Plate Boundaries and Plate Interactions

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Plate Boundaries and Plate Interactions
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Goals

• Classify and label the types of movement at plate
  boundaries, using a world map that shows relative
  plate motions
• Identify the distribution of plates by means of
  the world map of relative plate motions
• Describe the present plate-tectonic setting of
  your community, and infer possible past
  plate-tectonic activity based on your knowledge.

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• Divergent Plate Boundary
• Convergent Plate Boundary
• Transform Plate Boundary

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Think About It

• Write a caption for this cartoon.
• The most interesting ride on a plate would be the
  leading or trailing plate.

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Investigate page 79

• Answer Part C and Part D
• Read Digging Deeper pg. 80-85
• Answer questions 1-7 on page 85 in your comp
  book.
• No you dont have write the questions in your
  comp book, but only if you write a complete
  answer.
• Add the Geo words into your illustrated glossary.

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Divergent Plate Boundary

• Its a plate boundary where two plates move away
  from one another
• Example South American African Plate

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Divergent Plate Boundary

• Young divergence has thin or thinning crust and
  rift valleys
• Example Mid Ocean Ridge and East Pacific Rise

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Divergent Boundaries
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Convergent Plate Boundary

• A plate boundary where two plates go toward each
  other
• The denser crust will always subduct beneath the
  other crust. Sometimes these make ocean trenches.
• Nazca plate South American Plate

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Convergent Plate Boundary

• If denser oceanic crust subbducts beneath
  continental crust, a volcanic chain
• Ex) Andes or the Cascades

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Convergent Plates

• The sinking material can partially melt. This
  makes volcanic island arcs.
• Ex) Aleutian islands and Japan

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Convergent Plate Boundary
When 2 continents collide that are both to light
to subduct the crust is crumpled and uplifted to
make great mountain chains ex) Himalayas and
Appalachian
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Transform Plate Boundary

• When two plates move parallel from each other
• San Andreas Fault
• AKA parallel slip

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San Andreas Fault

• SAF is the boundary between the North American
  and Pacific plates.
• The fault runs from the Gulf of Calif. NW to
  Mendocino County in N. California

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Transform Plate Boundaries
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Transform Plate Boundaries
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Homework

• Visit the following website and record examples
  of each type of plate boundary into your comp
  book.
• http//geology.com/plate-tectonics.shtml
• Study for your quiz on Tuesday
• Tectonic Setting for Volcanic Activity animations
  

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Warm-Up

• Write a brief definition for each of the
  following terms and give an example of where you
  might find each
• Divergent Plate Boundary
• Convergent Plate Boundary
• Transform Plate Boundary

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Warm-Up

• Convergent boundaries can be in three different
  settings. What are they?
• Name the 3 types of boundaries between
  lithospheric plates
• What happens when two continent plates collide
  along a convergent plate boundary?