Upper Mantle Viscous Drag on the Lithosphere David Terrell Warner Pacific College March 2006.
Plate Tectonics. The theory that pieces of Earth’s lithosphere are in constant motion, driven by...
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Transcript of Plate Tectonics. The theory that pieces of Earth’s lithosphere are in constant motion, driven by...
Plate TectonicsPlate Tectonics
Plate TectonicsPlate Tectonics
• The theory that pieces of Earth’s lithosphere are in constant motion, driven by convection currents in the mantle.
• CD + SFS + “plates” = Plate Tectonics!
FaultsFaults
• Breaks in earth’s crust where rocks move
Faults meet at BoundariesFaults meet at Boundaries
• 3 kinds of boundaries:
• Convergent
• Divergent
• Transform
Divergent BoundaryDivergent Boundary
• Where 2 plates move apart
• Mid-ocean ridge (oceanic)
• Rift Valley (continental)
Mid-Ocean Ridge (SFS)Mid-Ocean Ridge (SFS)
Rift ValleyRift Valley
Convergent BoundaryConvergent Boundary
• Where 2 plates collide
• Oceanic-Oceanic
• Oceanic-Continental
• Continental-Continental
• Outcome determined by DENSITY
Oceanic-Oceanic Convergent BoundaryOceanic-Oceanic Convergent Boundary
Oceanic-ContinentalConvergent BoundaryOceanic-ContinentalConvergent Boundary
Continental-ContinentalConvergent BoundaryContinental-ContinentalConvergent Boundary
Transform BoundaryTransform Boundary
• 2 plates slide past each other in opposite directions