Dear God, you're kidding, right? After everything I, and several others, have pointed out to you as to why "buoyancy sorting" does not account for what we see, you're just going to "dismiss it out of hand."
That's creationism for you.
Yes, I will dismiss it out of hand because I've seen the full argument and witnessed how it works, why it works and looked at the data. Strata dating and carbon dating have proven to be largely a joke and that is what made me doubt the traditional story, even with the full rundown which actually involves a circular argument. So, I looked for an alternate solution that had fewer problems or none and no circular arguments and found it. So, yes, I dismiss the traditional approach out of hand. I'm full aware of the arguments against a global flood. There used to be only one "We will not even consider it, shut up".