Do Now: What are some features that result from Plate movements?

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Do Now What are some features that result from
Plate movements?
A. Mountain building formed from pressure of
crustal movements.
1. Folding the process of squeezing rocks into
folds. ExHimalayas, Alps, Rockies formed from
folding.

• Anticlines upfolds
• b. Synclines - downfolds

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2. Faulting a crack in the earths surface
along which movement has occurred. Faulting often
takes place along boundaries between crustal
plates. Movements of these plates at their
boundaries cause faulting.
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Aim What are the different types of Plate
Boundaries?
I. Plate Boundaries
A. Plate Boundary where two plates meet.
B. Diverging Boundaries where two lithospheric
plates are moving apart.
1. Cause mid-ocean ridges (Mid-Atlantic Ridge and
East Pacific Rise)
2. Rift valley both the boundary between the
lithospheric plates and the place where the new
rocks form and push older rocks aside.
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C. Sliding Boundaries the lithospheric plates
are sliding past each other.
1. In California the NA plate and the Pacific
Plate are sliding past each other along the San
Andreas fault.
D. Convergent Boundaries (Collision) when two
plates come together.
1. Collision Boundary when 2 plates carrying
continents converge to form a single landmass
(mountains).
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E. Convergent Boundaries (Subduction)
1. Subduction boundary is when one plate plunges
down under another overriding plate.
2. Deep sea trenches are a result of this
3. Earthquakes at subduction boundaries have deep
origins
4. Conversion of Two Oceanic Plates

• Overriding plate forms a chain of volcanoes
• b. The subduction plate is pulled down to form a
  trench (ex Pacific Plate is subducting under the
  Phillipine Plate.)

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5. Conversion of an Ocean Plate with a
Continental Plate

• Denser ocean plate subsides underneath
  continental plate forming a trench.
• b. A mountain chain is formed on the overriding
  continental crust.