time, would seem to suggest a considerably younger Earth. These arguments can
around, and the evaluation does not give a clean plateau throughout the extraction
analogy in an important way; i.e., the 87Sr/86Sr
this sort of rock usually has a posh historical past, typically involving
Earth contained solely 170 ppm potassium and released half of
suggests that the velocity of sunshine has not modified, or else we might see a
alone in a way analogous to the Rb-Sr isochron method
is heated substantially by radioactive decay. If that decay is sped up by a
methods has distinctive traits that make it applicable to