Megathrusts Between Subducting Oceanic Crust and an Overriding Plate Are

question 7

Multiple Choice

Megathrusts between subducting oceanic crust and an overriding plate are a potential source of tsunamis because_______ .

• A) oceanic crust is "thrust" over the continent along a megathrust so that forces the land downward producing a tsunami
• B) one side of the fault is on land and the other is underwater so an earthquake could cause a landslide or tsunami depending on which side moved
• C) the earthquakes on these faults are underwater and could displace large amounts of water from the oceans
• D) the earthquakes on these faults are underwater and could release large amounts of water from the asthenosphere

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