Carbon 14 not used for dating
Now that the mechanics of plotting an isochron have been described, we will discuss the potential problems of the "simple" dating method with respect to isochron methods.The amount of initial wouldn't change over time -- because it would have no parent atoms to produce daughter atoms.It is not easily explained, in the general case, in any other way.
The equation is the one which describes radioactive decay: If one of these assumptions has been violated, the simple computation above yields an incorrect age.(Rocks which include several different minerals are excellent for this.) Each group of measurements is plotted as a data point on a graph.