Ca, and it is referenced up to guide by Faure and Powell (50). Once again, Woodmorappe (134) poorly misrepresents the reality. The “isochron” that Woodmorappe (134) refers to is shown in Figure 6 since it seems in Faure and Powell (50). The info usually do not fall on any right line and try not to, therefore, form an isochron. The first information come from a written report by Wasserburg among others (130), whom plotted the information as shown but failed to draw a 34-billion-year isochron on the diagram.