Chapter 11
This presentation is the property of its rightful owner.
Sponsored Links
1 / 34

Chapter 11 PowerPoint PPT Presentation

  • Uploaded on
  • Presentation posted in: General

Chapter 11. Mountain Building. I) Where Mountains Form. Mountain Belts 1) Most Mountains are associated with convergent plate boundaries 2) Most mountains occur in long belts that follow convergent boundaries 3) Himalayas lie along a current convergent boundary

Download Presentation

Chapter 11

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript

Chapter 11

Chapter 11

Mountain Building

Chapter 11

I) Where Mountains Form

  • Mountain Belts

  • 1) Most Mountains are associated with convergent plate boundaries

  • 2) Most mountains occur in long belts that follow convergent boundaries

  • 3) Himalayas lie along a current convergent boundary

  • 4) Appalachians are in the middle of a plate – but were formed by converging plates over a billion years ago.

Chapter 11

B) Continental Margins (land and sea meet)

  • Active Margins

  • a) occur along plate boundaries

  • b) mountain building takes place

  • c) Himalayan Mountains

2) Passive Margins

a) stable areas away from plate


b) Appalachian Mountains

Chapter 11

c) Passive margins provide the materials or

sediments from which mountains form.



Chapter 11

IV) Mountain Building

  • Major mountain systems are related

  • to plate tectonics. Most mountains

  • form along convergent boundaries

Where else would

you find mountains?

Divergent Boundaries

Hot Spots

Chapter 11

V) Mountain Facts

A) Himalayan Mountains

1) The largest/highest mountain range

B) Mid-Atlantic Ridge

1) The longest mountain range

Factors that affect mountain deformation

Factors that affect mountain Deformation

  • Deformation – all changes that occur to a body of rock.

  • Temperature

  • Pressure

  • Rock Type

  • Time exposed to pressure or heat

Tectonic forces

Tectonic Forces

Mountains are the result of rock that is permanently deformed by stress/forces

  • Three types of forces cause three types of faults:

  • Tension

  • Compression

  • Shear

Chapter 11


  • Break in crustal rock with movement

Normal faults dip slip fault

Normal Faults(Dip-slip fault)

  • Caused by TENSION forces

  • Occur along divergent plate boundaries

  • Rock ABOVE fault surface moves DOWNWARD

Reverse faults dip slip fault

Reverse Faults (Dip-slip fault)

  • Caused by COMPRESSION forces

  • Occur along convergent plate boundaries

  • Hanging wall surface moves UPWARD

Strike slip faults

Strike-Slip Faults

  • Caused by SHEAR forces

  • Occur along transform plate boundaries

  • Rocks on either side of fault line move past each other with NO vertical movement.

Chapter 11

Horsts & Grabens

  • Large blocks of crust that rise due faulting on either side of the block.

Name this fault

Name this fault!

Chapter 11

III) Types of Mountains

  • Mountains are classified according

  • to their dominant features

B) Four main categories

1) Volcanic mountains (Mt. Shasta)

Volcanic mountains

Volcanic Mountains

  • Formed by lava and pyroclastic material that build up.

Chapter 11

2) Folded mountains

a) Largest mountains on Earth

b) Urals, Himalayas, Appalachians

Folded mountains

Folded Mountains

  • Mountains that form from folding processes (compression)

Chapter 11

A) Folds

1) Rock is bent into a series of waves

2) Results from compressional force

3) Two common types of folds

a) Anticline – upward fold of rock

b) Syncline – downward fold of rock

Chapter 11






Video syncline

Video syncline

Chapter 11

3) Fault-block mountains

a) Uplifted

b) Sierra Nevada Mountains


Chapter 11

Fault-block mountains

a) Tilted

b) Teton Range, WY


Chapter 11


Chapter 11

4) Dome Mountains

  • Individual, isolated structures that form in layers of sedimentary rock.

b) There are two types of dome mountains:

Plutonic Dome

  • an igneous intrusion

  • pushes up existing rock

  • layers.

Chapter 11

Tectonic Dome

  • uplifting forces arch

  • rock layers into a

  • dome

Tectonic Dome:

Black Hills of South Dakota (Mt. Rushmore)

Yosemite National Park

  • Login