They point to a catastrophic origin for granites, consistent with the biblical timeframe for earth history and God’s judgment during the Flood.
The heavens declare the glory of God; and the firmament shows His handiwork.
By comparing the proportion of K-40 to Ar-40 in a sample of volcanic rock, and knowing the decay rate of K-40, the date that the rock formed can be determined.
Potassium (K) is one of the most abundant elements in the Earth's crust (2.4% by mass).
Along with stratigraphic assumptions, the U-Pb and Th-Pb dating methods have been regarded as the gold standard for “deep-time” dating.