The same program exists in seawater, in which 44Ca/40Ca tends to increase when the speed of removal of Ca2+ by mineral precipitation exceeds the input of latest calcium in to the ocean. In 1997, Skulan and DePaolo presented the 1st evidence of change in seawater 44Ca/40Ca over geologic time, in https://ca43963.prublogger.com/27750622/what-does-environmental-hazardous-materials-in-santa-ana-mean