At least 406 human-fossil individuals are placed by evolutionists in this 40,000-to-200,000 ya time-period gap and hence are questionably dated. The inability of the radiocarbon and the K-Ar methods to cover this time period explains why many alternate dating methods have been devised to attempt to give coverage in this area.However, these alternative methods have serious problems of their own.Creationists have noted an interesting pattern in evolutionist writings regarding the dating of fossils.
Of the 84 anatomically modern Homo sapiens fossil individuals dated by evolutionists beyond 40,000 years, 59 of them (70%) fall into this 40,000-to-200,000 ya gap.
(Anatomically modern Homo sapiens fossils that are dated more recently than 40,000 years of age are not of great significance for evolutionary purposes and are not under consideration here.) There are four Neanderthal fossil individuals that are dated more recently than 40,000 years.
The potassium-argon age of some meteorites is as old as 4,500,000,000 years, and volcanic rocks as young as 20,000 years old have been measured by this method.
Evolution places severe demands upon fossils used to support it.
Yet, accurate dating of fossils is so essential that the scientific respectability of evolution is contingent upon fossils having appropriate dates.
Popular presentations of human evolution show a rather smooth transition of fossils leading to modern humans.
Only when they feel they have devised a better method for a specific time period, do they publicly admit the weaknesses of the method they had been using previously.
The result is that the public assumes the dating methods used at any given time are adequate, whereas the dating specialists working with those methods know that this is not necessarily the case.
On the other hand, the abundance of argon in the is relatively small because of its escape to the atmosphere during processes associated with volcanism.
The potassium-argon dating method has been used to measure a wide variety of ages.
This coverage gap lies beyond what is considered the effective range for radiocarbon and prior to what is considered the effective range for potassium-argon.