What prevents the subduction of terranes?
a. The relative thin layer of crusts
b. The low density
c. The proximity from plate boundaries
d. The compression of continental crust
ANS: B
The thickness and low density of the terranes prevent subduction. Terranes are ancient island arcs and
parts of continental crust that are squeezed and sheared off onto the face of a continent. Information
can be found in the section Contemporary Oceanography Makes Use of Modern Technology.
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