11.2

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11.2 Types of Mountains
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Do Now

• List the major types of mountains.

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Do Now

• List the major types of mountains.
• Folded
• Fault-Block

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Key Words

• Dominant
• Uplifted

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Vocab Words

• Fault-Block Mountain
• Folded Mountain
• Graben
• Horst
• Orogenesis

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Mountains

• Mountains are classified by the dominant
  processes that have formed them.
• Orogenesis is the collection of processes that
  result in the forming of mountains.
• Two types of mountains
• Folded
• Fault-Block

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Folded Mountains

• These are mountains that are formed primarily by
  folding.
• Compressional stresses are the major force that
  forms folded mountains.

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Fault-Block Mountains

• These are formed as large blocks of crust are
  uplifted and tilted along normal faults.

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Fault-Block Mountains

• Graben - are formed by the downward displacement
  of fault-bounded blocks, when the crust drops
  down.
• Horst - are elongated, uplifted blocks of crust
  bounded by faults, when the crust is pushed up.

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Fault-Block Mountains
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Domes and Basins

• When upwarping produces a circular or elongated
  structure, the feature is called a dome.
• Uplifted mountains are circular or elongated
  structures formed by uplifting of the underlying
  basement rock.

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Domes and Basins
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Group Challenge Question

• In a mountain range, you observe a series of
  anticlines and synclines and numerous thrust
  faults. How would you classify the type of
  mountains in this mountain range?