Transcript Plate Boundaries and Plate Interactions

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 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
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?