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Unformatted text preview: CAUSE OF PLATE TECTONICS: is the convection currents in the mantle that carry the plates. TERMINOLOGY OF PLATE TECTONICS: Subduction Zone: Where one plate slides under another Rift Zone: Where two plates pull apart Convergent Margin: Plates are colliding- plate velocities are a few centimeters/year Divergent Margin: Plates are pulling apart Transform Fault Margin: Plates slide past one another- SAN ANDREAS Fault ** PACIFIC OCEAN is surrounded by subduction zones The three types of plate boundaries ( Convergent, Divergent, Transform) are associated w/ volcanos. Magnetic Field:- Origin of Ocean Rocks : located by magnetic lineations- Age of Ocean Rocks: 175 MYA- Age of Continental Rocks: Older be far Place of origin: Direction of Magnetic Field Horizontal: Equator Vertical: Poles OTHER CLUES TO MOTION OF CONTINENTS:- Matching Coastlines Fossils across continents...
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- Spring '08