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?