It’s futile to argue with creationists over details of the fossil record, or carbon-dating, or anything based on a logical analysis of the many flaws in their argument (including willful ignorance of what science is). The problem is not one of evidence. The problem is that they begin with the conclusion of their argument (“God made the world”) and work backwards: everything else is irrelevant.
Until they can be made to understand that beginning an argument with its conclusion is worthless, every other discussion is rendered moot.