That said IMO it's not so much a problem in the variation of radioactive decay but a possible variance in Time itself, especially at different points across the universe.
So would that also change the very nature of geological processes that formed basement rock, deformed it, infused it with igneous intrusions, laid sedimentary rock on top of it, tilted that, eroded it, and then laid thousands of feet on top of that? As inthe Grand Canyon?
And that's a rather simple geological landscape compared to other locales.