Limitations of carbon 14 dating
Each sample type has specific problems associated with its use for dating purposes, including contamination and special environmental effects.
Measurements have shown that in recent history, radiocarbon levels have remained relatively constant in most of the biosphere due to the metabolic processes in living organisms and the relatively rapid turnover of carbonates in surface ocean waters.Ionization Inverse Square Law Interaction of RT/Matter Attenuation Coefficient Half-Value Layer Sources of Attenuation -Compton Scattering Geometric Unsharpness Filters in Radiography Scatter/Radiation Control Radiation Safety Radio-carbon dating is a method of obtaining age estimates on organic materials.The word "estimates" is used because there is a significant amount of uncertainty in these measurements.Obviously, this works only for things which were once living.
It cannot be used to date volcanic rocks, for example.
It makes no sense at all if man appeared at the end of billions of years.