Its sedimentation is composed primarily of plankton remains.
Its sedimentation is composed primarily of plankton remains. It is the largest single region on Earth for life, and its floor often feature namesake (*) plains created by turbidity currents. Below the bathyal zone and above the haldal zone, its upper boundary is the 4-degree-Celsius isotherm and its typical pressure is 200 to 600 atmospheres. For 10 points— identify this part of the ocean extending from about 2 to 6  kilometers below the surface.
Its sedimentation is composed primarily of plankton remains.
abyssal zone