All our calculations could be correct (observational science), but the result could be wrong.This is because we failed to take into account some critical assumptions.Types of igneous rocks include granite and basalt (lava).
We know that radioisotope dating does not always work because we can test it on rocks of known age.
Radioisotope dating is commonly used to date igneous rocks.
These are rocks which form when hot, molten material cools and solidifies.
That is, billion-year half-lives can be measured statistically in just hours of time.
The following table is a sample of different element half-lives.