Radioactive dating age earth

For example, the element Uranium exists as one of several isotopes, some of which are unstable.

The great physicist Lord Kelvin had countered that the planet was actually relatively young — perhaps 20 million years old.

For this purpose, isochron dating was developed, a process "that solves both of these problems (accurate date, assumptions) at once" (Stasson 1992). 2) The process must occur at a relatively uniform rate.

It has been established through extensive experimentation that radioactive decay occurs at a constant rate. In this case, the initial condition is the amount of daughter isotope in the rock when it was formed.

Scientific knowledge of Earth’s geologic history has advanced significantly since the development of radiometric dating, a method of age determination based on the principle that radioactive atoms in geologic materials decay at constant, known rates to daughter atoms.

Radiometric dating has provided not only a means of numerically quantifying geologic time but also a tool for determining the...

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