Some of the basic underlying concepts about calcite-dolomite versus aragonite seas and seawater composition stem from a long series of experimental studies of calcite and aragonite nucleation and growth kinetics (for the most recent review of studies relevant to the marine environment see Morse et al., 2007, which contains ∼340 references). Here we discuss some of the history of those experimental results. These results are discussed in more detail and expanded on in Section 7. A central point is the strong inhibitory influence of dissolved Mg on calcite nucleation and growth which has been recognised for nearly 100...

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