanic mountains
trench
metamorphic rock
Andesitic magma, granitic intrusions
Examples ________, Andes
Cascades
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Continental-Continental Convergence
folded mountains
metamorphic and sedimentary rock
faults
igneous intrusions
Appalachians
Examples Himalayas,______________
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Nonconvergent-Boundary Mountains

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

apart
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Divergent-Boundary Mountain
pillow basalts
intrusive rock
Example
Mid-Atlantic Ridge
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Volcanic Hot Spot Mountain
extrusive ingneous rock
Hawaii
Example ______, Galapagos
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Uplifted Mountains
intrusive igneous rock, less structural
deformation
Adirondacks
Example ____________
13
Fault-Block Mountains
mostly sedimentary rock
Example __________, Basin and Range
Grand Tetons
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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