Not too long ago I noted a hypothesis that the earth may not be as old as it appears.
To add to that, here’s another hypothesis on why carbon dating of elements found on the earth dates the elements at billions of years old.
Colossians 1:16 tells us;
For in him all things were created: things in heaven and on earth, visible and invisible, whether thrones or powers or rulers or authorities; all things have been created through him and for him.
Common sense tells us that everything could not have come from nothing. If Jesus created the world then by implication this was from another realm, from the materials that exist in that realm. And since the realm in which God lives is eternal, then the elements themselves are ancient, prehistoric and could in fact be even older than carbon dating tells us they are.
Therefore Earth can be very young as the Bible says but that does not mean that the elements that make up the Earth are the same age.