amber benson adam busch dating - Radiometric dating of the oldest rocks on earth

Some of the common isotope pairs used are K-Ar, Rb-Sr, Pb-Pb, and U-Pb.

radiometric dating of the oldest rocks on earth-73

The claimed “fact” that decay rates have always been constant is actually an inference based on a uniformitarian assumption.

It is true that radioisotope decay rates are stable today and are not largely affected by external conditions like change in temperature and pressure, but that does not mean that the rate has always been constant.

The reason this age may not be a true age—even though it is commonly called an absolute age—is that it is based on several crucial assumptions.

Most radiometric dating techniques must make three assumptions: The major problem with the first assumption is that there is no way to prove that the decay rate was not different at some point in the past.

Uniformitarian geologists use so-called dating methods to determine the ages of the surrounding rocks.

Certain types of rocks, especially those that form from magma (igneous), contain radioactive isotopes of different elements.Recent research by a team of creation scientists known as the RATE (arth) group has demonstrated the unreliability of radiometric dating techniques.Even the use of isochron dating, which is supposed to eliminate some initial condition assumptions, produces dates that are not reliable.If certain things are known, it is possible to calculate the amount of time since the parent isotope began to decay.For example, if you began with 1 gram of carbon-14, after 5,730 years you would be left with 0.50 g and only 0.25 g after 11,460 years.It is possible to measure the ratio of the different radioactive parent isotopes and their daughter isotopes in a rock, but the ratios are not dates or ages.

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