In any case, there is some uncertainty in one of the critical parameters used by isochron dating models of Rb decay.
One basic assumption that was outlined in a previous —constant decay rates—is equally invalid for this dating method.
A second basic assumption, that the rock suite remains a truly closed system over millions of years, is simply not reasonable since both Rb and Sr are mobile and easily transported via diffusion or hydrothermal action in a rock suite.
During beta decay, the decay energy is shared; thus, the emitted beta particle has a spectrum of energies rather than a single unique energy, making direct detection of the beta particle difficult.
From 1964 through 2012, seven attempts were made to directly measure the half-life of Rb.
Specifically, rocks gathered from recently erupted Mt.
Ngauruhoe in New Zealand gave isochron dates of between 270,000 years and 3.9 billion years—from rocks known to be less than 60 years old! Models, no matter how elegant their mathematics, are only as good as their assumptions and how well they reproduce reality through observation and experimental data.Most readers appreciate the hard science, but many have struggled with the equations.The purpose of this series is to demonstrate in no uncertain terms that these dating methods do not prove that Earth is millions or billions of years old, as is often reported.In addition, Sr produced in this manner to seriously skew the age calculated by this method.The closed-system assumption probably does not hold for this dating method.The K-Ar model does not meet even the basic criteria of a scientific hypothesis.