Which of the Following Is NOT a Basic Tenet of Plate

question 22

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 (seafloor spreading).
• C)When the leading edge of a moving slab of oceanic lithosphere collides with another slab,the older,colder,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.