At a subduction zone,the downgoing (subducting) plate
A) is always composed of continental lithosphere.
B) is always composed of oceanic lithosphere.
C) may be composed of either oceanic or continental lithosphere.
D) is composed entirely of asthenosphere.
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Q26: The Wadati-Benioff zone extends down within the
Q27: A volcanic island arc forms when
A) oceanic
Q28: Deep-oceanic trenches are features of _ plate
Q29: At transform plate boundaries,
A) earthquakes are common
Q30: Segments of mid-ocean ridge systems are offset.Between
Q32: On either side of a mid-ocean ridge,the
Q33: The San Andreas Fault zone in California
Q34: Seafloor spreading
A) recycles old oceanic crust.
B) recycles
Q35: At a subduction zone,the overriding plate
A) is
Q36: Oceanic lithosphere thickens away from the mid-ocean
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