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					Handout: Chapter 11 Notes

      Pages 271 to 284
                  Rock Stress
•    Compression:         BOP IT
    Ø Squeezes and shortens a body of rock
    Ø Near convergent plate boundaries
•    Tension:       PULL IT
    Ø Stretches and pulls a body of rock apart
    Ø Near divergent plate boundaries
•    Shear Stress:        TWIST IT
    Ø Pushes parts of the body of rock in opposite
      directions
    Ø At transform plate boundaries
Rock Stress
     Faults: A break in a body of rock along
    which one block slides relative to another
•    Normal Faults: form at divergent boundaries,
     where the crust is pulling apart
•    Reverse Faults: form a convergent boundaries,
     where the crust is pushed together or
     compressed
•    Strike-Slip Faults: form at transform
     boundaries, where tectonic plates grind past
     each other as they move in opposite directions
Mountain Ranges and Systems
•       Mountain Ranges: a series of mountains
        that are closely related in orientation,
        age, shape, and structure
    •     Mount Everest is part of the Great Himalaya
          Range
•       Mountain Systems: a group of mountain
        ranges that are next to each other
    •     The Appalachian mountain system is made
          up of several mountain ranges
    Plate Tectonics and Mountains: Mountains
      are formed mainly by the collision of 2
                      plates.
•        When oceanic crust meets continental crust
         the continental crust is pushed.
     •     The oceanic crust sinks underneath and melts
           forming volcanoes.
•        When two oceanic plates collide, the more
         dense one sinks below the other.
     •     As it sinks, it melts to form volcanoes.
3. When two continents collide, the crust is
   pushed upwards.
     •     The Himalayas were formed this way when India
           ran into Asia. (still growing)
                             Types of Mountains
   •           Folded Mountains
           •       Highest mountain ranges in the world
           •       Tectonic plates colliding squeeze rock layers
                   upward, folding and faulting them
           •       Himalayas, Appalachians, Alps are
                   examples


Plate Tectonics Comic Book
Page 13
                             Types of Mountains
       2. Fault-Block Mountains
              •        Crust has been stretched and broken into
                       large blocks
              •        Happens where plates are being pulled
                       apart
              •        Sierras, Wasatch, and Teton’s are examples

Plate Tectonics Comic Book
Page 13
                             Types of Mountains
   3. Domed Mountains
           •       Rare type formed when magma rises and
                   pushes up against the surface without
                   breaking through
           •       A rounded mountain with a center peak
           •       Henry Mts. In Utah, Black Hills of S.D. are
                   examples
                                    Henry Mountains In Utah

Plate Tectonics Comic Book
Page 13
           Types of Mountains
4. Salt Domed Mountain
  •   Astronaut view of domed mountain created when salt,
      underlain with petroleum deposits was squeezed up through
      more dense rock layers towards the surface.
The End???

				
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