Ah CTD, the old dodge dodge.
Acknowledging (as everyone who's looked into the issue has) that Polonium can be a result of decay does not alter anything. The halos in question are not produced by uranium - they're produced by polonium. Were there uranium present, it would also have left a telltale halo of its own when it decayed.
The evidence isn't consistent with uranium being present in the center of the halos. It is consistent with polonium.
So you agree that Polonium occurs naturally, and thus can find it's way - as pointed out by several people - into the rocks where the halo's are formed.
Therefore Polonium halos in question are evidence of recent Polonium, but not of a young earth.
Were there uranium present, it would also have left a telltale halo of its own when it decayed.
The evidence isn't consistent with uranium being present in the center of the halos. It is consistent with polonium.
Which doesn't address the issue of halos where uranium
IS at the center, and which have taken several hundred million years to form (due to the decay rate of Uranium vs Polonium).
Or are you going to argue a special pleading that this phenomena apply to Polonium halos but not to Uranium halos?
Enjoy.
