Plate Boundaries and Plate Interactions. Goals Classify and label the types of movement at plate...
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Transcript of Plate Boundaries and Plate Interactions. Goals Classify and label the types of movement at plate...
Plate
Boundaries
and Plate
Interactions
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.
• Divergent Plate Boundary• Convergent Plate Boundary • Transform Plate Boundary
Think About It• Write a caption for this cartoon. • The most interesting ride on a plate would
be the leading or trailing plate.
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 don’t have write the questions in
your comp book, but only if you write a complete answer.
• Add the Geo words into your illustrated glossary.
Divergent Plate Boundary
• It’s a plate boundary where two plates move away from one another
• Example: South American & African Plate
Divergent Plate Boundary
• Young divergence has thin or thinning crust and rift valleys
• Example: Mid Ocean Ridge and East Pacific Rise
Divergent Boundaries
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
Convergent Plate Boundary
• If denser oceanic crust subbducts beneath continental crust, a volcanic chain – Ex) Andes or the
Cascades
Convergent Plates
• The sinking material can partially melt. This makes volcanic island arcs.– Ex) Aleutian
islands and Japan
Convergent Plate BoundaryWhen 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
Transform Plate Boundary• When two plates move parallel from each
other• San Andreas Fault• AKA: parallel slip
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
Transform Plate Boundaries
Transform Plate Boundaries
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
Warm-Up
1. Write a brief definition for each of the following terms and give an example of where you might find each:
a) Divergent Plate Boundary
b) Convergent Plate Boundary
c) Transform Plate Boundary
Warm-Up
1. Convergent boundaries can be in three different settings. What are they?
2. Name the 3 types of boundaries between lithospheric plates
3. What happens when two continent plates collide along a convergent plate boundary?