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I) Where Mountains Form A)Mountain Belts 1) Most Mountains are associated with convergent plate boundaries 2) Most mountains occur in long belts that.

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Presentation on theme: "I) Where Mountains Form A)Mountain Belts 1) Most Mountains are associated with convergent plate boundaries 2) Most mountains occur in long belts that."— Presentation transcript:

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2 I) Where Mountains Form A)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.

3 B) Continental Margins (land and sea meet) 1)Active Margins a) occur along plate boundaries b) mountain building takes place c) Himalayan Mountains 2) Passive Margins a) stable areas away from plate boundaries b) Appalachian Mountains

4 c) Passive margins provide the materials or sediments from which mountains form. Active Passive

5 IV) Mountain Building A)Major mountain systems are related to plate tectonics. Most mountains form along convergent boundaries Where else would you find mountains? Divergent Boundaries Hot Spots

6 V) Mountain Facts A) Himalayan Mountains 1) The largest/highest mountain range B) Mid-Atlantic Ridge 1) The longest mountain range

7 Factors that affect mountain Deformation Deformation – all changes that occur to a body of rock. 1.Temperature 2.Pressure 3.Rock Type 4.Time exposed to pressure or heat

8 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

9 1)Break in crustal rock with movement

10 Normal Faults (Dip-slip fault) Caused by TENSION forces Occur along divergent plate boundaries Rock ABOVE fault surface moves DOWNWARD WwdPJbDTQ&feature=relatedhttp://www.youtube.com/watch?v=bh WwdPJbDTQ&feature=related

11 NormalReverseThrustStrike- Slip Type of Force Name of Boundary Type of Mountains Direction it is moving / illustration

12 Reverse Faults (Dip-slip fault) Caused by COMPRESSION forces Occur along convergent plate boundaries Hanging wall surface moves UPWARD

13 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.

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15 qpk&feature=related

16 Horsts & Grabens Large blocks of crust that rise due faulting on either side of the block. VMk&feature=relatedhttp://www.youtube.com/watch?v=5rmF4bY7 VMk&feature=related

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18 Name this fault!

19 III) Types of Mountains A)Mountains are classified according to their dominant features B) Four main categories 1) Volcanic mountains

20 Volcanic Mountains Formed by lava and pyroclastic material that build up.

21 2) Folded mountains a) Largest mountains on Earth b) Urals, Himalayas, Appalachians

22 Folded Mountains Mountains that form from folding processes (compression)

23 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

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25 Anticline

26 Synclines

27 Syncline

28 Monocline

29 Subduction zone animation dscreen&NR=1&v=K8J7t3KYr9chttp://www.youtube.com/watch?feature=en dscreen&NR=1&v=K8J7t3KYr9c

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31 3) Fault-block mountains a) Uplifted b) Sierra Nevada Mountains

32 Fault-block mountains a) Tilted b) Teton Range, WY

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36 4) Dome Mountains a)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.

37 Tectonic Dome Tectonic Dome: Black Hills of South Dakota (Mt. Rushmore) Yosemite National Park uplifting forces arch rock layers into a dome

38 NormalReverseThrustStrike- Slip Type of Force Name of Boundary Type of Mountains Direction it is moving / illustration


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