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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. - PowerPoint PPT Presentation
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11.2 – Types of
Mountains
Do NowList the major types of mountains.
Do NowList the major types of mountains.FoldedFault-Block
Key Words Dominant Uplifted
Vocab Words Fault-Block Mountain Folded Mountain Graben Horst Orogenesis
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
Folded Mountains
These are mountains that are formed primarily by folding.
Compressional stresses are the major force that forms folded mountains.
Fault-Block Mountains These are formed as large blocks of crust
are uplifted and tilted along normal faults.
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.
Fault-Block Mountains
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.
Domes and Basins
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?