Dating the age of the earth
In this equation the primordial lead ratios are required.
The values they assumed were based on the lead isotope ratios observed for three meteorites.
Since meteorites have not proved to be the ancient objects from the sky that one might imagine, it is surprising that they should be assumed to give the primordial lead composition on Earth.
That difficulty aside, they were selected because they contain very little uranium and thorium and are therefore unlikely to contain significant radiogenic lead.
However, it is even more surprising to learn that the lead isotope ratios chosen by Patterson Most meteorites have lead isotope ratios similar to those of present day common lead.
Some evidence is also presented to show that radiometric results that are in agreement with the accepted geological time scale are selectively published in preference to those results that are not in agreement.Scientists associated with the Institute for Creation Research have finished a five-year research project known as RATE, or Radioisotopes and the Age of the Earth. Evidence for a Young World (#384) by Russell Humphreys, Ph. Not Billions Understand the findings of the RATE project. De Young authored this non-technical book in order to equip the layperson to defend scientific six-day creation and refute modern dating techniques. Not Billions - DVD As a companion to the non-technical book, or by itself, Thousands...For over a hundred years, evolutionists have insisted that the earth is billions of years old, and have arrogantly dismissed any views contrary to this belief. Nuclear Decay: Evidence For A Young World (#352) by Russell Humphreys, Ph. Potassium-Argon and Argon-Argon Dating of Crystal Rocks and the Problem of Excess Argon (#309) by Andrew A. Not Billions is the ultimate multimedia resource for any family, student or teacher's library.For teaching and sharing purposes, readers are advised to supplement these historic articles with more up-to-date ones suggested in the Related Articles and Further Reading below.Before 1955, ages for the Earth based on uranium/thorium/lead ratios were generally about a billion years younger than the currently popular 4.5 billion years. old Earth is reviewed and deficiencies of the uranium/lead method are discussed.