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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.

But what if one or some combination of these assumptions is incorrect?

One is the Carbon-14 system used for dating fragments of once-living organisms.

It's never used for non-organic samples, and almost never even attempted if the sample is thought to be much older than about 50,000 years.

Radioactive decay has become one of the most useful methods for determining the age of formation of rocks.

However, in the very principal of radiometric dating there are several vital assumptions that have to be made in order for the age to be considered valid.

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