Radiocarbon dating dates back to dating wesites barrie ontario
Radiocarbon dates can be obtained from many types of organic material including charcoal, shell, wood, bone and hair.
A unique characteristic of 14C is that it is constantly formed in the atmosphere.
Production and decay 14C atoms are produced in the upper atmosphere where neutrons from cosmic rays knock a proton from nitrogen-14 atoms.
One of the nice things about this method is that we don't have to worry about carbon being lost from the sample.
Because we are measuring the abundance of two isotopes of carbon, and because isotopes of the same element will be chemically identical, no ordinary process can preferentially remove C is going to be small enough to begin with, being only 0.0000000001% of atmospheric carbon, and then as the decay process progresses it's going to get smaller and smaller.
Doesn’t that give accurate dates of “prehistoric” civilizations?