Questions and Answers
Introduced a new theory that united the theories of continental and seafloor spreading theory.
john tuzo wilson
Occurs in 2 colliding plates, one subducts underneath the other and convection currents in the upper mantle sucks both plates down.
Slab suction
Subducting slab sinks due to differences in temperature or density Denser material subducts
Slab pull
Convection currents drives plates away from each other Caused by the rising of heat from the core to mantle.
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Lithosphere is pushed up by the asthenosphere and creates a new crust.
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A region located at the mantle where heat rises and melts the rocks at the base of the lithosphere and creates magma, which are pushed through cracks in the crust and forms volcanoes. Remains stationary under the moving plates Source of volcanic chains
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EVIDENCES of plate tectonic theory
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Theory of moving crustal plates Incorporates the continental drift theory and the seafloor spreading theory. Explains the formation, movement, and subduction of the earth’s crust. (No plate can move without affecting other plates).
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occurs when an oceanic plate runs into a continental plate and slides beneath it.
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Outermost rigid layer of the earth broken into several segments which are in motion
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