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11.2 – Types of Mountains

11.2 – Types of Mountains. Do Now. List the major types of mountains. Do Now. List the major types of mountains. Folded Fault-Block . Key Words. Dominant Uplifted. Vocab Words. Fault-Block Mountain Folded Mountain Graben Horst Orogenesis. Mountains.

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11.2 – Types of Mountains

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  1. 11.2 – Types of Mountains

  2. Do Now • List the major types of mountains.

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

  4. Key Words • Dominant • Uplifted

  5. Vocab Words • Fault-Block Mountain • Folded Mountain • Graben • Horst • Orogenesis

  6. 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

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

  8. Fault-Block Mountains • These are formed as large blocks of crust are uplifted and tilted along normal faults.

  9. 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.

  10. Fault-Block Mountains

  11. 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.

  12. Domes and Basins

  13. 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?

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