The most common radioactive element in granite is Uranium-238.
) Gen1Denying Evolution Evolution=Millions Of Years Your Imagination 2 Peter 3:5 "For this they are willingly ignorant of, that by the Word of God the heavens were of old, and the earth standing out of the water and in the water:" New Light on Radiometric Dating (Creation Moments.com)Most people find the subject of radiometric dating too technical to understand.
Until recent years, scientists who believe in creation haven't had the necessary resources to explore radiometric dating in detail.
In reality, its measured disequilibrium points to just such a world-altering event, not many years ago.
Outside the range of recorded history, calibration of the 14 clock is not possible.
That is until careful measurements revealed a significant disequalibrium. All the present C-14 would accumulate, at present rates of production and build up, in less than 30,000 years!