Maximum effective dating range for carbon 14 dating ready for dating games
Potassium (K) is one of the most abundant elements in the Earth's crust (2.4% by mass).One out of every 10,000 Potassium atoms is radioactive Potassium-40 (K-40).Potassium-Argon Dating Potassium-Argon dating is the only viable technique for dating very old archaeological materials.Geologists have used this method to date rocks as much as 4 billion years old.It seems limited, how can an observer know the state of the decay of a certain molecular structure even 100,000 calendar years ago?
By comparing the proportion of K-40 to Ar-40 in a sample of volcanic rock, and knowing the decay rate of K-40, the date that the rock formed can be determined.
We also need to calibrate how much carbon-14 it had to begin with.
To do that we need records of how much was being made from nitrogen.
Where "A bit" is a few parts in a trillion or less, most likely very much less.
Carbon-14 has a half-life of 5,730 years so decays fairly quickly to unusable proportions.
No, I'll take scientific observations any day of the week, it's just that so much of science must, as a discipline, base their observations on the painstaking recording of observable physical data.