Free sex cam finder - Pb and cs dating
Potassium is about 1/40 of the earth's crust, and about 1/10,000 of the potassium is potassium 40.
We are told that of all the radiometric dates that are measured, only a few percent are anomalous.
This gives us the impression that all but a small percentage of the dates computed by radiometric methods agree with the assumed ages of the rocks in which they are found, and that all of these various methods almost always give ages that agree with each other to within a few percentage points.
For isochrons, which we will discuss later, the conditions are different.
If these conditions are not satisfied, the error can be arbitrarily large.
On the surface, radiometric dating methods appear to give powerful support to the statement that life has existed on the earth for hundreds of millions, even billions, of years.