Which of the Following Is Not a Basic Tenet of Plate

question 66

Multiple Choice

Which of the following is not a basic tenet of plate tectonics?

• A) Melted asthenosphere flows upward as magma and cools to form new ocean floor lithosphere.
• B) The new lithosphere slowly moves laterally away from the zones of oceanic crust formation on top of the underlying asthenosphere.
• C) When the leading edge of a moving slab of oceanic lithosphere collides with another slab,the denser slab turns downward and is pulled by gravity back into the asthenosphere (subduction),while the less-dense,more buoyant slab overrides it.
• D) The slab pulled into the asthenosphere begins the process of melting and moves into the liquid core.
• E) The slab pulled into the asthenosphere begins the process of reabsorption into the mantle.

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