Cosmic radiation entering the earthâ€™s atmosphere produces carbon–14, and plants take in carbon–14 as they absorb carbon dioxide.

This unstable isotope starts to break down into nitrogen–14.

This is a radiometric technique since it measures radioactive decay.

Carbon–14 is an unstable isotope of normal carbon, carbon–12.

Unfortunately it will not work on the stone maps because the radiocarbon process is only accurate on items between the ages of approximately 600 (10% of the halflife of carbon 14) and 6,000 years old due to standard statistical deviation in the rate of decay and halflife of carbon 14.

The radiocarbon dating method could supply useful information about the age of any organic materials in the inscriptions on the stone maps only if the inscriptions on the stone maps were over 600 and less than 6,000 years old.

This unstable isotope starts to break down into nitrogen–14.This is a radiometric technique since it measures radioactive decay.Carbon–14 is an unstable isotope of normal carbon, carbon–12.Unfortunately it will not work on the stone maps because the radiocarbon process is only accurate on items between the ages of approximately 600 (10% of the halflife of carbon 14) and 6,000 years old due to standard statistical deviation in the rate of decay and halflife of carbon 14.The radiocarbon dating method could supply useful information about the age of any organic materials in the inscriptions on the stone maps only if the inscriptions on the stone maps were over 600 and less than 6,000 years old.This is also true of the heartwood of a tree, which will appear younger than the outer rings of the same tree because it has had less time to incorporate carbon-14 into its makeup.