Transcript 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



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 faultbounded 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?