The process of mineral sequestration traps carbon in the form of solid carbonate salts. This type of sequestration is very slow. An example of this in nature is the deposition and accumulation of limestone (calcium carbonate) over geologic time. It is the carbonic acid found in ground-water that slowly reacts with the silicates to dissolve magnesium, calcium, silica, and alkalis to form clay minerals. When creatures with shells die, the shells are deposited in the sediments on the seafloor and
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