Quote Originally Posted by -Cp View Post
Zheng, Y.-F., 1986. Crust-mantle Rb-Sr mixing isochron and its geological significance. Terra Cognita, vol. 6, p. 151 (abstract).
He wrote this:
‘As it is impossible to distinguish a valid isochron from an apparent isochron in the light of Rb-Sr isotopic data alone, caution must be taken in explaining the Rb-Sr isochron age of any geological system.’9

I'll ask again, where does he state that isochronic dating is totally unreliable and the earth is only 6000 years old?