Creationism radiocarbon dating
But this assumes the ratio of Ar-36 to Ar-40 since the beginning.
Since Spirorbis tubes are found as a constituent of Carboniferous coal, they are strong evidence for the allochthonous, or transported, origin of much of the coal.
Pure guess work is required to establish the actual concentrations of the isotopes involved in the rubidium-strontium “time clock” at the beginning of a particular mineral.
An extensive discussion of radiocarbon dating in relation to a global sea level cycle is given.
Expansion cracks should occur first along cohesion minimums and grain boundaries, but instead individual cracks surrounding the radioactive inclusion are randomly distributed and occur suddenly, in an explosive fracture.
Anomalous decay rates would explain this world wide phenomena.