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Alfred Wegener:•Noticed similarities in the shoreline of continent on both sides of the Atlantic Ocean, he then began fitting them together.
•Introduced the hypothesis of continental drift.
•Suggested a supercontinent, called Pangaea (meaning "all land"), that broke up millions of years ago, slowly moved to their current positions, and continue to move today.
•DIVERGENT- When two plates move away from each other.
Characteristics:
Mid – ocean ridges (underwater mountain ranges)
Rift Valleys (narrow valleys that form where plates separate), Newest rock material (cooling magma forms new oceanic crust).
•CONVERGENT – When two plates collide.
Characteristics: Mountains, most earthquakes, Volcanoes, and trenches
1.ocean – ocean 2.ocean – continent 3.continent – continent
CONVERGENT
•TRANSFORM – When two plates are moving past each other.
Characteristics: San Andreas Boundary
The Pacific plate and North American plate grind past each other side by side.
AREA WITHIN A PLATE WHERE MAGMA WORKS ITSELF TO THE SURFACE ARE CALLED HOT SPOTS.
HOT SPOTS ARE STATIONARY SO WHEN THE PLATE ABOVE IT MOVES A NEW VOLCANOE FORMS.
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