Before revision: Carbonate compensation depth (CCD) is the depth in the oceans below which the rate of supply of calcite (calcium carbonate) lags behind the rate of solvation , such that no calcite ispreserved.
After revision: The carbonate compensation depth (CCD) is the depth in the oceans , at which the rate of supply of calcium carbonates matches, the rate of solvation , such that no calcite ispreserved.