| He also indicates how mixed families of rock can give anomalous isochron readings, some of which would indicate a negative age for certain rocks. |
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| Should a point plot below the line, it could indicate that a particular sample was open to migration of the dating elements or that the sample was contaminated and lay below the isochron when the rock solidified. |
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| Anns Leucogranite has yielded a younger, Cambrian age using the Rb-Sr isochron method and may represent a later phase of plutonism. |
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| However, isochron dating bears faulty assumptions of its own. |
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| The emplacement of the collision-type Halatu granites took place at ca. 230 Ma based on whole rock, Rb-Sr isochron and zircon Pb evaporation analyses. |
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| New zircon U-Pb and Rb-Sr mineral isochron ages, together with previously published results, indicate that these granites were emplaced in Late Palaeozoic to Late Mesozoic times. |
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| Within the context of Kirchhoff migration, this stretch is associated to the variation in the curvature of isochron surfaces for different times on an input seismic trace. |
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| Subsequently, they used spatial interpolation methods to generate isochron maps that plotted the mean rates of spread of farming in two dimensions. |
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| Isochron dating: Isochron dating was introduced as an attempted substitute for K-Ar dating, after K-Ar's faulty assumptions were exposed. |
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| Isochron dating has been developed in an attempt to solve such problems. |
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