Transcript The Faults - Raleigh Charter High School

Gautam Sanka
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The earth is broken into seven large and
moving plates.
The plates are about an average 50 miles thick
They typically move about a couple of inches
each year.
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Convergent Boundaries- are when two plates
move toward each other and collide
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When an Oceanic plate collides with a continental
plate, the oceanic plate goes beneath the
continental plate. This is called Subduction.
 Ex. Nazca and South American Plate
 Subduction also forms trenches
Convergent
Boundary
Trench
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When two continental plates collide, they form
mountain ranges.
 Ex. When the Indian plate converged with the Eurasian
plate, it formed the Himalayas.
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Divergent Boundaries are where plates move
away from each other.
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Ex. Mid-Ocean Ridge
Where plates diverge, hot, molten rock rises and
cools adding new material to the edges of the
oceanic plates. This is known as Sea-floor
Spreading.
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Transform Fault-Boundaries are where plates
move past each other.
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Ex. San Andreas Fault