What characterizes the calcite compensation depth (CCD), in terms of input and destruction (dissolution)?
a. the rate of destruction is greater than the rate of carbonate input.
b. the rate of destruction is equal to the rate of carbonate input.
c. carbonate dissolution is compensated for by increased carbonate input.
d. high levels of productivity are compensated for by greater rates of dissolution.
e. the rate of destruction is less than the rate of carbonate input.