The same procedure exists in seawater, where by 44Ca/40Ca has a tendency to rise when the rate of elimination of Ca2+ by mineral precipitation exceeds the enter of latest calcium into the ocean. In 1997, Skulan and DePaolo presented the main evidence of adjust in seawater 44Ca/40Ca above geologic time, https://ca49516.blogrelation.com/34123522/hazardous-materials-management-in-irvine-fundamentals-explained