These techniques are applied to igneous rocks, and are normally seen as giving the time since solidification.

These techniques, unlike carbon dating, mostly use the relative concentrations of parent and daughter products in radioactive decay chains.

For example, potassium-40 decays to argon-40; uranium-238 decays to lead-206 via other elements like radium; uranium-235 decays to lead-207; rubidium-87 decays to strontium-87; etc.

Clearly, such huge time periods cannot be fitted into the Bible without compromising what the Bible says about the goodness of God and the origin of sin, death and suffering—the reason Jesus came into the world (See Six Days? He said, This only makes sense with a time-line beginning with the creation week thousands of years ago.

It makes no sense at all if man appeared at the end of billions of years.

That is, they take up less than would be expected and so they test older than they really are.

Furthermore, different types of plants discriminate differently.

This also has to be corrected for.[2] Second, the ratio of C in the atmosphere at that time to be estimated, and so partial calibration of the “clock” is possible.

Accordingly, carbon dating carefully applied to items from historical times can be useful.

So, we have a “clock” which starts ticking the moment something dies.

Obviously, this works only for things which were once living.

However, even with such historical calibration, archaeologists do not regard C produced and therefore dating the system.