What maintains the permanent thermocline found at all low and mid-latitudes?
A) Continual upwelling
B) Warm water currents
C) Density stratification
D) None of these choices
Question 2
Carbonate sediments are rare in deep sea sediments because the ____.
A) organisms providing shells do not live in the deep sea
B) abundance of muds and clays cover the carbonate shells
C) carbonate shells are dissolved in deep water
D) organisms do not live beyond the edge of the continental shelf