Beryllium 7 dating
But because God has also called us to wisdom, this issue is worthy of study.
There are over forty such techniques, each using a different radioactive element or a different way of measuring them.
Wiens has a Ph D in Physics, with a minor in Geology.
His Ph D thesis was on isotope ratios in meteorites, including surface exposure dating.
Most processes that we are familiar with are like sand in an hourglass.
In exponential decay the amount of material decreases by half during each half-life.