Take, for example, the comments of well-known Oxford Hebrew scholar Probably, so far as I know, there is no professor of Hebrew or Old Testament at any world-class university who does not believe that the writer(s) of Genesis 1–11 intended to convey to their readers the ideas that: (a) creation took place in a series of six days which were the same as the days of 24 hours we now experience.
(b) the figures contained in the Genesis genealogies provided by simple addition a chronology from the beginning of the world up to later stages in the biblical story (c) Noah’s flood was understood to be world-wide and extinguish all human and animal life except for those in the ark.
And, these radiometric “clocks” certainly appear to show that living things have in fact existed and changed dramatically on this planet over very very long periods of time indeed!
So, why is this a problem for so many within the church?
However, from what is known so far, the degree of variation caused by these factors appears to be fairly minimal.
So, the ticking of the clock itself still remains fairly predictable and therefore useful as a clock.
Also, even if the actual ticking of the clock is reliable, one has to know if any outside influence has been able to move the hands of the clock beyond what the mechanism of the clock itself can achieve.
Of course, this is where things get a little bit tricky…
Why do I start with the potassium-argon (K-Ar) dating method?
That is, radioactive elements decay at a constant rate into other elements – like a very steady and reliable clock.
Of course, it is now known that this rate is somewhat variable and can be affected by solar flares and other factors (Link).