Despite many difficulties found for ESR dating of bones and carbonates, tooth enamel dated by Electron Spin Resonance ESR has been proven as a reliable method in its application to fossil teeth and quartz.
As these tree rings represent annual growth, merely by counting rings one can count the age of the tree and hence its association.
This dating method with latest methodological advances helps us in defining the calendar year in which the tree-rings were formed and in interpreting such dating in terms of the age of a wooden object.
it follows that atmospheric carbon dioxide has probably been diluted to the extent of about 3½ percent with carbon dioxide from the combustion of fossil fuels.
The radiocarbon evidence indicates, on the basis of a comparison of the radiocarbon assays of old, historically dated marine shells from the Atlantic coast with the assays of their modern counter-parts, that there has been a perceptible dilution of shallow oceanic carbonates with dead carbon from fossil fuels.
Since that time, literally thousands of such measurements have been made, by workers in many different laboratories, and a great variety of archaeological and Recent geological datings have been obtained.
This isotope has a long half-life, something over 5500 years.
It was found that the activity of radiocarbon in the atmosphere was going up and down even before the Industrial Revolution.7-75 This particular correction, however, is only of the order of a few hundred years for most computed dates, so apparently is negligible for the purposes of our studies.
Much more important are the effects of the aforementioned assumptions in the method,7-76 when viewed in the light of the probable events occurring during and immediately after the Flood.
The limited data available suggest that the extent of dilution is possibly one to two percent.7-74 This means that the standard figures as to present content of carbon dioxide in the exchange reservoir of carbon, on which radiocarbon age calculations are based, are incorrect with respect to conditions under which older specimens were formed and have since been decaying.
Although this might be corrected approximately by modifying the standard to one before the Industrial Revolution, the following caution is also in order: Since completion of the present list, a careful study has been made of a series of samples of known age.
This tool has become quite widely used and accepted in recent years and is important to our study since it professes to supply absolute dates for events within the past 30 or 40 thousand years. The formation of radiocarbon (that is, Carbon 14, the radioactive isotope of ordinary carbon) from cosmic radiation was first discovered, however, by Serge Korff, an authority on cosmic rays.