Both b and c. 28. Most of the floor of the North Pacific Ocean is covered with A. foraminiferan ooze. B. windblown dust and sand. C. red and brown clays. D. diatom ooze.
Submarine canyons occur A. at the part of an ocean basin nearest the poles.
B. at the part of an ocean basin nearest the equator. C. near the edges of ocean basins associated with continental shelves and slopes. D. at the center of an ocean basin, at the edges of the mid-ocean ridge. E. on the edges of trenches. Earth is about A. 6,000 to 10,000 years old.