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29 Cards in this Set
- Front
- Back
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Plate tectonics
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The theory that the Earth's lithosphere is divided into teconic plates that move around on top of the Asthenosphere.
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Convergent Boundary
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When two tectonic plates collide.
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Divergent Boundary
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When two tectonic plates seperate.
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Transform Boundary
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When two tectonic plates slide past eachother horizontally.
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What does Ridge Push cause?
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Ridge push causes the oceanic lithosphere to slide downhill under the force of gravity.
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Whar does Slab Pull cause/do?
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The edge of the tectonic plate that contains oceanic lithosphere sinks and pulls the rest of the tectonic plate with it.
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What does Convection cause?
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Convection causes the oceanic lithosphere to move sideways and away from the mid-ocean ridge.
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A Subduction Zone is . . .
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When a plate with oceanic crust collides with a plate with continental crust.
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What occurs at a convergent boundary between two continental plates?
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Mountains. Continental crust pushes upward creating mountains.
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What occurs at a convergent boundary between two oceanic plates?
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Trench
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What occurs at a convergent boundary between an oceanic plate and a continental plate?
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Volcanoes
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What occurs at transform boundaries?
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Earthquakes.
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What occurs at a divergent boundary between two oceanic plates?
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Mid-Ocean ridges
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Name an example of where you can go in the U.S and see a tranform boundary.
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The San Andreas Fault in California.
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Stress
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A force on an object - causes deformation.
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Deformation
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The process by which the shape of a rock changes because of stress.
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Compression
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They type of stress that occurs when an object is squeezed, such as when two tectonic plates collide.
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Tension
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Tension is stress that occurs when forces act to stretch an object, or pull it.
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Folding
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The bending of rock layers because of stress in the Earth's crust.
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Anticline
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Most common fold; upward-arching folds. Caused by stress.
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Syncline
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Downward, troughlike folds caused by stress.
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Monocline
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When rock layers are folded so that both ends of the folds are horizontal.
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Fault
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A break in a body of rock along which one block slides relative to another.
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Fault block
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The blocks of crust on each side of the fault.
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Hanging Wall
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A non-vertical wall that the tip is hanging.
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Foot Wall
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A non-vertical wall which is sloping upward.
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Normal Fault
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??
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Reverse Fault
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Caused by compression, hanging wall moves up relative to the footwall.
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Strike-Slip Fault
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Caused by lateral movement of plates alongside eachother.
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