Deep ocean trenches are surficial evidence for ________.
A. rifting beneath a continental plate and the beginning of continental drift
B. sinking of oceanic lithosphere into the mantle at a subduction zone
C. rising of hot asthenosphere from deep in the mantle
D. transform faulting between an oceanic plate and a continental plate
Answer:B
Deep ocean trenches are surficial evidence for ________.
A. rifting beneath a continental plate and the beginning of continental drift B. sinking of oceanic lithosphere into the mantle at a subduction zone C. rising of hot asthenosphere from deep in the mantle D. transform faulting between an oceanic plate and a continental plate